Monte Carlo markovian modeling of modal competition in dual-wavelength semiconductor lasers
2014
Monte Carlo markovian models of a dual-mode semiconductor laser with quantum well (QW) or quantum dot
(QD) active regions are proposed. Accounting for carriers and photons as particles that may exchange energy in
the course of time allows an ab initio description of laser dynamics such as the mode competition and intrinsic
laser noise. We used these models to evaluate the stability of the dual-mode regime when laser characteristics
are varied: mode gains and losses, non-radiative recombination rates, intraband relaxation time, capture time in
QD, transfer of excitation between QD via the wetting layer. . . As a major result, a possible steady-sate dualmode
regime is predicted for specially designed QD semiconductor lasers thereby acting as a CW microwave or
terahertz-beating source whereas it does not occur for QW lasers.
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