Abstract

A serious problem with conventional grating-tuned external-cavity lasers1 is their sensitivity to angular misalignment of the grating. While rotation of the grating about an axis parallel to the rulings tunes the laser output, a small rotation about an axis perpendicular to the rulings misaligns the external cavity. We describe an alignment-stablized degenerate external-cavity semiconductor laser tuned with an interference filter.

© 1988 Optical Society of America

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