Infrared and Optical Masers

Author(s): A. L. Schawlow and C. H. Townes
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 wav…
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[Phys. Rev. 112, 1940] Published Mon Dec 15, 1958