Improved semiconductor-laser dynamics from induced population pulsation

TitleImproved semiconductor-laser dynamics from induced population pulsation
Publication TypeJournal Article
Year of Publication2006
AuthorsWieczorek, S., W. W. Chow, L. Chrostowski, and C. J. Chang-Hasnain
JournalQuantum Electronics, IEEE Journal of
Pagination552 - 562
Date Publishedjun.
Keywordsbandwidth enhancement, cavity resonances, induced population pulsation, injected-laser rate-equations, Injection locking, intracavity field, laser cavity resonators, laser theory, optical modulation, population pulsation effects, relaxation oscillations, Semiconductor lasers, semiconductor-laser dynamics, surface emitting lasers, undamping, vertical-cavity surface-emitting lasers

This paper investigates theoretically the modification of dynamical properties in a semiconductor laser by a strong injected signal. It is found that enhanced relaxation oscillations are governed by the pulsations of the intracavity field and population at frequencies determined by the injected field and cavity resonances. Furthermore, the bandwidth enhancement is associated with the undamping of the injection-induced relaxation oscillation and strong population pulsation effects. There are two limitations to the modulation-bandwidth enhancement: Overdamping of relaxation oscillation and degradation of flat response at low frequencies. The injected-laser rate-equations used in the investigation reproduce the relevant aspects of modulation-bandwidth enhancement found in the experiment on injection-locked vertical-cavity surface-emitting lasers.


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