8 October 1998 Design and operation of a highly sensitive and accurate laser calorimeter for low-absorbtion materials
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Abstract
This work surveys techniques to measure the absorption coefficient of low absorption materials. A laser calorimeter is being developed with a sensitivity goal of (1 +/- 0.2)X 10-5 cm-1 with one watt of laser power using a CO2 laser (9 (mu) m to 11 (mu) m), a CO laser (5 (mu) m to 8 (mu) m), a He-Ne laser (3.39 (mu) m), and a pumped OPO tunable laser (2 (mu) m to 4 (mu) m) in the infrared region. Much attention has been given to the requirements for high sensitivity and to sources of systematic error including stray light. Our laser calorimeter is capable of absolute electrical calibration. Preliminary results for the absorption coefficient of highly transparent potassium chloride (KCl) samples are reported.
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Etsuo Kawate, Etsuo Kawate, Leonard M. Hanssen, Leonard M. Hanssen, Simon G. Kaplan, Simon G. Kaplan, Raju V. Datla, Raju V. Datla, } "Design and operation of a highly sensitive and accurate laser calorimeter for low-absorbtion materials", Proc. SPIE 3425, Optical Diagnostic Methods for Inorganic Transmissive Materials, (8 October 1998); doi: 10.1117/12.326660; https://doi.org/10.1117/12.326660
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