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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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Proceedings Article
Electrically pumped continuous-wave III–V quantum dot lasers monolithically grown on silicon
Siming Chen,Jiang Wu,Wei Li,Mengya Liao,Mingchu Tang,Qi Jiang,Samuel Shutts,Stella N. Elliott,Angela Sobiesierski,Ian M. Ross,Peter Michael Smowton,Alwyn J. Seeds,Huiyun Liu +12 more
TL;DR: In this article, the authors demonstrate electrically pumped continuous-wave InAs/GaAs quantum dot lasers monolithically grown on silicon substrates with a low threshold current density of 62.5 Acm−2, a room temperature output exceeding 105 mW, operation up to 120 °C, and long extrapolated lifetime exceeding 100,000 h.
Opto-electronic mixers.
TL;DR: Tunnelling non-linearity in a specially fabricated Schottky-N** plus diode is used to down-convert an electrical signal using an intensity modulated optical local oscillator signal.
Broadband wireless access using millimetre-wave overfibre systems
TL;DR: Techniques for providing broadband wireless access using millimetre-wave over fibre systems using optical phase lock loop techniques and in signal detection using optically controlled heterojunction phototransistors are reviewed.
Patent
Nitrogen implanted ultrafast sampling switch
Chris Graham,Alwyn J. Seeds +1 more
TL;DR: In this paper, a method of manufacturing a semiconductor device suitable for optoelectronic switching in response to light of wavelengths in the range 1200 nm to 1600 nm, comprising forming an undoped InGaAs layer on an insulative semiconductor substrate and bonded on opposed sides to a pair of electrical contact layers adapted to constitute the electrodes of a switch, was proposed.
Proceedings Article
100 GHz Spaced 10 Gbit/s WDM over 10 oC to 70 oC Using an Uncooled DBR Laser
Cyril C. Renaud,Martyn J. Fice,Ian Francis Lealman,P. J. Cannard,Lesley Rivers,Alwyn J. Seeds +5 more
TL;DR: In this paper, an uncooled DBR laser was used for WDM transmission at 2 GHz from 10 oC to 70 oC using a predicting algorithm, and the wavelength of the laser was stabilised within 2 GHz.