High gain pre-amplifier laser beam quality evaluating system

Yang Liu; Jin Yu; Tianzhuo Zhao; Xue Zhang; Zhongwei Fan

doi:10.1117/12.900230

19 August 2011 High gain pre-amplifier laser beam quality evaluating system

Yang Liu, Jin Yu, Tianzhuo Zhao, Xue Zhang, Zhongwei Fan

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81921U (2011) https://doi.org/10.1117/12.900230
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Designed a system for the high gain laser pre-amplifier to evaluate the image quality. The system uses 4f imaging principle and Kepler type telescope was choiced, it has two advantages: avert optical distortion and eliminate aberration in the measurement system. Combined with the location of the lens inside of pre-amplifier such as the spatial filter , the near field imaging structure was designed. The structure can be reduced to 11.9 times the beam image, and clearly passed the image to the CCD target surface. The location of first positive lens focus is the location of far field image. In this article, one laser pre-amplifier was measured. The average measured near field modulation M=1.34, the average measured far field diffraction limit is 2.94. Experiments show that the stability of measuring system is less than±5%, it can meet the measurement requirements of ICF laser pre-amplifier parameters. Use this system we can discover the problem during the design and installation. There is great meaning for develop of laser pre-amplifier in ICF for further.

Citation Download Citation

Yang Liu, Jin Yu, Tianzhuo Zhao, Xue Zhang, and Zhongwei Fan "High gain pre-amplifier laser beam quality evaluating system", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81921U (19 August 2011); https://doi.org/10.1117/12.900230

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KEYWORDS

Near field

Charge-coupled devices

Diffraction

Imaging systems

Modulation

Image quality standards

Attenuators

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