SEDL / STP / STP799-EB / STP37239S

Thermo-Optic Coefficient (∂n/∂T) of 1.3 μm Laser Window Materials

Harris, RJ
University of Dayton Research Institute, Dayton, Ohio

Gangl, ME
University of Dayton Research Institute, Dayton, Ohio

Pages: 4    Published: Jan 1983

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Abstract

The thermo-optic coefficient (∂n/∂T) of several 1.3 μm laser window materials has been measured in the visible and near infrared spectral regions. These materials include CaF², Al²O³, MgO, MgF², YAG, YLF, water clear ZnS, Kigre Q-98 glass, Corning CORTRAN glasses, and LiF. The measurements were made in the temperature range of 25 to 100 degrees C using a laser interferometric technique. The lasers used were HeNe lasers operating at 0.6328 μm, 1.15 μm, and 3.39 μm and a Nd:YAG laser operating at 1.3 μm.