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Proceedings Paper

Spatial filter with volume gratings for high-peak-power multistage laser amplifiers
Author(s): Yi-zhou Tan; Yi-sheng Yang; Guang-wei Zheng; Ben-jian Shen; Heng-yue Pan; Li Liu
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Paper Abstract

The regular spatial filters comprised of lens and pinhole are essential component in high power laser systems, such as lasers for inertial confinement fusion, nonlinear optical technology and directed-energy weapon. On the other hand the pinhole is treated as a bottleneck of high power laser due to harmful plasma created by the focusing beam. In this paper we present a spatial filter based on angular selectivity of Bragg diffraction grating to avoid the harmful focusing effect in the traditional pinhole filter. A spatial filter consisted of volume phase gratings in two-pass amplifier cavity were reported. Two-dimensional filter was proposed by using single Pi-phase-shifted Bragg grating, numerical simulation results shown that its angular spectrum bandwidth can be less than 160urad. The angular selectivity of photo-thermorefractive glass and RUGATE film filters, construction stability, thermal stability and the effects of misalignments of gratings on the diffraction efficiencies under high-pulse-energy laser operating condition are discussed.

Paper Details

Date Published: 16 August 2010
PDF: 6 pages
Proc. SPIE 7789, Laser Beam Shaping XI, 77890P (16 August 2010); doi: 10.1117/12.861099
Show Author Affiliations
Yi-zhou Tan, National Univ. of Defense Technology (China)
Yi-sheng Yang, National Univ. of Defense Technology (China)
Guang-wei Zheng, National Univ. of Defense Technology (China)
Ben-jian Shen, National Univ. of Defense Technology (China)
Heng-yue Pan, National Univ. of Defense Technology (China)
Li Liu, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 7789:
Laser Beam Shaping XI
Andrew Forbes; Todd E. Lizotte, Editor(s)

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