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Sun-pumped lasers: revisiting an old problem with nonimaging optics

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Abstract

The techniques of nonimaging optics have permitted the production of a world-record intensity of sunlight, 72 W/mm2, by using a sapphire concentrator. Such an intensity exceeds the intensity of light at the surface of the Sun itself (63 W/mm2) by 15% and may have useful applications in pumping lasers, which require high intensities of light to function. The author describes the production of high-intensity sunlight and reports its application in generating over 3 W of laser power from a 72.5-cm-diameter telescope mirror at an efficiency exceeding that typically attained in approaches not involving nonimaging optics.

© 1992 Optical Society of America

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