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Alwyn J. Seeds
Researcher at University College London
Publications - 466
Citations - 12674
Alwyn J. Seeds is an academic researcher from University College London. The author has contributed to research in topics: Laser & Photonics. The author has an hindex of 50, co-authored 454 publications receiving 11208 citations. Previous affiliations of Alwyn J. Seeds include Alcan & Queen Mary University of London.
Papers
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Journal ArticleDOI
High-speed photodiodes for InP-based photonic integrated circuits.
Efthymios Rouvalis,Mourad Chtioui,Michael Tran,Francois Lelarge,F. van Dijk,Martyn J. Fice,Cyril C. Renaud,Guillermo Carpintero,Alwyn J. Seeds +8 more
TL;DR: This platform is suitable for active-passive, butt-joint monolithic integration with various Multiple Quantum Well (MQW) devices for narrow linewidth millimeter-wave photomixing sources.
Patent
An optical communication system for wireless radio signals
TL;DR: In this paper, a method of transmission of radio signals over all types of graded-index multimode fiber is provided, which comprises launching optical radiation into the core of the multimode fibre away from the center of the core so as to strongly excite a subset of the available modes of the multi-modal fiber.
Journal ArticleDOI
Increased amplifier spacing in a soliton system with quantum-well saturable absorbers and spectral filtering.
David Atkinson,W.H. Loh,V.V. Afanasjev,Anatoly Borisovich Grudinin,Alwyn J. Seeds,David N. Payne +5 more
TL;DR: The spacing between optical amplifiers in a long-haul soliton system may be increased to 100 km by using only passive quantum-well saturable absorbers and narrow-band filters for soliton control.
Journal ArticleDOI
Homodyne Coherent Optical Receiver Using an Optical Injection Phase-Lock Loop
TL;DR: In this paper, a synchronous homodyne coherent optical receiver based on an optical phase-locking scheme that combines optical injection locking of the semiconductor laser local oscillator (LO) with low-speed electronic feedback to give both a large locking bandwidth and a wide tracking range is presented.
Journal ArticleDOI
Optical injection locking of monolithically integrated photonic source for generation of high purity signals above 100 GHz
Katarzyna Balakier,Martyn J. Fice,Frederic van Dijk,Gael Kervella,Guillermo Carpintero,Alwyn J. Seeds,Cyril C. Renaud +6 more
TL;DR: A monolithically integrated photonic source for tuneable mm-wave signal generation has been fabricated and high-spectral-purity signals at frequencies >100 GHz have been generated by optically injection locking the integrated lasers to an external optical comb source.