Measurement of weak absorption of thin film coatings irradiated by 10.6μm laser

yang fu; huang wei; zhang bin; qi wen-zong; cai bang-wei

Volume 16 Issue 03

Mar. 2004

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Article Navigation > High Power Laser and Particle Beams > 2004 > 16(03): 0-

chen wei-qing, zeng zheng-zhong, zou li-li, et al. Mass jet distribution in gas spark gaps under microsecond 100kA current pulse[J]. High Power Laser and Particle Beams, 2004, 16.

Citation:

yang fu, huang wei, zhang bin, et al. Measurement of weak absorption of thin film coatings irradiated by 10.6μm laser[J]. High Power Laser and Particle Beams, 2004, 16.

chen wei-qing, zeng zheng-zhong, zou li-li, et al. Mass jet distribution in gas spark gaps under microsecond 100kA current pulse[J]. High Power Laser and Particle Beams, 2004, 16.

Citation:

yang fu, huang wei, zhang bin, et al. Measurement of weak absorption of thin film coatings irradiated by 10.6μm laser[J]. High Power Laser and Particle Beams, 2004, 16.

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Measurement of weak absorption of thin film coatings irradiated by 10.6μm laser

1.
College of Electronic Information,Sichuan University,Chengdu 610064,China;
2.
Department of Physics,Zhangjiakou Teachers College,Zhangjiakou 075028,China;
3.
Institute of Optics & Electronics,the Chinese Academy of Sciences,P.O.Box 350,Chengdu 610209,China

Publish Date: 2004-03-15

Abstract

Abstract

The absorption of optical thin film coatings is one of the main factors that limit the development of high power lasers. It is necessary to measure the absorption of the optical thin film coatings precisely, fast and in real-time. The experimental setup for measuring the weak absorption of the optical thin films has been built using the surface thermal lensing technique. The weak absorption of different optical thin films, including the single-layer ZnS and YbF3 dielectric thin films with different thickness, as well as the different multilayer thin films (YbF3/ ZnS) deposited on Ge substrate, irradiated by 10.6μm CO2 laser has been measured. The experimental results show that the lowest absorption measured by the experimental system is 2.87×10－4 and the sensitivity of the experim
- surface thermal lensing technique,
- weak absorption,
- optical thin film coatings,
- 10.6μm co2 laser

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