Alliedsignal Inc.

Allied Corporation

Margaret N Long

Donald F Heller

Robert C Morris

Bruce H Chai

Timothy C Chin

Shui T Lai

A broadly wavelength-tunable laser is provided which comprises as the laser medium a single crystal of MBO.sub.3 :Cr.sup.3+, where M is selected from the group of Sc, In and Lu. The laser may be operated over a broad temperature range from cryogenic temperatures to elevated temperatures. Emission is in a spectral range from red to infrared, and the laser is useful in the fields of defense, communications, isotope separation, photochemistry, etc.

Cr-doped scandium borate laser

A single crystal of rare-earth-doped lanthanum beryllate, whose crystal orientation is suitably chosen, provides a laser medium whose index of refraction is substantially independent of temperature. A laser using such a crystal as the laser medium displays little or no thermal lensing, thus permitting high power operation without wavefront distortion.

Thermal lensing-compensated lanthanum beryllate laser

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Landing, NJ, United States of America

Margaret N Long