Abstract
Increases in the catastrophic optical mirror damage (COMD) threshold in high power coated semiconductor laser diodes have been theoretically attributed to reducing the optical intensity at the semiconductor/dielectric coating interface. Traditionally, this work has focused on the anti- reflection (AR) facet as this is assumed to have to withstand the highest optical intensity.We have carried out a study of the effect of the optical standing wave intensity at the semiconductor/dielectric interface on COMD at the HR facet. This has been done by means of an elegant experiment in which lasers were made with HR dielectric coatings on both facets. This type of laser has a very high optical intensity trapped in the optical cavity, and hence a high optical stress can be created in the facet regions.
Published Version
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