Abstract

Required operating wavelengths in GaAs injection lasers have generally determined the operating temperature, preventing the use of optimum refrigeration systems. Recent advances in GaAlAs injection lasers have produced high efficiency lasers with selectable wavelengths from 0.8 μm to 0.9 μm. This paper discusses the refrigeration considerations for GaAlAs lasers. The basis for selecting the thermoelectric refrigerator is presented and the solution of the optical–electronic interface problems are discussed. Finally, the actual design and performance characteristics of the individual laser arrays and a thermoelectrically cooled, GaAlAs illuminator are described.

© 1970 Optical Society of America

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