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Proceedings Paper

Novel self-pulsating mechanism in laser diodes with wavelength constraints: dispersive self-gain-switching
Author(s): Cheng Guan Lim; Stavros Iezekiel; Christopher M. Snowden
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Paper Abstract

A novel single-moded self-sustained pulsation mechanism suitable for single-section long-wavelength semiconductor lasers with wavelength constraints is proposed. It is based on the principles of gain-switching and the dispersive property of the active layer in laser diodes (LDs). Numerical simulations using a carrier heating model illustrate the mechanism. Results indicate that if a LD is engineered such that its lasing wavelength, over a range of bias currents, experiences an optical gain that is slightly above threshold, self-gain-switching occurs giving rise to self-pulsations. The self-gain-switching is brought about by wavelength shifting due to index-change induced by carrier density fluctuations and current heating. Depending on the magnitude of the bias current the self-pulsating waveform can be sinusoidal or pulse-like.

Paper Details

Date Published: 9 July 2001
PDF: 7 pages
Proc. SPIE 4283, Physics and Simulation of Optoelectronic Devices IX, (9 July 2001); doi: 10.1117/12.432623
Show Author Affiliations
Cheng Guan Lim, Univ. of Leeds (United Kingdom)
Stavros Iezekiel, Univ. of Leeds (United Kingdom)
Christopher M. Snowden, Univ. of Leeds (United Kingdom)

Published in SPIE Proceedings Vol. 4283:
Physics and Simulation of Optoelectronic Devices IX
Yasuhiko Arakawa; Peter Blood; Marek Osinski, Editor(s)

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