Novel self-pulsating mechanism in laser diodes with wavelength constraints: dispersive self-gain-switching

Cheng Guan Lim; Stavros Iezekiel; Christopher M. Snowden

doi:10.1117/12.432623

9 July 2001 Novel self-pulsating mechanism in laser diodes with wavelength constraints: dispersive self-gain-switching

Cheng Guan Lim, Stavros Iezekiel, Christopher M. Snowden

Proceedings Volume 4283, Physics and Simulation of Optoelectronic Devices IX; (2001) https://doi.org/10.1117/12.432623
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

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.

Citation Download Citation

Cheng Guan Lim, Stavros Iezekiel, and Christopher M. Snowden "Novel self-pulsating mechanism in laser diodes with wavelength constraints: dispersive self-gain-switching", Proc. SPIE 4283, Physics and Simulation of Optoelectronic Devices IX, (9 July 2001); https://doi.org/10.1117/12.432623

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