Relaxation characteristics of quantum-dash-based semiconductor lasers

Erneux, Thomas; Viktorov, Evgeny A.; Mandel, Paul; Azouigui, Sheherazade; Ramdane, Abderrahim
December 2009
Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p231107
Academic Journal
We analyze the relaxation dynamics of quantum dot/dash lasers in terms of the energy exchange between the ground state and the wetting layer. We consider the case where both capture and escape times are of the same order of magnitude and determine the relaxation oscillation frequency and its damping rate. We show that the escape process may significantly affect the modulation characteristics and the tolerance to optical feedback.


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