Abstract

Recently, a new class of index-guided diode laser arrays has been reported1 which shows sig- niticant promise for stable fundamental-mode operation at high power. These devices are distinguished primarily by their large index step for defining the individual waveguides (0.05) and their operation on a class of modes which have been termed leaky modes due to their tendency toward excessive radiation loss. To date a few such devices have been fabricated,13־ and theoretical work has begun.3 Many unanswered questions remain, however, concerning the operation of these devices, particularly with regard to their mode selectivity at high power levels.

© 1989 Optical Society of America

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