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Anomalous longitudinal mode hops in GaAs/AlGaAs distributed Bragg reflector lasers
Auteur(s)
Zappe, H. P.
Date de parution
1997
In
Applied Physics Letters, American Institute of Physics (AIP), 1997/71//181-183
Résumé
We investigate normal and anomalous longitudinal mode hops in GaAs/AlGaAs-based distributed Bragg reflector (DBR) lasers; anomalous mode hops are defined as those which move toward shorter wavelengths with increasing temperature, which is unexpected. The two-section DBR lasers discussed in this letter, consisting of a gain section and an unpumped Bragg reflector, typically exhibit one mode hop in a 10 K temperature range. Although the longer wavelength modes are expected to start lasing when raising device temperature, occasional mode hops to a shorter wavelength are seen. We derive a model for temperature-dependent wavelength tuning, with which the overheating of the gain section is described empirically. This model allows an accurate numerical simulation of both kinds of temperature-induced longitudinal mode hops.
Identifiants
Type de publication
journal article
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