Laser Doppler interferometry for measuring small absorption coefficients
作者:
L. H. Skolnik,
A. Hordvik,
A. Kahan,
期刊:
Applied Physics Letters
(AIP Available online 1973)
卷期:
Volume 23,
issue 8
页码: 477-479
ISSN:0003-6951
年代: 1973
DOI:10.1063/1.1654965
出版商: AIP
数据来源: AIP
摘要:
A laser Doppler interferometric technique for measuring small absorption coefficients of infrared‐transmitting materials is described. The interferometer is calibrated as a remote temperature sensor by monitoring optical path length changes of the sample as a function of temperature. The sample is then irradiated by a CO2laser and the change in optical path due to absorbed laser energy is observed interferometrically as a function of time. From this measurement and the calibration data, a temperature‐vs‐time curve is generated from which the absorption coefficient of the sample at 10.6 &mgr; may be calculated.
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