NASA NTRS · 19890045455
Thulium YAG laser operation at 2.01 microns
Abstract
Variable temperature laser experiments were performed with two compositions of Tm:Cr:YAG (5.0:1.0 and 1.5:2.0 percent substitutions), with special attention given to the spectroscopic details of energy transfer and quasi-3 level lasing. Differences in laser threshold and flashlamp degradation were found in lasing the two compositions, and it is suggested that the difference is due to the 1.5:2.0 rod having much less efficient energy transfer than the 5.0:1.0 Tm:Cr crystals. To first order, the thermal occupation factor is found to dominate laser threshold determination at temperatures betwen 120 and 240 K.
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Storm, Mark E., Gettemy, Donald J., Barnes, Norman P., Cross, Patricia L., Kokta, Milan R.. 1989-02-01. Thulium YAG laser operation at 2.01 microns. https://ntrs.nasa.gov/citations/19890045455
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