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Single-longitudinal-mode operation from a semiconductor laser array via feedback from a modified collimating objective

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Abstract

A technique for obtaining single-longitudinal-mode collimated output from a ten-stripe laser diode array using feedback from a single modified microscope objective is described. An optimum main mode to side mode ratio of 14 dB is obtained for a feedback reflectivity of 10%.

© 1990 Optical Society of America

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