Study on energy loss compensation of back scattering conical cavity high-energy laser energy meter

Xun Yu; Hui Wang; Xiao-yan Shang; Liang Nie; Bao-yuan Liu

doi:10.1117/12.828705

20 May 2009 Study on energy loss compensation of back scattering conical cavity high-energy laser energy meter

Xun Yu, Hui Wang, Xiao-yan Shang, Liang Nie, Bao-yuan Liu

Proceedings Volume 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 72832A (2009) https://doi.org/10.1117/12.828705
Event: AOMATT 2008 - 4th International Symposium on Advanced Optical Manufacturing, 2008, Chengdu, Chengdu, China

Abstract

Because absolute quantity thermal laser energy meter based on conical cavity has some features, for example, wide wavelength adaptation range, high laser damage threshold value, extensive measuring energy range and so on, it is often used as the standard of high-energy laser energy meter, and is used extensively in the domain of high energy laser measurement. But, laser energy will lose because of back scattering of conical absorption cavity. So, only after the loss is compensated and amended, exact measurement of laser energy can be achieved. Aiming at energy loss compensation problem of conical cavity high-energy laser energy meter, we firstly, according to speckle statistics optical theory, analyze the back scattering of the conical absorption cavity in condition of uniform distribution laser incident on diffuse reflection surface, and secondly, we aim at high power laser's output facula shape: round, based on optical principles of interaction of the conical cavity inner face and the incident laser and utilize complexfication Simpson numerical method, the mathematical models of optical power density distribution at open-end of conical cavity and back scattering gross power are established. On this basis, the measured result is compensated and amended. The back scattering energy loss is about 0.5% to 2.5%.High-energy laser energy measuring accuracy is improved effectively.

Citation Download Citation

Xun Yu, Hui Wang, Xiao-yan Shang, Liang Nie, and Bao-yuan Liu "Study on energy loss compensation of back scattering conical cavity high-energy laser energy meter", Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72832A (20 May 2009); https://doi.org/10.1117/12.828705

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