Abstract
The temperature dependence of solar-pumped solid state lasers of Nd:YAG and two types of Nd:Cr:GSGG was studied over the temperature range of +30 to -60°C in a quasi-cw mode. All lasers had higher output powers at -40°C. The Nd:Cr:GSGG laser with a chromium concentration of 2.5 at. % produced 70 W of power at -40°C, quasi-cw. If extrapolated to true cw operation this is equivalent to 350 W. The temperature dependence of the laser performance is attributed to changes in both the stimulated emission cross section and the resonator configuration.
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