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Chin. Opt. Lett.
 Home  List of Issues    Issue s1 , Vol. 11 , 2013    10.3788/COL201311.S10306


Analysis on absolute measurement of optical coating absorption loss based on photothermal detuning technique
Honggang Hao, Min Rao, Ao Zhou
College of Electronic Engineering, [Chongqing University of Posts and Telecommunications], Chongqing 400065, China

Chin. Opt. Lett., 2013, 11(s1): pp.S10306

DOI:10.3788/COL201311.S10306
Topic:Measurement and characterization
Keywords(OCIS Code): 140.6810  310.3915  310.5448  

Abstract
Based on the photothermal detuning technique, the three linear relations among reflectance (or transmittance), temperature rise, and pump beam power are studied to achieve the absolute measurement of absorption loss. The relation between temperature and reflectance and the calculation accuracy of temperature rise on sample surface have great impacts on the measured result. The influences of parameters involved in the method and the relation between temperature and reflectance and the temperature model of sample surface are also studied. The results show that the absolute absorption loss of optical coatings can be achieved by the proposed method. The measurement accuracy depends on the temperature model and the relation between temperature and reflectance. The linear relation between reflectance and temperature rise has largest slope when probe beam wavelength is 632.8 nm and incident angle is 28o. The linear relation slope between temperature rise and pump beam power decreases with the growing of beam size and modulation frequency. The results provide theoretical and experimental supports for the perfection and further application of the photothermal detuning technique.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2012/12/8
Accepted:2012/12/26
Posted online:2013/6/7

Get Citation: Honggang Hao, Min Rao, Ao Zhou, "Analysis on absolute measurement of optical coating absorption loss based on photothermal detuning technique," Chin. Opt. Lett. 11(s1), S10306(2013)

Note: This work was supported by the National Natural Science Foundation of China under Grant No. 60907041.



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