Experimental analysis of output wavefront properties for the passive Q-switched slab Nd:YAG laser

Xiang Zhang

doi:10.1117/12.866171

12 October 2010 Experimental analysis of output wavefront properties for the passive Q-switched slab Nd:YAG laser

Xiang Zhang

Proceedings Volume 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 76564S (2010) https://doi.org/10.1117/12.866171
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

Many factors of intracavity perturbation will degrade the output power and beam quality for high power passive Q-switched slab laser. In the 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 Hartmann-Shack (H-S) 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, and the point spread function (PSF) of the beam and the distribution of circle energy can also be obtained by further calculation, so the beam-quality can be known fully. The 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

Xiang Zhang "Experimental analysis of output wavefront properties for the passive Q-switched slab Nd:YAG laser", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76564S (12 October 2010); https://doi.org/10.1117/12.866171

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KEYWORDS

Wavefronts

Monochromatic aberrations

Wavefront sensors

Nd:YAG lasers

Q switched lasers

Crystals

Pulsed laser operation

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