Wireless and Fiber Optics

The optical research team engages in fibre optics, optical sensing, fibre lasers, optical beam outdoor and indoor propagation with respect to atmospheric influence on free-space optic (FSO) links and last but not least in visible light communication (VLC). Currently, our scientific effort is focused on fundamental research as well as on cooperation with industry in the field of applied research.

MEMBERS OF THE GROUP

Stanislav Zvánovec
Coordinates activities of the team in the fields of free-space optics, visible light communications, radio over optics and optical fiber systems and sensors.
Matěj Komanec
Leads the research and development in the field of specialty optical fibers. Focuses on hollow-core fibers, fiber characterization, fiber-optic sensors and fiber interconnection technology.
Jan Bohata
Focuses on microwave photonics and optical fiber and free-space optics systems.
Shivani Teli
Focuses on Visible Light Communication based Internet of Things.
Ailing Zhong
Works on hollow-core optical fibers, higher-order mode mitigation, and Fabry-Perot interferometers.
Carlos Guerra Yánez
Specializes in visible light communication and free-space optics for short to medium ranges
Klára Eöllősová
Investigates new approaches in optical camera communications using illuminating optical fibers.
Jan Šístek
Engages in fibre optics and microwave techniques.
Satish Kumar Modalavalasa
Combines optical and millimeter wave wireless sensor technology within digital twin concept.
Radek Nesnídal
Focuses on optical sensor networks, including free-space and fiber-optic approaches.
Jan Vocílka
Engages in microwave photonics.
Vojtěch Mičín
His main topic is hollow-core fibers and environmentally insensitive interferometry.
Dong-Nhat Nguyen
Focuses on mitigation of transmission impairments in high bit-rate millimeter-wave radio-over-fibre and FSO systems for 5G networks.
 

Other team members:

Jan Spáčil — radio over fiber, microwave photonics, driving electronics.
Rida Zia-ul-Mustafa — advanced Security in Visible Light Communication Systems (Ph.D. student of Northumbria University, supervisor Dr. Hoa Le Minh, co-supervisor prof. Zvanovec).
Raul Zamorano-Illanes — Design and development of optical sensors for WSN (Ph.D. student of Northumbria University, supervisor Dr. Ghassemlooy, co-supervisor prof. Zvanovec).
Christos Giachoudis — High-reliability and energy-efficient scheduling and routing for medical body-area networks (Ph.D. student of Ecole Centrale Méditerranée Marseille, supervisor Dr. Khalighi, co-supervisor prof. Zvanovec).
Atiya Fatima Usmani — Optimization of hybrid WSNs network protocols and topologies (Ph.D. student of Instituto de Telecomunicaçoes Portugal, supervisor Dr. Alves, co-supervisor prof. Zvanovec).




 

Visiting researchers:

András Mihály — Budapest University of Technology and Economics 2024
Vaigai Nayaki Yokar
— Northumbria University 2023
Marta Botella Campos
— Universitat Politecnica de Valencia 2022
Lidia Aguiar
— Universidad de Las Palmas de Gran Canaria 2021-22
Eleni Niarchou
— Universidad de Las Palmas de Gran Canaria 2021 + 2023
Cristo Jurado-Verdú
— Universidad de Las Palmas de Gran Canaria 2022
Zun Htay
— Northumbria University 2021 + 2022
Othman Younus
— Northumbria University 2021
Juan Andres Apolo Gonzaga
— Universitat Politecnica de Valencia 2021
Xicong Li
— Northumbria University 2020
Nithin Mohan — Northumbria University 2019
Luis Vallejo — Universitat Politecnica de Valencia 2019 + 2021
Fatemeh Fataholmanan Najafabadi — Isfahan University of Technology 2019
Vicente Matus — Universidad de Las Palmas de Gran Canaria  2019 + 2020
Pooria Tabeshmehr — University of Tehran  2019
Andrew Burton — Northumbria University 2018
Oussama Haddad — Ecole Centrale Marseille 2018 + 2019
Patricia Chavez-Burbano — Universidad de Las Palmas de Gran Canaria  2018
Hoa Le Minh — Northumbria University  2018
Meng Ding — Southampton University 2018
Richa Priyadarshani — Indian Institute of Technology Delhi  2018
Paul Anthony Haigh — University of Bristol  2014 + University College London  2018
Amalia Nallely Castro Martínez — Universidad Nacional Autónoma de México  2015
Hassan K. Bakir Al-Musawi — Northumbria University  2015
Tamas Cseh — Budapest University of Technology and Economics  2015
Svetlana Korsakova — Saratov State University  2015
Mojtaba Mansour Abadi — Northumbria University  2014 + 2018
Hatef Nouri — Ozyegin University  2014
Joaquin Perez — Northumbria University  2013


FORMER MEMBERS OF THE GROUP

Tomáš Němeček
Focuses on advanced fiber sensors for gas and liquid detection.
Petr Pešek
Deals with LTE transfer through optical infrastructures (both fiber and FSO/VLC).
Petr Chvojka
Focuses on visible light communications.
Dmytro Suslov
Focuses on the supercontinuum generation in microstructured optical fibers.
Zahra Nazarichaleshtori
Focuses on visible light communications using organic LEDs (OLEDs).
Daniel Dousek
Focuses on hollow-core optical fibers, mode-field adapters and interferometers.
Petr Dvořák
Focuses on measurement methods in optical systems and microwave radiometry.
 


RESEARCH TOPICS

Speciality Optical Fibers
 +  anti-resonant fibres, hollow-core photonic bandgap fibres

With the invention of photonic crystal fibres (PCFs, or also denoted as microstructured optical fibres, MOFs) in 1996, a new field of research opened for optical fibres as for telecommunications (wavelengths 1260 – 1620 nm) the conventional silica single-mode fibre was already a mastered technology. PCFs allow vast opportunities of parameter design by modification of their inner air-hole structure, such as the chromatic dispersion, attenuation, single-mode regime, nonlinearity and many more. Furthermore, with the advances in glass processing, non-silica glasses (fluoride, lead-silicate, chalcogenide, etc.) can be exploited to move deeper into the near and mid-infrared region. In the past few years, hollow-core fibres, as the masterpiece of PCFs, have been prepared with reasonably low attenuation enabling cutting-edge applications.

At the moment the research of our team is mainly focused on hollow-core photonic bandgap fibres (HC-PBGFs) and anti-resonant fibres (ARFs), where both fibre types guide light in a hollow air-core. Hollow-core fibres offer many advantages over conventional solid-core fibres due to the strongly reduced interaction of the guided light with the glass material. Examples of such benefits are the extremely low fibre non-linearity, low and stable signal latency, the possibility to construct long-length gas cells.

We concentrate on the efficient light coupling from standard solid-core fibres into hollow-core fibres. We have designed and developed the interconnection using a world-unique approach. We propose anti-reflective or highly reflective layers with respect to state-of-the-art research applications. All this is made on an international level in cooperation with one of the world-leading institutes in PCFs, the University of Southampton.

Our background includes experience with PCF characterization, fibre tapering for sensor purposes, rare-earth doped amplifiers and lasers. Furthermore, we have a brand new glass fusion station, the top-shelf Fujikura/AFL LZM-100 giving us countless possibilities of research extensions.


Free-space Mach-Zehnder interferometer.


Photonic-bandgap hollow-core optical fiber.


Microstructured solid-core optical fiber.


Fiber-Optic Sensors
 +  detection of liquids, displacement measurement, fiber-optic gyroscope

Fibre-optic sensors (FOS) can be found almost anywhere, preventing disasters, improving healthcare, analyzing food quality, enhancing performance in industry and helping to reveal fundamental natural phenomena. By using optical fibres, physical quantities such as temperature, pressure, force, flow, rotation, position and radiation can be measured. Moreover, electromagnetic field can be analyzed in terms of magnetic fields having effects on polarization in the optical fibre.

The most successful representatives are fibre Bragg grating (FBG) sensors, which monitor buildings, bridges and other constructions for possible cracks. Also, also fibre-optic gyroscopes (FOG), which are the most precise gyroscopes used especially for aerial and space inertial navigation.

In our team, we focus on three kinds of FOS: i) We investigate refractometric sensors for detection of liquid quality, either by refractive index or by spectroscopic analysis. We developed fibre tapers with enhanced evanescent-wave overlap, designed and prepared photonic crystal fibres for sensing and also experimented with chalcogenide multimode sensors for MIR spectroscopy; ii) We are involved in the research of precise displacement measurement using Fabry-Perot interferometers (FPI). Furthermore, we now focus on FPI in combination with hollow-core fibres (see the section above); iii) Last but not least we have been involved in FOG development, both in hardware and software.

Our background includes experience with fibre-optic sensor design, spectroscopy, fibre-optic gyroscopes, fibre tapering and extremely precise interferometers. Furthermore, we have a brand new glass fusion station, the top-shelf Fujikura/AFL LZM-100 giving us countless possibilities of research extensions and sensor preparation.


Samples preparation.


Detection of liquid analytes of picoliter volumes.


Experimental configuration for fiber-optic evanescent-wave sensors.

 

Microwave Photonics
 +  5G systems, radio-over-fibre

Microwave photonics combines multidisciplinary fields of optical, microwave and electrical engineering. Therefore, it must cover the spectrum area from very low frequencies (below 1 kHz) up to hundreds of THz associated with the optical domain. In our team, we mainly focus on characterisation, testing and optimisation of optical components for utilisation in new wireless networks operating in high-frequency bands.  Also, overall systems as radio over fibre (RoF) and radio over free-space optics (RoFSO) are tested to maximise transmission capacity and flexibility under different conditions. We have several running projects and international collaboration on microwave photonics with universities in Southampton and Valencia.


Radio over fiber (RoF) link.


Microwave transmission over hybrid fiber/FSO infrastructure.


Outdoor RF antenna transmission with RoF system.

 

Free-space Optics Systems
 +  diversity techniques, relay links, thermal and atmospheric turbulence

Free-space optics (FSO) introduces a line-of-sight optical wireless communication (OWC) technology which offers many advantages for modern communication infrastructures including large frequency bandwidth and substantially high available data rates, immunity to electromagnetic interference, license-free spectrum, higher security of transmission due to narrow optical beams etc. Nevertheless, many factors may affect an optical beam causing fluctuations of the received optical signal like a scattering of small particles, beam wandering and scintillation caused by thermal turbulence or atmospheric turbulence, which is the major factor of bit error rate performance degradation.

In our research, we exploit several wireless optical links in the CTU campus connected into a simple network and as well our dedicated turbulent chamber and OWC laboratory. We characterize atmospheric parameters and from that develop behavioural models of atmospheric turbulence. The error performance of the FSO links under turbulences can be significantly improved using diversity techniques, e.g. by employing multiple transmit or receive apertures or by utilization of several relay FSO links (here, we experimentally test both amplify and forward and regeneration and forward techniques).

Our international collaborators include academic research groups from Northumbria University, KU Leuven, Indian Institute of Technology Delhi and other teams.


Outdoor measuring FSO network​.


Laboratory experiment of FSO link characterization.


Measurement of fog influence.

 

Visible Light Communications
 +  digital signal processing, optical camera communications, organic LEDs

In recent years, visible light communications (VLC) has rapidly gained interest among research communities worldwide. It is an emerging technology for future high capacity communication links utilizing the visible range of the electromagnetic spectrum (~370-780 nm), which is not only licensed free but free from spectral overcrowding unlike radio frequencies (RF). VLC utilizes light-emitting diodes (LEDs), modulating them at high speeds that are much faster than the human eye can detect, to simultaneously provide data transmission and room illumination. A major challenge in VLC is the LED modulation bandwidths, which are limited to a few MHz.

Recently, we have been focused mainly on the signal processing techniques enabling effective utilization of the transmission bandwidth in VLC. We have adopted multi-band carrier-less amplitude and phase (m-CAP) modulation in VLC domain, originally developed for optical fibre networks, and proposed and verified a number of techniques improving m-CAP performance in terms of bit rate, spectral efficiencies, and computational complexity. Among inorganic LEDs, organic-based LEDs (OLEDs) represent a possible solution for solid-state lighting applications due to their advantage such as ultra-low costs, mechanical flexibility, and large photoactive areas. However, their modulation bandwidth is limited to a few hundreds of kHz introducing significant bottle-neck in VLC networks. Thus, we are also focused on equalization schemes that enhance VLC systems performance and are necessary for designing OLED based networks.

We have many international academic collaborations with world-leading research groups in the field of VLC, including Northumbria University and Newcastle University.

Laboratory measurement of a VLC system.


Experimental testing of flexible OLED for VLC.


An LED driver including a bias-T.

Optical camera communication (OCC) can be considered a convenient and versatile short-range communication technology within the framework of optical wireless communications. OCC is a pragmatic version of VLC based on a smart device camera that allows easier implementation of various services in smart devices. OCC can be a more favourable solution, especially in indoor environments, due to one compelling fact that the OCC is based on a camera as the receiver and nearly six billion smartphones fitted with cameras are available worldwide.

We have addressed the issue of longer processing time in OCC using neural network-based processing for applications such as motion detection over the existing OCC links. The motion detection is considered as an add-on functionality in OCC to control various smart devices in smart home environments. Recently we have focused on OCC System for Internet of Things based on OLEDs. Performance of outdoor OCC links using focusing and defocusing techniques for applications such as vehicle-to-vehicle communications is also performed in an outdoor environment. Currently, we are working on OCC link analysis to develop multiuser environment as well as to provide mobility in indoor OCC scenarios. Collaborative work with international academic institutes working in the same field gives a way out to interesting results for the ongoing research. Our international collaborators include academic research groups from the University of Las Palmas de Gran Canaria and Northumbria University.


Corridor testing of OCC links.


Smartphone-based OCC system.


MIMO OCC setup.

PROJECTS

Ongoing projects:

  • Horizon Europe (HORIZON) / Marie Skłodowska-Curie Action Doctoral Networks (MSCA-DN) project “OWIN6G” – Optical and Wireless Sensors Networks for 6G Scenarios
  • COST Project CA19111 European Network on Future Generation Optical Wireless Communication Technologies (NEWFOCUS)
  • Advanced microwave photonics techniques based on hollow-core optical fibers, GACR project GA22-32180S
  • LED module technology for fiber optic lighting, (in cooperation with SQS, fiber optics a.s), TACR grant FW01010571
  • Metrology and quality control of optical infrastructure of 5G and VHCN networks (n cooperation with PROFiber Networking CZ s.r.o.), TACR grant FW03010551
  • High-speed optical source modules for data centers, (in cooperation with Argotech a.s.), Ministry of industry and trade project MPO TRIO FV40089
  • Advanced fiber optical and microwave technologies, ČVUT project SGS20/166/OHK3/3T/13

Selected past projects:

Click to expand.


  • H2020 Marie Skłodowska-Curie Innovative Training Network (ITN) project “VisIoN” (Visible light based Interoperability and Networking)
  • COST Project CA16220 European Network for High Performance Integrated Microwave Photonics (EuIMWP)
  • Radio-optical transmission terminal for 5G networks, MPO grant TRIO FV30427
  • High-precision fiber collimator arrays, MPO grant TRIO FV30136
  • COST project IC1101 Optical Wireless Communications – An Emerging Technology, OPTICWISE, http://www.cost.eu/domains_actions/ict/Actions/IC1101
  • Wideband Optical Source Based on Soft-glass Fibers (in cooperation with SQS, fiber optics a.s), TACR grant TA04010220
  • Combined Radio Frequency and Visible Light Bands for Device-to-Device communication (in cooperation with 5Gmobile (5GM) research lab), GACR grant 17-17538S
  • Analyzer of modal structure in optical components, (in cooperation with PROFiber Networking CZ s.r.o.), Ministry of industry and trade project MPO TRIO FV10519
  • Fiber optic detection of liquids (in cooperation with SQS, fiber optics a.s), TACR grant TA03010060
  • Optical packet switch (in cooperation with SQS, fiber optics a.s, IFE AV ČR), TAČR grant TA01011105
  • Development of optical sensors and systems and microwave biomedical technologies, ČVUT projekt SGS17/182/OHK3/3T/13
  • Research of Ambient Influences on Novel Broadband Optical Wireless Systems – RAINBOWS, MŠMT COST_CZ project LD12058
  • Centre for quasi-optical systems and terahertz spectroscopy, project LC06071 (with VŠCHT and VUT)
  • Quadrupole Interactions as a Powerful Tool for the Conformational and Structural Analyses of Biochemically and Astrophysically Important Molecules (with VŠCHT), GAČR project GAP206/10/2182
  • The Influence of the Atmosphere on Electromagnetic Wave Propagation for Broadband Stratospheric Links, GAČR project GP102/08/P346



SELECTED RESEARCH PARTNERS

Academic

  • Northumbria University, Newcastle upon Tyne United Kingdom (Prof. Zabih Ghassemlooy)
  • University of Southampton United Kingdom (Dr. Radan Slavik)
  • Universitat Politècnica de València Spain (Prof. Beatriz Ortega)
  • Universidad de Las Palmas de Gran Canaria (Prof. Rafael Perez-Jimenez)
  • Universitade de Aveiro, Portugal, (Prof. Luis Nero Alves)
  • KU Leuven, Belgium, (Dr. Nobby Stevens)
  • Ecole Centrale Marseille, Institut Fresnel France (Dr. Ali Khalighi)
  • German Aerospace Center (DLR), (Dr. Florian Moll)
  • Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut, (Prof. Volker Jungnickel)
  • Indian Institute of Technology Delhi India (Prof. Manav R. Bhatnagar)
  • Institute of Photonics and Electronics, The Czech Academy of Sciences Czech Republic
  • CESNET, Czech Republic

Industry

  • SQS Fiber Optics a.s.
  • Argotech a.s.
  • PROFiber Networking s.r.o.
  • NETWORK GROUP, s.r.o.
  • RFspin, s.r.o.
  • Valeo
  • MaxLinear
  • Rohde & Schwarz
  • Honeywell International s.r.o.




SELECTED PUBLICATIONS

Books and chapters in books

  • Z. Ghassemlooy, L. Nero Alves, S. Zvanovec and M. Ali Khalighi, Visible Light Communications: Theory and Applications, CRC Press, 2017.
  • C. D’Andrea, J.M. Jornet, A.Singh, P. Sen, Z. Ghassemlooy, S. Zvanovec, S.R. Teli, A. Gholami, 6G Wireless Technologies, chapter in The Road towards 6G: Opportunities, Challenges, and Applications A Comprehensive View of the Enabling Technologies, Ed: V. Loscri, L. Chiaraviglio, A. Maria Vegni, pp. 78-114, 2024.
  • N. A. M. Nor, Z. Ghassemlooy, M. Komanec, J. Bohata, S. Zvanovec, M. R. Bhatnagar, M-A.and Khalighi, All-optical relay-assisted FSO systems,  chapter in  Principles and Applications of Free Space Optical Communications ed: A. K. Majumdar, Z. Ghassemlooy, A. A. B. Raj, pp. 195-226, IET, 2019.
  • I. A. Alimi, A. M. Abdalla, J. Rodriguez, P. P. Monteiro, A. L. Teixeira, S. Zvanovec, Z. Ghassemlooy, Enabling VLC and WiFi Network Technologies and Architectures Toward 5G, chapter in Optical and Wireless Convergence for 5G Networks, ed. A. M. Abdalla, J. Rodriguez, I. Elfergani, A. Teixeira,  pp. 101-122, Wiley-IEEE Press, 2019.
  • Z. Ghassemlooy, P. Luo, S. Zvanovec, Optical Camera Communications, chapter in Optical Wireless Communications – An Emerging Technology, ed. M. Uysal et al., Springler, pp. 447-568, Springer,  2016. 
  • Z. Ghassemlooy, M. Uysal, M. A. Khalighi, V. Ribeiro, F. Moll, S. Zvanovec, A. Belmonte, An Overview of Optical Wireless Communications, chapter in Optical Wireless Communications – An Emerging Technology, ed. M. Uysal et al., pp.1-23, Springler, 2016. 
  • Z. Ghassemlooy, W. Popoola, S. Zvanovec, Diversity for Mitigating Channel Effects, chapter in Optical Wireless Communications – An Emerging Technology, ed. M. Uysal et al., Elsevier, pp. 431-450, Springer, 2016
  • P. Pechac, S. Zvanovec, Principles of Radiowave Propagation for Planning of Terrestrial Radio Links. 1. ed. Praha: BEN – technicka literatura, 2007. 200 p. ISBN 978-80-7300-223-7. (in Czech).
  • P. Piksa, S. Zvánovec, P. Černý, Specific Millimeter-Wave Features of Fabry-Perot Resonator for Spectroscopic Measurements, book chapter in Microwave and Millimeter Wave Technologies from Photonic Bandgap Devices to Antenna and Applications. Vukovar: In-Teh, 2010, p. 451-468. Available from: http://sciyo.com/articles/show/title/specific-millimeter-wave-features-o…

 

Journal papers

  • L. A. Ruiz‐Preciado, P. Pesek, C. Guerra-Yanez, Z. Ghassemlooy, S. Zvanovec, G. Hernandez-Sosa, Inkjet-printed High-performance and Mechanically Flexible Organic Photodiodes for Optical Wireless Communication, Scientific Reports, vol.14, 3296, 2024.
  • A. Zhong, M. Ding, E. N. Fokoua, S. Zvanovec, F. Poletti, M. Komanec, R. Slavık, End-Capping Hollow-Core Fibers With Suppressed Coupling Into Higher-Order Modes, IEEE Journal of Selected Topics in Quantum Electronics, vol. 30, no.6, 4300909, 2024.
  • A. Zhong, E. N. Fokoua, M. Ding, D. Dousek, D. Suslov, S. Zvanovec, F. Poletti, R. Slavik, M. Komanec, Connecting hollow-core and standard single-mode fibers with perfect mode-field size adaptation, IEEE Journal of Lightwave Technology, vol. 42, no. 6, pp. 2124-2130, 2024.
  • M. Komanec, C. Guerra-Yanez, K. Eollos Jarosikova, S. Zvanovec, Side-emitting Fiber based Distributed Receiver for Visible Light Communication Uplink, Optics Letters, vol. 48, no. 23, pp. 6180-6183, 2023.
  • S. R. Teli, V. Matus, C.L. Aguiar, R. Perez-Jimenez, Z. Ghassemlooy, S. Zvanovec, Curved OLED-based NLOS optical camera communications links, Applied Optics, vol. 62, no. 30, pp. 8204-8210, 2023.
  • K. Eollos Jarosikova, V. Neuman, C. M. Jurado Verdu, S. R. Teli, S. Zvanovec, M. Komanec, Long-Distance Indoor Optical Camera Communication Using Side-Emitting Fibers as Distributed Transmitters, Optics Express, vol. 31, no.11, pp. 26980-26989, 2023.
  • M. Komanec, L. Halmo, V. Adler, J. Bohata, M. Botella-Campos, J. Zverina, S. Zvanovec, Directly-Modulated 1310 nm Laser TOSA developed for seamless millimeter wave radio over fiber transmission, IEEE Access, vol.11, pp. 63895-63903, 2023.
  • D. Suslov, M.Komanec, T.W. Kelly, A. Zhong, S. Zvanovec, F. Poletti, N. Wheeler, R. Slavik, All-fiber hollow core fiber gas cell, Optical Fiber Technology, vol. 81, 103513, 2023.
  • S. R. Teli, C. Guerra-Yanez, V. Matus, R. Perez-Jimenez, Z. Ghassemlooy, S. Zvanovec, Hybrid Optical Wireless Communication for Versatile IoT Applications: Data Rate Improvement and Analysis, IEEE Access, vol.11, pp. 55107-55116, 2023.
  • O. I. Younus, N. Chaudhary, Z. Ghassemlooy, L. Nero Alves, S. Zvanovec, D. Pattas,  V.K. Papanikolaou, A Unilateral 3D Indoor Positioning System Employing Optical Camera Communications, IET Optoelectronics, vol.17, pp. 110-119, 2023.
  • L. Vallejo, J. Bohata, J. Mora,  S. Zvanovec, B. Ortega, Remote mmW photonic local oscillator delivery for uplink down-conversion in DML-based optical hybrid C-RAN fronthaul , Journal of Optical Communications and Networking, vol. 15, no. 6, pp. 357-366,2023.
  • J. Bohata, D.-N. Nguyen, P. T. Dat, Z. Ghassemlooy, B. Ortega, S. Zvanovec, A Scalable 26 GHz RoF Relay System using Optoelectronic Extender, IEEE Photonics Technology Letters, vol. 35, no.6, pp. 293-296, 2023.
  • A. Zhong, M. Ding, D. Dousek, D. Suslov, S. Zvanovec, F. Poleti, D. J. Richardson, R. Slavik, M. Komanec, A gap design to enable functionalities into nested antiresonant nodeless fiber based systems, Optics Express, vol. 31, no 9, pp. 15035-15044, 2023.
  • J. A. Apolo,S. R. Teli, C. Guerra-Yánez, V. Almenar,B. Ortega, S. Zvánovec, Asymmetric hybrid full-duplex POF-based VLC transmission links, Optik, vol. 278 (170701), 2023.
  • L. Vallejo, B. Ortega, J. Mora, D.-N. Nguyen, C. Guerra, J. Bohata, J. Spacil, S. Zvanovec, Demonstration of M-QAM OFDM Bidirectional 60/25 GHz Transmission over 10 km Fiber, 100 m FSO and 2 m Radio Seamless Heterogeneous Fronthaul Link, Optical Fiber Technology, vol 77, 103161, 2023.
  • C. Guerra-Yanez, A. Mederos-Barrera, I. de Marco, D. Orsucci, F. Moll, Z. Ghassemlooy, S. Zvanovec, The Throughput Bottleneck of Quantum-secure
    Communication Links: Analysis and Mitigation, IEEE Transactions on Communications, accepted…
  • E. Niarchou, K. Eollos-Jarosikova, V. Matus, R. Perez-Jimenez, S. Zvanovec, M. Komanec, J. Rabadan, Experimental Evaluation of Wearable LED Strip and Side-Emitting Fiber for Optical Camera Communications Systems, Optics Express, accepted…
  • J. Bohata, M. Botella-Campos, J. Mora, B. Ortega, S. Zvanovec, Centralized full-duplex seamless photonic mmW fronthaul link based on phase modulation, Journal of Optical Communications and Networking, accepted…
  • S.R. Teli, V. Matus, S. Vitek, R. Perez-Jimenez, Z. Ghassemlooy, S. Zvanovec, FFT-based Frequency Detection and Interference Analysis for NLOS MIMO-OCC, IEEE Access, submitted…
  • R. Zia-ul-Mustafa, H. Le Minh, Z. Ghassemlooy, S. Zvanovec, O. I. Younus, X. Li, A. T. Pham, A Novel Uplink Positioning and SVD-based Physical Layer Security Scheme for VLC Systems, IEEE Journal on Selected Areas in Communications, submitted… 
  • E. Eso, Z. Ghassemlooy, S. Zvanovec, M.R. Bhatnagar, High-speed optical camera communications with multi-level intensity modulation for IoT Applications, IEEE Wireless Communications,  submitted…
  • J. De Bruycker, J. Audenaert, S. R. Teli, S. Zvanovec, M. Heredia Conde, L. De Strycker, Nobby Stevens, An Experimental Testbed for the Performance Evaluation of Optical Time Difference of Arrival based Indoor Positioning, IEEE Journal of Lightwave Technology, submitted…
  • M.W. Eltokhey, M.S. Bashir, O.I. Younus, Z. Ghassemlooy, H. Haas, G.K. Karagiannidis, S.R. Teli, S. Zvanovec, M.-A. Khalighi, Z. C. Zhang, S. Hranilovic, M. Brandt-Pearce, J.-P. Linnartz, A. Trichili, H. Chun, D. O’Brien, M. Uysal, M.-S. Alouini, Optical Wireless Communications: Illuminating the Path for Cooper’s Law, Proceedings of the IEEE, submitted…
  • C. Guerra-Yanez, T. Novak, J. Vojtech, Z. Ghassemlooy, S. Zvanovec, Quantum State Tomography of Photon Polarization Using Fiber Components, submitted…
  • R. Zia-Ul-Mustafa,  C. Guerra-Yanez, H. Le-Minh,  S. Zvanovec, Z. Ghassemlooy, A Secure Visible Light Communication System with BB84 and Physical Layer Security, submitted…
  • C. Guerra-Yanez, V. Guerra, C. Jurado-Verdu, J. Rabadan, R. Perez-Jimenez, Z. Ghassemlooy, S. Zvanovec, A General Framework for the Calculation of Irradiance Distributions of Symmetric Sources, Optics Express, vol. 30, issue 24, pp. 43910 – 43924, 2022.
  • J. Bohata, L. Vallejo, B. Ortega, S. Zvanovec, Optical CS-DSB Schemes for 5G mmW Fronthaul Seamless Transmission, Photonics Journal, vol. 14, no. 2, pp. 1-7, 2022.
  • S. R. Teli, P. Chvojka, S. Vitek, S. Zvanovec, R. Perez-Jimenez, Z. Ghassemlooy, A SIMO Hybrid Visible Light Communication  System for Optical IoT, IEEE Internet of Things Journal, vol. 9, no.5. pp. 3548-3558, 2022.
  • D. Suslov,  E. R. Numkam Fokoua, D. Dousek, A. Zhong, S. Zvanovec, T. D. Bradley, F. Poletti, D. J. Richardson, M. Komanec, R. Slavik, Low loss and broadband low back-reflection interconnection between a hollow-core and standard single-mode fiber, Optics Express, vol. 30, issue 20, pp. 37006-37014, 2022.
  • M. Nassiri, G. Baghersalimi, Z. Ghassemlooy, P. A. Haigh, S. Zvanovec, Spectrally and Power Efficient Non-DC MIMO Super-Nyquist m-CAP Visible Light Communications system with Linear Pre- and DFE Post-Equalizer, Digital Signal Processing, vol. 131, 2022.
  • R. Slavik, E. N. Fokoua, T. D. Bradley, A. A. Taranta, M. Komanec, S. Zvánovec, V. Michaud-Belleau, F. Poletti, D. J. Richardson, Optical Time Domain Backscattering of Antiresonant Hollow Core Fibers, Optics Express, vol. 30, no.17, pp. 31310-31321, 2022.
  • Z. Htay, C. Guerra-Yánez, Z. Ghassemlooy, S. Zvanovec, M.M. Abadi, A. Burton, Experimental Real-time GbE MISO FSO Under Fog Conditions with Software Defined GNU Radio Platform-based Adaptive Switching, Journal of Optical Communications and Networking, vol. 14, issue 8, pp. 629-639, 2022.
  • T. Kamalakis, Z. Ghassemlooy, S. Zvanovec, L. Nero Alves, A. Khalighi, Optimization and Design of a Diffuse Optical Wireless Sensor Network, Applied Optics, vol. 61, no. 22, pp. 6599-6608, 2022.
  • X. Li, Z. Ghassemlooy, S. Zvanovec, L. Nero Alves, M. Figueiredo, P. Chvojka, A Full-digital M-CAP Receiver with Synchronisation and Adaptive Blind Equalisation for Visible Light Communications, IEEE Journal of Lightwave Technology, vol. 40, issue 8, pp. 2409-2426, 2022.
  • D.-N. Nguyen, L. Vallejo, V. Almenar, B. Ortega, P. T. Dat, S. T. Le, J. Bohata, S. Zvanovec, Full-duplex transmission of multi-Gb/s subcarrier multiplexing and 5G NR signals in 39 GHz band over fiber and space,  Applied Optics, vol. 61, no. 5, pp. 1183-1193, 2022.
  • J. Spacil, J. Bohata, D.-N. Nguyen, M. Mazanek, S. Zvanovec, Effect of erbium-doped fiber amplifier loss compensation on 5G new radio millimeter-wave
    seamless transmission over analog fiber and free space optical fronthaul at 60 GHz, Optical Engineering, vol. 61, no. 6, pp. 066104-1-9, 2022.
  • O. Haddad, M. A. Khalighi, S. Zvanovec, Performance Analysis of Optical Extra-WBAN Links Based on Realistic Channel Modeling, Optical Engineering, vol. 61, no.2, pp.  026113-1-15, 2022.
  • J. Bohata, D.-N. Nguyen, J. Spáčil, D. Suslov, D. Dousek, S. Zvánovec, Z. Ghassemlooy, M. Komanec, Performance Evaluation of Seamless 5G Outdoor RoFSO Transmission at 39 GHz, IEEE Photonics Technology Letters, vol. 34, no.1, pp. 7-10, 2022.
  • Z. Nazari Chaleshtori, S. Zvanovec, Z. Ghassemlooy , M. A. Khalighi, Visible light communication with OLEDs for D2D communications considering user movement and receiver orientations, Applied Optics, vol. 61, no.3, pp. 676-682, 2022.
  • T. Kamalakis, Z. Ghassemlooy, S. Zvanovec, L. Nero Alves, Analysis and simulation of a hybrid visible-light/infrared optical wireless network for IoT applications, Journal of Optical Communications and Networking, vo.14, issue 3, pp. 69-78, 2022.
  • N. Mohan, Z. Ghassemlooy, E. Li, M.M. Abadi, S. Zvanovec, R. Hudson, Z. Htay, The BER Performance of a FSO System with Polar Codes Under Weak Turbulence, IET Optoelectronics, vol. 16, pp. 72-80, 2022.
  • N. Chaudhary, O.I. Younus, L. Nero Alves, Z. Ghassemlooy, S. Zvanovec, The Usage of ANN for Regression Analysis in Visible Light Positioning Systems, Sensors, vol. 22, 2879, 2022.
  • R. Slavik, D. Dousek, D. Suslov, M. Komanec, S. Zvanovec, F. Poletti, D. J. Richardson, Polarization stable hollow core fiber interferometer with Faraday rotator mirrors, IEEE Photonics Technology Letters, vol. 33, no.24, pp. 1503-1506, 2021.
  • L. Vallejo, J. Mora, D.-N. Nguyen, J. Bohata, V. Almenar, S. Zvanovec, B. Ortega, On the 40 GHz Remote versus Local Photonic Generation for DML-based C-RAN Optical Fronthaul, IEEE Journal of Lightwave Technology, vol. 39, no. 21, pp. 6712-6723, 2021.
  • S. M. Mana, V. Jungnickel, K. L. Bober, P. Hellwig, J. Hilt, D. Schulz, A. Paraskevopoulos, R. Freund, K. Hirmanova, R. Janca, P. Chvojka, S. Zvanovec, Distributed Multiuser MIMO for LiFi: Experiments in an Operating Room, IEEE Journal of Lightwave Technology, vol. 39, no. 15, pp. 5730-5743, 2021.
  • J. Bohata, D.-N.Nguyen, J. Spacil, M.Komanec, B. Ortega, L. Vallejo, Z. Ghassemlooy, S. Zvanovec, Experimental Comparison of DSB and CSDSB mmW Formats over a Hybrid Fiber and FSO Fronthaul Network for 5G, Optics Express, vol. 29, no.17, pp. 27768-27782, 2021.
  • S. R. Teli, K. Eollosova, S. Zvanovec, Z. Ghassemlooy, M. Komanec, Optical camera communications link using a LED-coupled illuminating optical fiber, Optics Letters, vol. 46, no. 11, pp.2622-2625, 2021.
  • E. Eso, Z. Ghassemlooy, S. Zvanovec, P. Pesek, J. Sathian, Vehicle-to-Vehicle Relay-Assisted VLC with Misalignment Induced Azimuth and Elevation Offset Angles, IEEE Photonics Technology Letters, vol. 33, no 16, pp. 908-911, 2021.
  • H. B. Eldeeb, E. Eso, E. A. Jarchlo, S. Zvanovec, M. Uysal, Z. Ghassemlooy, J. Sathian, Vehicular VLC: A Ray Tracing Study Based on Measured Radiation Patterns of Commercial Taillights, IEEE Photonics Technology Letters, vol. 33, no 16, pp. 904-907, 2021.
  • X. Li, Z. Ghassemlooy, S. Zvanovec, L. Nero Alves, An Equivalent Circuit Model of a Commercial LED with an ESD Protection Component for VLC, IEEE Photonics Technology Letters, vol. 33, no. 15, pp. 77-779, 2021.
  • E. Eso, Z. Ghassemlooy, S. Zvanovec, J. Sathian, A. Gholami, Fundamental Analysis of Vehicular Light Communications and the Mitigation of Sunlight Noise, IEEE Transactions on Vehicular Technology, vol. 70, no. 9, pp. 5932-5943, 2021.
  • Z. Htay, Z. Ghassemlooy, M.M. Abadi, A. Burton, N. Mohan, S. Zvanovec, Performance Analysis and Software-Defined Implementation of Real-Time MIMO FSO with Adaptive Switching in GNU Radio Platform, IEEE Access, vol. 9, pp. 2169-3536, 2021.
  • A. Burton, P. Chvojka, P. A. Haigh, Z. Ghassemlooy, S. Zvanovec, Optical Filter-less WDM for Visible Light Communications using Defocused MIMO, Electronics, vol. 10, pp. 1-10, 2021.
  • J. Bohata, M. Komanec, J. Spacil, P. Hazdra, T. Lonsky, Z. Hradecky, S. Zvanovec, Experimental Demonstration of a Microwave Photonic Link Using an Optically Phased Antenna Array for a Millimeter Wave Band, Applied Optics, vol. 60, issue. 4, pp. 1013-1020, 2021.
  • D. Suslov, M. Komanec, E. R. N. Fokoua, D. Dousek, A. Zhong, S. Zvanovec, T. Bradley, F. Poletti, D. J. Richardson, R. Slavık, Low loss, high-performance interconnection between standard single mode fiber and antiresonant hollow-core fiber, Scientific Reports,vol. 11 Issue 1, 2021.
  • O. I. Younus, N. B. Hassan, Z. Ghassemlooy, S. Zvanovec, L. Nero Alves, H. Le-Minh, , Sensors, The Utilization of Artificial Neural Network Equalizer in Optical Camera Communications, Sensors, vol. 21, issue 8, pp. 1-18, 2021.
  • X. Li, Z. Ghassemlooy, S. Zvanovec, P. A. Haigh, A 40 Mb/s VLC System Reusing an Existing Large LED Panel in an Indoor Office Environment, Sensors, vol. 21, issue 5, pp. 1-16. 2021.
  • V. Matus, V. Guerra, C. Jurado-Verdu, S. Zvanovec, R. Perez-Jimenez, Wireless Sensor Networks using Sub-Pixel Optical Camera Communications: Advances in Experimental Channel Evaluation, Sensors, vol. 21, issue 8, pp. 1-18, 2021.
  • V. Matus, V. Guerra, S. Zvanovec, J. Rabadan, R. Perez-Jimenez, Sandstorm effect on experimental optical camera communication, Applied Optics, vol. 60, no.1, pp. 75-82, 2021.
  • E. Eso, Z. Ghassemlooy, S. Zvanovec, J. Sathian, M. M. Abadi, O. Younus, Performances of Vehicular Visible Light Communications under the Effects of Atmospheric Turbulence with Aperture Averaging, Sensors, vol. 21, issue 8, pp. 1-17, 2021.
  • M. Ding, Z. Feng, D. Marpaung, X. Zhang, M. Komanec, D. Suslov, D. Dousek, S. Zvanovec, E. R. N. Fokoua, T. D. Bradley, F. Poletti, D. J. Richardson, R. Slavik, Optical Fiber Delay Lines in Microwave Photonics: Sensitivity to Temperature and Means to Reduce it, IEEE Journal of Lightwave Technology, vol. 39. Issue. 8, pp.2311-2318, 2021.
  • N. Chaudhary, O. I. Younus, L. Nero Alves, Z. Ghassemlooy, S. Zvanovec, H. Le-Minh, An Indoor Visible Light Positioning System using Tilted LEDs with High Accuracy, Sensors, vol. 21, issue 3, pp.1-16, 2021.
  • F. M. Alsalami, Z. Ahmad, S. Zvanovec, P. A. Haigh, O.C.L. Haas, S. Rajbhandari, Statistical channel modelling of dynamic vehicular visible light communication system, Vehicular Communications, vol. 29, no. 100339, 2021.
  • L. Vallejo, B. Ortega, D.-N. Nguyen, J. Bohata, V. Almenar, S. Zvanovec,  Usability of a 5G fronthaul based on a DML and external modulation for M-QAM transmission over photonically generated 40 GHz, IEEE Access, vol. 8, pp. 223730-223742, 2020.
  • D.-N. Nguyen , J. Bohata, J. Spacil, M. Komanec, N. Stevens, Z. Ghassemlooy, P.T. Dat, S. Zvanovec,  Polarization division multiplexing-based hybrid microwave photonic links for simultaneous mmW and sub-6 GHz wireless transmissions, IEEE Photonics Journal, vol. 12, no. 6, 5502814, 2020.
  • Z. Nazari Chaleshtori, Z. Ghassemlooy, H. B. Eldeeb, M. Uysal, S. Zvanovec, Utilization of an OLED-based VLC System in Office, Corridor and Semi-open Corridor Environments, Sensors, vol. 20, 6869, pp.1-15, 2020.
  • S. R. Teli, S. Zvanovec, R. Perez-Jimenez, Z. Ghassemlooy, Spatial frequency-based angular behavior of a short-range flicker-free MIMO-OCC link, Applied Optics, vol. 59, no. 33, pp. 10357-10368, 2020.
  • D.-N. Nguyen , J. Bohata, S. Zvanovec, L. Nguyen, Z. Ghassemlooy, Turbulence mitigation in a 28 GHz radio-over-free-space optics link using an integrated Mach-Zehnder interferometer and a diversity combining receiver, IET Communications, vol. 14, issue 19, pp. 3373-3379, 2020.
  • D.-N. Nguyen, L. Vallejo, J. Bohata, B. Ortega, Z. Ghassemlooy, S. Zvanovec, Wideband QAM-over-SMF/turbulent FSO downlinks in a PON architecture for ubiquitous connectivity, Optics communications, vol. 475, pp. 1-9, 2020.
  • M. Komanec, D. Dousek, D. Suslov, S. Zvanovec, Hollow-Core Optical Fibers, Radioengineering, vol. 29, no. 3, pp. 417-430, 2020.
  • J. De Bruycker, W. Raes, S. Zvanovec, N. Stevens, Polarization Differential Visible Light Communication: Theory and Experimental Evaluation, Sensors, vol. 20, 5661, pp.1-19, 2020.
  • O. Saied, Z. Ghassemlooy, S. Zvanovec, R. Kizilirmak, B. Lin, Unipolar-pulse amplitude modulation frequency division multiplexing for visible light communication systems, Optical Engineering, vol. 59, no.9, pp. 096108-1-12, 2020.
  • M. M. Abadi, P. Hazdra, J. Bohata, P. Chvojka, P. A. Haigh, Z. Ghassemlooy, S. Zvanovec, A Head/Taillight Featuring Hybrid Planar Visible Light Communications/Millimetre Wave Antenna for Vehicular Communications, IEEE Access, vol. 8, pp. 135722-135729, 2020.
  • J.  Bohata, M. Komanec, J. Spacil, R. Slavík, S. Zvanovec, Transmitters for Combined Radio over a Fiber and Outdoor Millimeter-wave System at 25 GHz, IEEE Photonics Journal, vol.12, no. 3, 2020.
  • S. R. Teli, V. Matus, S. Zvanovec, R. Perez-Jimenez, S. Vitek, Z. Ghassemlooy, Optical camera communications for IoT – Rolling-shutter based multi-channel MIMO scheme, SENSORS, vol. 20, pp.1-15, 2020.
  • P. Pesek, P. A. Haigh, O.I. Younus, P. Chvojka, Z. Ghassemlooy, S. Zvanovec, An Experimental Multi-User VLC System using Non-Orthogonal Multi-Band CAP Modulation, Optics Express, vol. 28, no.12, pp. 18241-18250, 2020.
  • P. Chvojka,  P. A. Haigh, A. Minotto, A. Burton, P. Murto, Z. Genene, W. Mammo, M. R. Andersson, E. Wang, Z. Ghassemlooy, F. Cacialli, I. Darwazeh, S. Zvanovec, Expanded Multi-Band Super-Nyquist CAP Modulation for Highly Bandlimited Organic Visible Light Communications, IEEE Systems Journal, vol. 12, no. 2, pp. 2544-2550, 2020.
  • O. Haddad, M.A. Khalighi, S. Zvanovec, M. Adel, Channel Characterization and Modeling for Optical Wireless Body-Area Networks, IEEE Open Journal of the Communications Society, vol. 1, pp. 760-776, 2020.
  • N. Mohan, M. M. Abadi, Z Ghassemlooy, S. Zvanovec, R. Hudson, M. Bhatnagar, Sectorised Base Stations for FSO Ground to Train Communications, IET Optoelectronics, vol. 14, pp. 312-318, 2020.
  • P. Chvojka, A. Burton, P. Pesek, X. Li, Z. Ghassemlooy, S. Zvanovec, P. A. Haigh, Visible Light Communications: Increasing Data Rates with Polarisation Division Multiplexing, Optics Letters, vol. 45, no. 11, pp. 2977-2980, 2020.
  • L. Vallejo, D.-N. Nguyen, J. Bohata, B. Ortega, S. Zvanovec, M-QAM signals transmission at the photonically generated K-band over thermal-induced turbulent FSO links with different turbulence distributions, Applied Optics, vol. 59, no. 16, pp. 4997-5005, 2020.
  • R. Ahmad, M. Komanec, S. Zvanovec, Mid-infrared supercontinuum generation in liquid-filled circular photonic crystal fiber, Journal of Nanophotonics, vol. 14, pp. 020016-1-16, 2020.
  • Z. Nazari Chaleshtori, A. Burton, S. Zvanovec, Z. Ghassemlooy, P. Chvojka, Comprehensive optical and electrical characterization and evaluation of organic light-emitting diodes for visible light communication, Optical Engineering, vol. 59, no.4, 2020
  • Z. Nazari Chaleshtori, S. Zvanovec, Z. Ghassemlooy, H. B. Eldeeb, M. Uysal, Coverage of a Shopping Mall with a Flexible OLED-based Visible Light Communications, Optics Express, vol. 28, no.7, pp. 10015-10026, 2020.
  • M.Ding, M. Komanec, D. Suslov, D. Dousek, S. Zvanovec, E.Numkam Fokoua, T.D. Bradley, F. Poletti, D.J. Richardson, R. Slavik, Long-length and environmentally stable high-finesse Fabry-Perot interferometers made of hollow core optical fiber, IEEE Journal of Lightwave Technology, vol. 38, no.8, pp. 2423-2427, 2020.
  • R. Priyadarshani, A. Jaiswal, M. R. Bhatnagar, J. Bohata, S. Zvanovec, Z. Ghassemlooy,  Impact of Channel Correlation on Different Performance Metrices of OSSK-Based FSO System,  IEEE Transactions on Wireless Communications, vol.19, issue. 3, pp. 1593-1609, 2020.
  • O. I. Younus, N. B. Hassan, Z. Ghassemlooy, P. A. Haigh, S. Zvanovec, L. N. Alves, H.L. Minh, Data Rate Enhancement in Optical Camera Communications using an Artificial Neural Network Equaliser, IEEE Access, vol. 8, pp. 42656 – 42665, 2020.
  • X. Li,  Z. Ghassemlooy, S. Zvanovec, R. Perez-Jimenez, P. A. Haigh,  Should Analogue Pre-equalisers be Avoided in VLC Systems?, IEEE Photonics Journal, vol. 12, no. 2, pp. 1-14, 2020.
  • D. Suslov, M. Komanec, T. Nemecek, J. Bohata, S. Zvanovec, Exact modeling of photonic crystal fibers for determination of fundamental properties, Optical Fiber Technology, vol. 56, pp. 1-6, 2020.
  • E. Eso, S. Teli, N. B. Hassan, S. Vitek, Z. Ghassemlooy, S. Zvanovec, A 400 m Rolling Shutter based Optical Camera Communications Link, Optics Letters, vol. 45, issue 5, pp. 1059-1062, 2020.
  • V. Matus, E. Eso, S. R. Teli, R. Perez-Jimenez, S. Zvanovec, Experimentally derived feasibility of optical camera communications under turbulence and fog conditions, SENSORS, vol. 20, pp.1-15, 2020.
  • L. Vallejo, B. Ortega, J. Bohata, S. Zvanovec, V. Almenar, Photonic multiple millimeter wave signal generation and distribution over reconfigurable hybrid SSMF/FSO links, Optical Fiber Technology, vol. 54, pp. 1-7, 2020.
  • L. Vallejo, M. Komanec, B. Ortega, J. Bohata, D.-N. Nguyen, S. Zvanovec, V. Almenar, Impact of thermal-induced turbulent distribution along FSO link on transmission of photonically generated mmW signals in the frequency range 26-40 GHz, IEEE Photonics Journal, vol. 12, no. 1, pp. 1-10, Feb. 2020
  • R. Priyadarshani, M. R. Bhatnagar, J. Bohata,  S. Zvanovec, Z. Ghassemlooy, Experimental and Analytical Investigation of an Optically Pre-amplified FSO-MIMO System with Repetition Coding over Non-Identically Distributed Correlated Channels, IEEE Access, vol. 8, pp. 1288-12203, 2020. 
  • D.-N. Nguyen, J. Bohata, M. Komanec, S. Zvanovec, B. Ortega, Z. Ghassemlooy, Seamless 25 GHz Transmission of LTE 4/16/64 QAM Signals over Hybrid SMF/FSO and Wireless Link, IEEE Journal of Lightwave Technology, vol. 37, issue 24, pp. 6040-6047, 2019.
  • M. Najla, P. Mach, Z. Becvar, P. Chvojka, S. Zvanovec, Efficient Exploitation of Radio Frequency and Visible Light Communication Bands for D2D in Mobile Networks, IEEE Acess, vol. 7, pp. 168922-168933, 2019.
  • N. B. Hassan,  Z. Ghassemlooy, S. Zvanovec,  M. Biaggi, A. M. Vegni, M. Zhang, Y. Huang, Interference Cancellation in MIMO NLOS Optical Camera Communication-based Intelligent Transport Systems, Applied Optics, vol. 58, no. 34. pp. 9384-9391, 2019.
  • ​D.-N. Nguyen, S. Zvanovec and Z. Ghassemlooy, Mitigation of Dispersion and Turbulence in Hybrid Optical Fibre and Free-Space Optics Links Links Using Electronic Equalisation, Optik,vol. 196., 2019.
  • D.-N. Nguyen, J. Bohata, J. Spacil, D. Dousek, S. Zvanovec, Z. Ghassemlooy, B. Ortega, M-QAM transmission over hybrid microwave photonic links at K-band, Optics Express, vol. 27, no. 23, pp. 33745-33756, 2019.
  • A. Burton, P.A. Haigh, P. Chvojka, Z. Ghassemlooy, S. Zvanovec, Filter-less WDM for Visible Light Communications using Coloured PAM, Optics Letters, vol. 44, issue. 19, pp. 4849-4852, 2019.
  • S. R. Teli, S. Zvanovec, Z. Ghassemlooy, Performance evaluation of neural network assisted motion detection schemes implemented within indoor optical camera based communications, Optics Express, vol. 27, issue 17, pp. 24082-24092, 2019.
  • N. A. M. Nor, M. Komanec, J. Bohata, Z. Ghassemlooy, M. R. Bhatnagar, S. Zvanovec, An Experimental All-Optical Relay-Assisted FSO Link with a Regeneration and Forward Scheme for Ultra-Short Pulse Transmission, Optics Express, vol. 27, issue. 16, pp. 22127-22137, 2019.  
  • F. M. Alsallami, Z. Ahmad, S. Zvanovec, P.A. Haigh, O. Haas, S. Rajbhandari, Indoor Intruder Tracking using Visible Light Communications, SENSORS, vol. 19, 4578, 2019.
  • P. Pesek, S. Zvanovec, P. Chvojka, Z. Ghassemlooy, N. A. M. Nor, P. Tabeshmehr, Experimental Validation of an Indoor Relay-assisted Visible Light Communications for the Last Meter Access Network, Optics Communications, vol. 451, pp. 319 – 322,2019.
  • N. A. M. Nor, Z. Ghassemlooy, S. Zvanovec, M. A. Khalighi, M. R. Bhatnagar, J. Bohata, M. Komanec, Experimental Analysis of a Triple-Hop Relay-Assisted FSO System with Turbulence, Optical Switching and Networking, vol. 33, pp. 194 -198, 2019.
  • N. B. Hassan,  Z. Ghassemlooy, S. Zvanovec, M. Biagi, A. M. Vegni, M. Zhang, P. Luo, Non-Line-of-Sight MIMO Space-Time Division Multiplexing Visible Light Optical Camera Communications, IEEE Journal of Lightwave Technology, vol. 37, no. 10, pp. 2409 – 2417. 2019.
  • M. Komanec, D. Suslov, S. Zvanovec, Y. Chen, T. Bradley, S. R. Sandoghchi, E. R. Numkam Fokoua, G. T. Jasion, M. N. Petrovich, F. Poletti, D. J. Richardson, R. Slavik, Low-Loss and Low-Back-Reflection Hollow-Core to Standard Fiber Interconnection,  IEEE Photonics Technology Letters, vol. 31, no. 10, pp. 723-726, 2019.
  • P. A. Haigh, P. Chvojka,  Z. Ghassemlooy, S. Zvanovec, I, Darwazeh, Visible Light Communications: Multi-band Super-Nyquist CAP Modulation, Optics Express,vol. 27, no.6, pp. 8912-8919, 2019
  • P. Pesek, S. Zvanovec, P. Chvojka, Z. Ghassemlooy, P. A. Haigh, Demonstration of a Hybrid FSO/VLC Link for the Last Mile and Last Meter Networks, IEEE Photonics Journal, vol. 11, no. 1, pp. 1-7, Feb. 2019
  • M. Komanec, T. Nemecek, M. Vidner, T. Martan, F. Lahodny, S. Zvanovec, Structurally-modified tapered optical fiber sensors for long-term detection of liquids, Optical Fiber Technology, vol. 47, pp. 187-191, 2019
  • P. Chavez-Burbano, S. Vitek, S. R. Teli, V. Guerra, J. Rabadan, R. Perez-Jimenez, S. Zvanovec, Optical Camera Communication System for Internet of Things based on Organic Light Emitting Diodes, Electronics Letters, vol. 55, issue 6, pp. 334-336, 2019.
  • P. A. Haigh, P. Chvojka, S. Zvanovec, Z. Ghassemlooy, I, Darwazeh, Analysis of Nyquist Pulse Shapes for Carrier-less Amplitude and Phase Modulation in Visible Light Communications,  IEEE Journal of Lightwave Technology, vol. 36, pp. 5023-5029, 2018.
  • J. Bohata, M. Komanec, J. Spacil, Z. Ghassemlooy, S. Zvanovec, R. Slavik, 24 – 26 GHz Radio over Fiber and Free Space Optics for 5G Systems, Optics Letters, vol. 43, no. 5, pp. 1035-1038, 2018.
  • P. Pesek, S. Zvanovec, P. Chvojka, Z. Ghassemlooy, M. R. Bhatnagar, P. Saxena, Mobile User Connectivity in Relay-assisted Visible Light Communication, SENSORS, vol. 18, pp. 1-16, 2018. 
  • P. Luo, M. Zhang, Z. Ghassemlooy, S. Zvanovec, S. Feng, P. Zhang, Undersampled-based Modulation Schemes for Optical Camera Communications, IEEE Communications Magazine, vol. 56, no.2, pp. 204-212, 2018 
  • K. Werfli, P. Chvojka, Z. Ghassemlooy, N. B. Hassan, S. Zvanovec, A. Burton, P. A. Haigh, M. R. Bhatnagar, Experimental Demonstration of High-Speed 4 × 4 Imaging Multi-CAP MIMO Visible Light Communications , IEEE Journal of Lightwave Technology, vol. 36., pp. 1944-1951, 2018.
  • N. B. Hassan,  Z. Ghassemlooy, S. Zvanovec, P. Luo, H. Le-Minh, Non-Line-of-Sight Indoor 2 x N Indoor Optical Camera Communications, Applied Optics, vol. 57, no. 7, pp. 144-149, 2018.
  • R. Priyadarshani, M. R. Bhatnagar, Z. Ghassemlooy, S. Zvanovec,  Outage Analysis of a SIMO FSO System over an Arbitrarily Correlated Μ-distributed Channel, IEEE Photonics Technology Letters, vol. 30, no. 2, pp. 141 -144, 2018.
  • R. Ahmad, M. Komanec, D. Suslov, S. Zvanovec, Modified Octagonal Photonic Crystal Fiber for Residual Dispersion Compensation over Telecommunication Bands, Radioengineering, vol. 27, no. 1, pp. 10-15, 2018.
  • M. M. Abadi, Z. Ghassemlooy, M. R. Bhatnagar, S. Zvanovec,  M. A. Khalighi, M.P.J. Lavery, Differential Signalling in Free-Space Optical Communication Systems, Applied Sciences,vol. 8, issue 6, p. 872, 2018.
  • T. Nemecek, M. Komanec, B. Nelsen, T. Martan, D. Suslov, P. Hartmann, S. Zvanovec,  Experimentally and Analytically Derived Generalized Model for the Detection of Liquids with Suspended-core Optical Fibers, Optical Fiber Technology, vol.45, pp. 295-299, 2018.
  • P. Chvojka, S. Vitek, S. Zvanovec, Z. Ghassemlooy, S. Rajbhandari, Analyses of Non-Line of Sight Visible Light Communications, Optical Engineering, vol. 56, no.11, pp. 116116-1 – 7, 2017.
  • Z. Ghassemlooy, W. O. Popoola, X. Tang, S. Zvanovec, S. Rajbhandari, Visible Light Communications – A Review, IEEE E-Letter of Multimedia Communications Technical Committee (MMTC) – Frontiers, vol. 12, no. 3, pp. 6-13, 2017.
  • P. Chvojka, K. Werfli, S. Zvanovec, P. A. Haigh, V. Hubata Vacek, P. Dvorak, P. Pesek, Z. Ghassemlooy , On the m-CAP Performance with Different Pulse Shaping Filters Parameters for Visible Light Communications , IEEE Photonics Journal, vol. 9, no. 5, 2017.
  • J. Bohata, S. Zvanovec, M. Komanec, J. Jaros, Z. Ghassemlooy, Adaptation of Transmitting Signals over Joint Aged Optical Fiber and Free Space Optical Network Under Harsh Environments, Optik, vol. 151, pp. 7-17, 2017.
  • R. Priyadarshani, M. R. Bhatnagar, Z. Ghassemlooy, S. Zvanovec, Effect of Correlation on BER Performance of FSO-MISO System with Repetition Coding over Gamma-Gamma Turbulence, Photonics Journal, vol.9, issue 5, 7906215, 2017.
  • S. Vitek, J. Libich, P. Luo, S. Zvanovec, Z. Ghassemlooy, N. B. Hassan, Influence of Camera Setting on Vehicle-to-vehicle VLC Employing Undersampled Phase Shift On-off Keying, Radioengineering, vol. 24, no. 4, pp. 946 – 953, 2017.
  • H. K. Al-Musawi, T. Cseh, J. Bohata, W. P. Ng, Z. Ghassemlooy, S. Zvanovec, E. Udvary, P. Pesek, 4G-LTE Signal Transmission for the Last-mile Access Network Using a Hybrid RoMMF-FSO System under Turbulence Effects, IEEE Journal of Lightwave Technology, vol. 33, Issue 17, pp.3758-3764, 2017
  • T. Martan, T. Nemecek, M. Komanec, R. Ahmad, S. Zvanovec, Refractometric Detection of Liquids Using Tapered Optical Fiber and Suspended Core Microstructured Fiber: A Comparison of Methods, Applied Optics, vol. 56, Issue 13, pp. 1-9, 2017.
  • J. Libich, J. Perez, S. Zvanovec, Z. Ghassemlooy, R. Nebuloni, C. Capsoni, Combined Effect of Turbulence and Urban Aerosol on Free Space Optical Links, Applied Optics, vol. 56, Issue 2, pp. 336-341, 2017.
  • J. Bohata, J. Jaros, S. Pisarik, S. Zvanovec, M. Komanec, Long-term PMD Evolution and Accelerated Aging in Old Optical Cables, IEEE Photonics Technology Letters, vol. 29, no. 5, pp.519-522, 2017. 
  • M. M. Abadi, Z. Ghassemlooy, S. Zvanovec, M. R. Bhatnagar, M. A. Khalighi, Y. Wu, Impact of Link Parameters and Channel Correlation on the Performance of FSO Systems with Differential Signalling Technique, Journal of Optical Communications and Networking, vol. 9, issue. 2, pp. 138-148, 2017.
  • N. A. M. Nor, Z. Ghassemlooy, J. Bohata, P. Saxena, M. Komanec, S. Zvanovec, M. R. Bhatnagar, M. A. Khalighi, Experimental Investigation of All-Optical Relay-Assisted 10 Gbps FSO Link over the Atmospheric Turbulence Channel, IEEE Journal of Lightwave Technology, vol. 35, issue 1, pp. 45-53, 2017. 
  • R. Ahmad, M. Komanec, S. Zvanovec, Circular Lattice Photonic Crystal Fiber for Mid-IR Supercontinuum Generation, IEEE Photonics Technology Letters, vol. 28, Issue 23, pp. 2736 – 2739, 2016.
  • M. R. Bhatnagar, Z. Ghassemlooy, S. Zvanovec, M. A. Khalighi, M. M. Abadi, Quantized Feedback Based Differential Signaling for Free-Space Optical Communication System, IEEE Transactions on Communications, vol. 64, no 12, pp. 5176-5188, 2016.
  • J. Bohata, S. Zvanovec, P. Pesek, T. Korinek, M. M. Abadi, Z. Ghassemlooy, Experimental Verification of LTE Radio Transmissions over Dual-polarization Combined Fibre and FSO Optical Infrastructure,  Applied Optics, vol. 55, Issue 8, pp. 2109-2116, 2016.
  • A. N. Castro Martinez, M. Komanec, T. Nemecek, S. Zvanovec, S. Khotiaintsev, Fiber Optic Refractometric Sensors Using a Semi-ellipsoidal Sensing Element,  Applied Optics, vol. 55, Issue 10, pp. 2574-2579, 2016.
  • M. M. Abadi, Z. Ghassemlooy, M. A. Khalighi, S. Zvanovec, M. Bhatnagar, FSO Detection Using Differential Signaling in Correlated Channels Condition, IEEE Photonics Technology Letters, vol.28, no.1, pp.55-58, 2016.
  • D. Wu, Z. Ghassemlooy, W. Zhong, M.A. Khalighi, H. L. Minh, Ch. Chen, S. Zvanovec, A.C. Boucouvalas,Effect of Optimal Lambertian Order for Cellular Indoor Optical
    Wireless Communication and Positioning Systems, Optical Engineering, vol. 55, no. 6, p. 066114-1 – 8, 2016.
  • M. M. Abadi,  Z. Ghassemlooy, S. Zvanovec, D. Smith, M. R. Bhatnagar, Y. Wu, Dual Purpose Antenna for Hybrid Free Space Optics/RF Communication Systems, IEEE Journal of Lightwave Technology, vol. 34, no. 14, pp. 3432-3439, 2016.
  • T. Nemecek, M. Komanec, T. Martan,  R. Ahmad, S. Zvanovec, Suspended-core microstructured fiber for refractometric detection of liquids, Applied Optics, vol. 54, no. 30, pp. 8899-8903, 2015.
  • P. A. Haigh, A. Burton,  K. Werfli, H. L. Minh, E. Bentley, P. Chvojka, W. O. Popoola,  I. Papakonstantinou, S. Zvánovec, A Multi-CAP Visible Light Communications System with 4.85 b/s/Hz Spectral Efficiency, IEEE Journal on Selected Areas in Communications, vol. 33, no.9, p. 1771-1779, 2015.
  • J. Bohata, S. Zvanovec, T. Korinek, M. Mansour Abadi, Z. Ghassemlooy, Characterization of Dual-polarization LTE Radio over a Free-space Optical Turbulence Channel,  Applied Optics, vol. 54, no. 23, p. 7082-7087, 2015.
  • P. A. Haigh, S. T. Le, S. Zvánovec, Z. Ghassemlooy, P. Luo, T. Xu, P. Chvojka, T. Kanesan, E. Giacoumidis, P. Canyelles-Pericas, H. L. Minh,  W. O. Popoola,  S. Rajbhandari, N.J. Doran, I. Papakonstantinou, I. Darwazeh, Multi-band Carrier-less Amplitude and Phase Modulation for Bandlimited Visible Light Communications Systems, IEEE Wireless Communications, vol. 22, no. 2, p. 2-9, 2015.
  • P. Chvojka, S. Zvanovec, P.A. Haigh, Z. Ghassemlooy, Channel Characteristics of Visible Light Communications within the Dynamic Indoor Environment, IEEE Journal of Lightwave Technology, vol. 33, p. 1719 – 1725, 2015.
  • J. Libich, M. Komanec, P. Pesek, S. Zvánovec, W. O. Popoola, Z. Ghassemlooy, Experimental Verification of All-optical Dual Hop 10 Gbit/s FSO Link under Turbulence Regimes, Optics Letters, vol. 40, no. 3, p. 391-394, 2015.
  • M. Komanec, T. Martan, T. Nemecek, S. Zvanovec, Multimode Fiber Tapers for Reproducible Refractometric Liquid Detection, Optical Engineering, vol. 54, no. 4, p. 047102.1-6, 2015.
  • S. Zvanovec, P. Chvojka, P. Haigh,  Z. Ghassemlooy, Visible Light Communications towards 5G. Radioengineering, vol. 24, no. 1, p. 1-9, 2015.
  • P. Dvorak, M. Mazanek, S. Zvanovec, Fire Emissivity Detection by Microwave Radiometer, IEEE Geoscience and Remote Sensing Letters, vol. 12, no. 11, p. 2306-2310, 2015.
  • J. Perez, S. Zvanovec, Z. Ghassemlooy, W. O. Popoola, Experimental characterization and mitigation of turbulence induced signal fades within an ad-hoc FSO network, Optics Express, vol. 22, no. 3, p. 3208-3218, 2014.
  • M. Pisarik, P. Peterka, S. Zvanovec, Y. Baravets,F. Todorov, I. Kasik, P. Honzatko, Fused fiber components for „eye-safe“ spectral region around 2 micrometers, Optical and Quantum Electronics, vol. 46, pp. 603-611, 2014.
  • J. Bohata, M. Pisarik, S. Zvanovec, P. Peterka, Reliability of Aircraft Multimode Optical Networks, Optical Engineering, vol. 53, no. 9, 096102, 2014.
  • M. Mudroch, S. Zvanovec, Artificial Neural Network Utilization for FSO Link Performance Estimation, Radioengineering, vol. 23, no. 1, p. 474-479, 2014.
  • S. Zvanovec, J. Perez, Z. Ghassemlooy, S. Rajbhandari, J. Libich, Route diversity analyses for free-space optical wireless links within turbulent scenarios, Optics Express,  vol. 21, Issue 6, pp. 7641-7650, 2013. 
  • P. Dvorak, M. Mazanek, S. Zvanovec, Short-term Prediction and Detection of Dynamic Atmospheric Phenomena by Microwave Radiometer. Radioengineering. 2012, vol. 21, no. 4, p. 1060-1066. ISSN 1210-2512.  
  • J. Libich, P. Dvorak, P. Piksa, S. Zvanovec, Correction of Thermal Deviations in Fabry-Perot Resonator Based Measurements of Specific Gases in MillimeterWave Bands. Radioengineering. 2012, vol. 21, no. 1, p. 459-463. ISSN 1210-2512.
  • J. Libich, S. Zvanovec, Influences of Turbulences in Near Vicinity of Buildings on Free Space Optical Links, IET Microwaves, Antennas & Propagation, 2011, vol. 5 , issue 9, p. 1039 – 1044.
  • S. Zvanovec, P. Pechac, Validation of Rain Spatial Classification for High Altitude Platform Systems, IEEE Transactions on Antennas and Propagation, 2011, vol. 59 , issue 7, p. 2746 – 2750.
  • P. Cerny, P. Piksa, S. Zvanovec, T. Korinek, V. Kabourek, Improved Axial Excitation of Fabry-Perot Resonator for High Resolution Spectroscopy Applications, Microwave and Optical Technology Letters. 2011, vol. 53, no. 11, p. 2456-2462. ISSN 0895-2477.
  • P. Piksa, S. Zvanovec, P. Cerný, Elliptic and Hyperbolic Dielectric Lens Antennas in mm-Waves. Radioengineering. 2011, vol. 20, no. 1, p. 270-275. ISSN 1210-2512.
  • M. Komanec, P. Honzatko, S. Zvanovec, Single-shot All-optical Sampling Oscilloscope Using a Polarization-maintaining Resonator for Pulse Replication, Microwave and Optical Technology Letters. 2010, vol. 52, no. 11, p. 2452-2456. ISSN 0895-2477.
  • S. Zvanovec, P. Cerny, P. Piksa, T. Korinek, P. Pechac, M. Mazanek, J. Varga, J. Koubek, S. Urban, The Use of the Fabry-Perot Interferometer for High Resolution Microwave Spectroscopy, Journal of Molecular Spectroscopy, 2009, vol. 256, no. 1, p. 141-145. ISSN 0022-2852
  • M. Polivka, M. Svanda, P. Hudec, S. Zvanovec, UHF Radiofrequency Identification of People in Indoor and Open Areas, IEEE Transactions on Microwave Theory and Techniques, 2009, vol. 57, no. 5, p. 1341-1347. ISSN 0018-9480.
  • S. Zvanovec, P. Pechac, Rain Spatial Classification for Availability Studies of Point-to-Multipoint Systems. IEEE Transactions on Antennas and Propagation. 2006, vol. 54, no. 12, s. 3789-3796. ISSN 0018-926X.
  • S. Zvanovec, P. Piksa, M. Mazanek, P. Pechac, A Study of Gas and Rain Propagation Effects at 48GHz for HAP Scenarios. EURASIP Journal on Wireless Communications and Networking [online]. 2008, vol. 5, no. 1, p. 1-7. Internet: http://www.hindawi.com/GetArticle.aspx?doi=10.1155/2008/734216. ISSN 1687-1499.5
  • R.Urban, S. Zvanovec, : Dispersion and Pulse Interferences Investigation for UWB Signal Propagation. Radioengineering. 2008, vol. 17, no. 3, p. 60-65. ISSN 1210-2512. on-line
  • S. Zvanovec, P. Pechac, M. Klepal, Wireless LAN Networks Design: Site Survey or Propagation Modeling?, Radioengineering. 2003, vol. 12, no. 4, s. 42-49. ISSN 1210-2512.
  • M. Valek, S. Zvanovec, P. Pechac, Indoor Propagation Measurement for Wireless Systems Operating in 2.45 GHz ISM Band. Radioengineering. 2002, vol. 11, no. 4, p. 48-52. ISSN 1210-2512.
  • P. Pechac, M. Klepal, S. Zvanovec, Results of Indoor Propagation Measurement Campaign at 1900 MHz. Radioengineering. 2001, vol. 10, no. 4, p. 2-4. ISSN 1210-2512.

 

Last update: 01-05-2020