Title :
Experimental observation of the effect of laser standing wave pattern on the Catastrophic Optical Mirror Damage threshold for high-power single mode laser diodes.
Author :
Silver, M. ; Hill, S. ; Masterton, G. ; McDougall, S.D.
Author_Institution :
Hamilton Int. Technol. Park, Intense Ltd., Glasgow
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.
Keywords :
laser beam effects; laser beams; laser mirrors; mirrors; optical films; semiconductor lasers; COMD; HR dielectric coatings; catastrophic optical mirror damage threshold; laser standing wave pattern effect; optical stress; optical trap; semiconductor/dielectric interface; single mode laser diodes; Charge carrier processes; Coatings; Dielectrics; Diode lasers; Laser modes; Laser theory; Mirrors; Optical reflection; Semiconductor lasers; Stress;
Conference_Titel :
IEEE Lasers and Electro-Optics Society, 2008. LEOS 2008. 21st Annual Meeting of the
Conference_Location :
Acapulco
Print_ISBN :
978-1-4244-1931-9
Electronic_ISBN :
978-1-4244-1932-6
DOI :
10.1109/LEOS.2008.4688912
