Abstract

This paper proposes a method of determining the temperature of an external object from the optical absorption in a solid-state sample cooled by laser radiation. A system of kinetic equations is obtained that describes the process of laser cooling of an impurity-containing solid body and its solution in the high-temperature approximation. An expression is obtained for the final cooling temperature of the sample in terms of the temperature of the vacuum chamber that surrounds it, which can be thermally coupled with the external sample. It is shown that, by measuring the absorption coefficient of the pump radiation in the process of laser cooling, it is possible to determine the temperature of the cooled sample, and consequently the temperature of the external object.

© 2007 Optical Society of America

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