Far-field detection system for laser beams alignment and crystals alignment

D. Liu; H. Qin; B. Zhu

doi:10.1117/12.2191818

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5 August 2015 Far-field detection system for laser beams alignment and crystals alignment

D. Liu, H. Qin, B. Zhu

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Proceedings Volume 9621, 2015 International Conference on Optical Instruments and Technology: Advanced Lasers and Applications; 962102 (2015) https://doi.org/10.1117/12.2191818
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China

Abstract

Laser beams far-field alignment is very important for the high power laser facility as well as the frequency doubling crystals adjustment. Traditional beams alignment system and crystals alignment system are separated. That means, they use different optical image systems and CCD cameras, which will occupy larger space and use more money. A new farfield detection system of laser beams is presented with a big diffraction grating (37mm*37mm), a set of optical imaging components and a high resolution CCD camera. This detection system, which is fully demonstrated on the National Laser Facility of Israel, can align high power laser facility beams’ direction as well as the frequency doubling crystals. The new system occupies small space in the spatial filter through off-axial grating sampling. The experimental results indicate that the average far-field alignment error is less than 5% of spatial filter pinhole diameter, and the average crystals’ matching angle error is less than 10urad, which meet the alignment system requirements for beams and crystals.

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D. Liu, H. Qin, and B. Zhu "Far-field detection system for laser beams alignment and crystals alignment", Proc. SPIE 9621, 2015 International Conference on Optical Instruments and Technology: Advanced Lasers and Applications, 962102 (5 August 2015); https://doi.org/10.1117/12.2191818

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