19 August 1996 Interferometric measurements of thermo-optic coefficients of ZnS, CaF2, and Ge in the infrared
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Abstract
The thermo-optic coefficient (delta) n divided by (delta) T of CaF2, ZnS and Ge single crystals have been measured in the infrared from 20 degrees C to 100 degrees C. The laser interferometric method employed allows a determination of (delta) n divided by (delta) T with an accuracy close to 10-6K-1 in the case of nonabsorbing materials. For Ge the uncertainty is increased by a factor of 3 and is mainly due to its increasing absorption coefficient with temperature. The behavior of ZnS was examined at 1.06 micrometers and 10.6 micrometers laser radiations; CaF2 and Ge were investigated respectively at 1.06 micrometers and 10.6 micrometers.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jacques Mangin, Jacques Mangin, Pierre Strimer, Pierre Strimer, Marc Schillinger, Marc Schillinger, Jean-Louis P. Meyzonnette, Jean-Louis P. Meyzonnette, Jacques Thebault, Jacques Thebault, C. Aymonier, C. Aymonier, } "Interferometric measurements of thermo-optic coefficients of ZnS, CaF2, and Ge in the infrared", Proc. SPIE 2775, Specification, Production, and Testing of Optical Components and Systems, (19 August 1996); doi: 10.1117/12.246739; https://doi.org/10.1117/12.246739
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