A
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
More filters
Proceedings ArticleDOI
Multi-octave photonic RF synthesiser based on two DFB lasers
Leif A. Johansson,Alwyn J. Seeds +1 more
TL;DR: In this article, multi-octave photonic synthesis of high purity RF signals was demonstrated in a setup based around two DFB lasers using a 4 GHz to 14 GHz reference.
Proceedings ArticleDOI
Two-section integrated quantum-confined Stark effect tuned laser with uniform frequency modulation response from 30 kHz to 6 GHz
TL;DR: In this paper, the authors reported the first post-growth band-gap engineered, quantum-confined Stark effect (QCSE) tuned two-section ridge waveguide GaAs-AlGaAs MQW laser having the widest and most uniform frequency modulation bandwidth (30 kHz to 6 GHz/spl plusmn/3 dB) yet reported for field effect tuned lasers.
Proceedings ArticleDOI
Integrating III-V quantum dot lasers on silicon substrates for silicon photonics
Mengya Liao,Siming Chen,Mingchu Tang,Jiang Wu,Wei Li,Kenneth Kennedy,Ian M. Ross,Alwyn J. Seeds,Huiyun Liu +8 more
TL;DR: In this article, the InGaAs/GaAs DFLs were optimized to suppress the threading dislocation (TD) density generated at the interface between III-V compounds and Si substrates to achieve a high performance electrically pumped QD laser on a Si substrate with threshold current density of 62.5 A cm-2.
Posted Content
Electrically-Pumped Continuous-Wave Quantum-Dot Distributed Feedback Laser Array on Silicon
Yi Wang,Siming Chen,Ying Yu,Lidan Zhou,Lin Liu,Chunchuan Yang,Mengya Liao,Mingchu Tang,Zizhuo Liu,Jiang Wu,Alwyn J. Seeds,Wei Li,Ian M. Ross,Huiyun Liu,Siyuan Yu +14 more
TL;DR: In this article, an epitaxially grown silicon-based laser array with a record wavelength covering range of 100 nm is presented, with an accurate channel spacing of 20$\pm$0.2 nm.
Journal ArticleDOI
Optimisation of 1.3-μm InAs/GaAs Quantum-Dot Lasers Monolithically Grown on Si Substrates
TL;DR: In this article, a 1.3-μm InAs/GaAs quantum dot laser was grown on Si substrates by molecular beam epitaxy, which includes the nucleation layers and the dislocation filter layers.