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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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