Journal ArticleDOI
Unidirectional bistability in semiconductor waveguide ring lasers
TLDR
In this paper, a large diameter ridge-guided semiconductor laser weakly coupled to a straight output waveguide showed unidirectional operation and directional bistability at currents up to about twice the threshold.Abstract:
Large-diameter ridge-guided semiconductor lasers weakly coupled to a straight output waveguide show unidirectional operation and directional bistability at currents up to about twice the threshold. The direction of lasing in the ring may be controlled by biasing contacts at either end of the coupled guide.read more
Citations
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Journal ArticleDOI
Operating regimes of GaAs-AlGaAs semiconductor ring lasers: experiment and model
TL;DR: In this article, a model based on a mean field approach for the two counter-propagating modes is proposed to study the semiconductor ring laser dynamics, and the authors obtain good numerical agreement between experiment and theory, and also an estimation for the otherwise unknown scattering parameters.
Journal ArticleDOI
Advances and prospects for whispering gallery mode microcavities
TL;DR: The whispering gallery mode (WGM) microcavities and microlasers exhibit outstanding optical performances with high quality factors and small mode volumes, thus ensuring low lasing thresholds as discussed by the authors.
Patent
Semiconductor light emitting element
Satoshi Kamiyama,Motoaki Iwaya,Hiroshi Amano,Isamu Akasaki,Toshiyuki Kondo,Fumiharu Teramae,Tsukasa Kitano,Atsushi Suzuki +7 more
TL;DR: In this paper, a semiconductor light-emitting element, consisting of a first light emitting part, a second light emitting part, and a third light emitting element, was presented.
Journal ArticleDOI
Electrically-pumped compact hybrid silicon microring lasers for optical interconnects.
Di Liang,Marco Fiorentino,Tadashi Okumura,Hsu-Hao Chang,Daryl T. Spencer,Ying-Hao Kuo,Alexander W. Fang,Daoxin Dai,Raymond G. Beausoleil,John E. Bowers +9 more
TL;DR: An electrically-pumped hybrid silicon microring laser fabricated by a self-aligned process with compact structure and small electrical and optical losses is demonstrated and application as on-chip optical interconnects is discussed.
Journal ArticleDOI
Alternate oscillations in semiconductor ring lasers
Marc Sorel,P.J.R. Laybourn,Alessandro Scirè,Salvador Balle,Guido Giuliani,R. Miglierina,Silvano Donati +6 more
TL;DR: A bifurcation from bidirectional stable operation to a regime with alternate oscillations of the counterpropagating modes was observed experimentally and is theoretically explained through a two-mode model.
References
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Journal ArticleDOI
Unidirectional operation in a semiconductor ring diode laser
TL;DR: In this paper, the first demonstration of a unidirectional ring diode laser based on the use of an active crossover waveguide is reported, where the waveguide introduces both a non-reciprocal loss and gain into the ring cavity to promote the clockwise ring direction, and up to 95% of the continuous-wave lasing output of 3.5 mW at 150 mA ring current is emitted from this preferred lasing direction.
Journal ArticleDOI
Unidirectional operation of waveguide diode ring lasers
TL;DR: In this paper, a method of providing asymmetric feedback in the triangular ring laser structure was devised through simple alterations of the waveguide shape, and two kinds of alterations were designed and implemented, one being the "optical diode" and the other being the tapered waveguide.
Journal ArticleDOI
Theory of a multimode quasiequilibrium semiconductor laser.
TL;DR: A simple plane-wave multimode semiconductor-laser theory valid near threshold under the quasiequilibrium assumption that the total field envelope varies little in the intraband scattering times is given.
Journal ArticleDOI
Impact of output coupler configuration on operating characteristics of semiconductor ring lasers
TL;DR: In this article, the authors investigated semiconductor (GaAs/AlGaAs) ring lasers with three different types of output coupler in order to identify the influence of the coupling geometry on the performance of such lasers.
Journal ArticleDOI
Spatial beam switching and bistability in a diode ring laser
TL;DR: In this article, the authors report bistable switching of the output direction in certain triangular diode ring laser systems at large drive currents, with up to 98% of output power emerging from either the clockwise or the counterclockwise direction.