Investigation of output phase characteristic for a passively Q-switching high-power slab YAG laser

Zhang Xiang

doi:10.1117/12.870311

21 July 2010 Investigation of output phase characteristic for a passively Q-switching high-power slab YAG laser

Zhang Xiang

Proceedings Volume 7749, 2010 International Conference on Display and Photonics; 774922 (2010) https://doi.org/10.1117/12.870311
Event: 2010 International Conference on Display and Photonics, 2010, Nanjing, China

Abstract

Many factors of intracavity perturbation will degrade the output power and beam quality for high power passive Q-switched slab laser. In this paper, the experiment test on the output beam quality of a passive Q-switched zig-zag slab Nd:YAG laser has been performed by adopting Shack-Hartmann (S-H) wavefront sensor and Zernike mode reconstruction theory. In this way, the PV and RMS values of the wavefront aberration, every order zernike aberrations can be acquired accurately, distribution of circle energy in far-field and other beam evaluation factors can also be obtained by further calculation, so the beam-quality can be known fully. Experimental results show that the wavefront aberration of laser is mainly concentrated in the frontal 10 ranks of Zernike aberration, mainly including the defocus A₃, the low-order astigmatism A₅, the coma aberration A₆ and the spherical aberration A₁₀ because of the crystal thermal effect and the intracavity aberrated perturbation.

Citation Download Citation

Zhang Xiang "Investigation of output phase characteristic for a passively Q-switching high-power slab YAG laser", Proc. SPIE 7749, 2010 International Conference on Display and Photonics, 774922 (21 July 2010); https://doi.org/10.1117/12.870311

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