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CTTC Weekly Seminar Series: Silicon Microwave Photonics for Radio-over-Fibre – Design and Measurement Issues

  • Title: "Silicon Microwave Photonics for Radio-over-Fibre – Design and Measurement Issues"
  • Speaker:  Stavros Iezekiel, Ph.D.
  • Affiliation: Chair of the Dept. of Electrical and Computer Engineering, University of Cyprus
Editor of "Microwave Photonics: Devices & Applications", published by Wiley
Editor-in-Chief of "IET Microwaves, Antennas and Propagation"
  • Place: CTTC Room Auditorium
  • Date & Time: 22th March (Friday) - 10:00h
  • Duration: 45min. (aprox.)

An abstract of the presentation and a short CV of the speaker follow.

Speaker: Stavros Iezekiel received the B.Eng. and Ph.D. degrees in electronic and electrical engineering from the University of Leeds, U.K. From 1991 to 1993, he worked in conjunction with M/A-COM on the development of high-speed photonic multichip modules. From 1993 to 2006, he was a Member of Academic Staff at the University of Leeds, where he led research activity in microwave photonics and developed a new degree program in photonics sponsored by Agilent Technologies. At Leeds, he was Deputy Director of the Institute of Microwaves and Photonics and also Director of Learning and Teaching. He joined the Department of Electrical and Computer Engineering, University of Cyprus, in 2006, where he is now the Head of Department. His research interests are in the general area of microwave photonics. He has edited a book in this field ("Microwave Photonics", Wiley, 2009). Dr. Iezekiel received the 1999 Institution of Electrical Engineers Measurement Prize for his work on lightwave network analysis. He has organized several IEEE events and was the Membership Development Officer for the IEEE UKRI Section. In 2009, he became the Editor-in-Chief of IET Microwaves, Antennas and Propagation, and he is also a member of the IEEE Microwave Theory and Techniques Speakers Bureau. 

Abstract: Optical fibre is an excellent transmission medium - it has very low loss and very large bandwidth (especially when compared with microwave transmission media). In addition, it is possible to modulate light at several tens of GHz and then recover that modulation. Hence there has been much interest in the use of optical fibre for the transmission and processing of RF signals. Such links are analogue in nature, and issues of conversion efficiency, noise figure, nonlinearity and dynamic range are important in link design. In this talk, we will show how compact optical filters based on silicon nitride technology can be used to improve the performance of analogue microwave fibre-optic links through techniques such as carrier suppression and sideband filtering. Design issues associated with ring-resonator structures will be discussed. Experimental results for radio-over-fibre links using fixed extinction ratio ring-resonators and variable extinction ratio Mach-Zehnder based structures will be provided. These will highlight some of the techniques which are available for the measurement of radio-over-fibre links. The emphasis will be on extending microwave network analyser techniques to these devices. Issues associated with polarization effects, optical cavity resonances and nonlinearity will be discussed.
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