Mirror degradation in AlGaAs double-heterostructure lasers
- 1 August 1979
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 50 (8) , 5150-5157
- https://doi.org/10.1063/1.326650
Abstract
Degradation mechanism and the related change in lasing characteristics for a mirror degradation were investigated in AlGaAs double‐heterostructure lasers with uncoated mirror surfaces. In constant optical‐power operation, mirror degradation was classified into three phases. The lasing‐characteristics degradation in the initial stage of phase I was well explained in the excitation‐enhanced oxidation model. Dark‐line defects, originating from mirror surfaces, were found in the final stage of phase III, following phase II with a low degradation rate. The mechanism of the optical‐power dependence was also investigated. Marked improvement in operating life was confirmed by the dielectric film coating and in a new‐structure laser with little excitation in the vicinity of mirror surfaces.This publication has 28 references indexed in Scilit:
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