POWER-SCALABLE CRYOGENIC OPTICAL REFRIGERATOR
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United States of America
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Nov 14, 2024
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Jul 5, 2023
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Jul 5, 2023
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Abstract
A pumping scheme and cryo-cooler design for cryogenic optical refrigeration is described, which is power scalable, alignment free, and optimized for the use of low brightness, highly divergent diode laser sources. Such highly divergent pump beams are employed in order to drastically suppress potential nonlinearities (such as absorption saturation, self-focusing, and stimulation emission) that have thus far prevented power scaling in such devices. This promises lower cost, simpler, more compact, more energy efficient, and more reliable vibration free optical (cryo-) coolers. This cooler design can also be implemented using high-brightness pumps (such as fiber lasers) by adjusting the divergence of the beam.
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