UNIVERSITY COLLEGE LONDON (UCL)
Short description of the participating partner organization
UCL’s role in the project is to contribute to the source development activities in WP3 from its experience on dual-mode and mode-locked sources, to contribute to the design of ultra-fast UTC photodiodes including the design of integrated antenna devices in WP4, drawing on its world record output power THz detectors, and to work on locking techniques for the integrated sources of WP5 based on its pioneering work on optical phase lock loops (OPLL).
The Photonics Group at UCL, headed by Professor A. J. Seeds, has an internationally leading reputation in ultra-fast and microwave photonics. The activities of the Group have ranged from optoelectronic device physics and fabrication to long-haul optical communication experiments. The group has received funding in excess of £5 M in grants and donated equipment and published over 300 papers in the last 5 years. The Group has been a partner in a number of European Union projects including IST ATLAS and NEFERTITI, FP6 GANDALF and e-Photon/ONe.
Relevant research has included the development of the first tunneling optoelectronic mixers, the first optically pumped HBT mixers and the first QCSE tuned semiconductor lasers and optical comb-generators. In recent work we have designed and realized, using fabrication techniques developed for the project by the Center for Integrated Photonics (CIP), the first distributed travelling wave uni-travelling carrier (UTC) photodiodes, which offer record combinations of bandwidth and responsivity (0.2 A/W, -3 dB electrical bandwidth > 108 GHz) at 1,550 nm wavelength. We have integrated these with THz antennas and have recently demonstrated record continuous wave (CW) output (> 0.1 mW) at a frequency of 455 GHz.
In sub-systems work the Group was the first to demonstrate an OPLL using non line-narrowed semiconductor lasers and invented the optical injection phase lock loop (OIPLL).
Primary Contact Person
Prof. Dr. Alwyn Seeds
UNIVERSITY COLLEGE LONDON
Gower Street
WC1E 6BT London
GB
Phone: +44 20 7679 7928
Fax: +44 20 7388 9325
E-Mail: click here
Short description of the participants (in alphabetical order)
Cyril Renaud worked at the Labarotoire Kastler-Brossel of the Ecole Normale Superieure in Paris and received the Ph.D. degree in 2001 from the University of Southampton for work on high power fiber lasers. Since then he has been working at UCL on optical frequency synthesis and THz photo-detectors. He holds two patents in these areas. His current research interests include ultra-fast tuneable semiconductor lasers, semiconductor optical modulators, optical control of microwave devices, mode-locked lasers, optical phase-lock loops and optical frequency synthesis. In recent collaborative work with NTT carried out at UCL, the he has demonstrated the generation of record spectrally pure power levels direct from UTC photo-detectors at frequencies exceeding 110 GHz [S Fukushima et al, Jnl. Lightwave Technol., 21, 3043-51 (2003)].
Alwyn Seeds, FIEE, FIEEE, FREng is now Professor of Optoelectronics in the University of London and Head of the Photonics Group at UCL. He has published over 200 papers on microwave and optoelectronic devices and their systems applications, of which some 45 have been invited. His current research interests include ultra-fast and THz photonics, optical frequency synthesis, broadband wireless over fiber access systems, dense WDM networks and nonlinear processing in optical transmission. Professor Seeds is Chairman of the IEE Photonics Professional Network, a member of the IEEE-LEOS Microwave Photonics Committee, a past Distinguished Lecturer of the IEEE Microwave Theory and Techniques Society and past Chairman of its Technical Committee on Microwave Photonics. He has been a special issue editor for IEE Proceedings, IEEE Transactions on Microwave Theory and Techniques, IEEE/OSA Journal of lightwave Technology and IEEE Journal of Selected Topics in Quantum Electronics. He has served on the program committees and as a Conference Chairman for many international conferences.
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