Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7925342 | Optics Communications | 2018 | 4 Pages |
Abstract
Combined with partial parameters in National Ignition Facility, the conceptual design of off-axial four-pass main laser optical system with a three-lens slit spatial filter has been discussed. Since the three-lens slit spatial filter can decline the focal intensity by about 3 orders of magnitudes than that in NIF system, the cutoff frequency in main amplifier cavity can be reduced from 51Â ÃÂ DL to 39Â ÃÂ DL for better beam quality. The main laser system for single beam line can be shortened from 174.7Â m to 155.7Â m and the spatial filter in high vacuum becomes 60Â m instead of the original 83.5Â m. Additionally, the pinhole closure could be avoided since the declining of focal intensity in slit spatial filter and the absence of pinhole aperture in the other (pinhole) spatial filter, which provides new ideas for the future high-power lasers.
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Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Han Xiong,