Design and operation of a highly sensitive and accurate laser calorimeter for low-absorbtion materials

Etsuo Kawate; Leonard M. Hanssen; Simon G. Kaplan; Raju V. Datla

doi:10.1117/12.326660

8 October 1998 Design and operation of a highly sensitive and accurate laser calorimeter for low-absorbtion materials

Etsuo Kawate, Leonard M. Hanssen, Simon G. Kaplan, Raju V. Datla

Proceedings Volume 3425, Optical Diagnostic Methods for Inorganic Transmissive Materials; (1998) https://doi.org/10.1117/12.326660
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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.

Citation Download Citation

Etsuo Kawate, Leonard M. Hanssen, Simon G. Kaplan, and 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); https://doi.org/10.1117/12.326660

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