Basic Study on Important Parameters of Spatial Filter Used in High Power Laser System

Yu Mei Nie

doi:10.4028/www.scientific.net/AMR.760-762.251

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 760-762Basic Study on Important Parameters of Spatial...

Basic Study on Important Parameters of Spatial Filter Used in High Power Laser System

Abstract:

The focal length of the lens in the spatial filter should simultaneously satisfy the requirement of vacuum and the minimum spherical aberration. In order to filter the high frequency components, the divergence angle of the filter must be less than a certain value according to the system requirement. So the aperture of the filter hole used in the high power laser system is about 20 times of the diffraction limitation. At the same time, the scope of the location of the filter hole in the optical axis is reasonable as long as the location within the focal depth. In addition, the model was built by means of the optical design software to simulate validation. The simulation results show that the designed spatial filter according to the method presented in the paper can effectively filter out the high frequency components and stray light in the system.

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Periodical:

Advanced Materials Research (Volumes 760-762)

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251-254

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.760-762.251

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Online since:

September 2013

Authors:

Yu Mei Nie

Keywords:

Focal Depth, Focal Length, Gaussian Beams, High Power Laser, Spatial Filter

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