Abstract
Crystals of Yttrium-Aluminum garnet (Y3Al5O12), known as YAG represent the base of a large number of solid-state lasers. Interest in the Er-doped YAG crystal has been shown already in the 1970’s for its possible use as a laser for medical applications. Since our bodies are composed mostly of water, the absorption of light by water is a fundamental consideration for medical lasers. The peak absorption of water is in the region of 3 μm. Since the Er: YAG laser emits a wavelength of 2.94 μm, it’s very interesting for medicine and biology. Measurements of the transient radial temperature profile of the Er: YAG rod during flash lamp pumping are reported.
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