Infrared and optical masers

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Abstract

The extension of maser techniques to the infrared and optical region is considered. It is shown that by using a resonant cavity of centimeter dimensions, having many resonant modes, maser oscillation at these wavelengths can be achieved by pumping with reasonable amounts of incoherent light. For wavelengths much shorter than those of the ultraviolet region, maser-type amplification appears to be quite impractical. Although use of a multimode cavity is suggested, a single mode may be selected by making only the end walls highly reflecting, and defining a suitably small angular aperture. Then extremely monochromatic and coherent light is produced. The design principles are illustrated by reference to a system using potassium vapor. © 1958 The American Physical Society.

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APA

Schawlow, A. L., & Townes, C. H. (1958). Infrared and optical masers. Physical Review, 112(6), 1940–1949. https://doi.org/10.1103/PhysRev.112.1940

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