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28 August 2009 The research of the thermal effect and experimental test of the beam phase properties for the Q-switched LD pumped laser
Xiang Zhang, Jing Luo
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Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 73822P (2009) https://doi.org/10.1117/12.835716
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China
Abstract
The results of an experimental and theoretical study of the proprerties of a LD pumped laser using a plano-concave stable resonator are presented. The influence of thermal lens effect on laser output mode and beam quality has been discussed briefly by using the transfer matrix theory. In this paper, further experiment on the output beam quality of a LD pumped acousto-optic Q-switched laser has been also performed by adopting Hartmann-Shack wavefront sensor and Zernike mode reconstruction theory. Using this method, the PV and RMS values of the aberration wavefront, the frontal 35-order Zernike aberrations can be acquired, and the Strehl ratio curve of the output beam and the distribution of circle energy can also be obtained by calculation, so the mode properities can be fully understood. The experimental results show that the beam wavefront aberration is mainly concentrated in the frontal 15 orders of Zernike aberration, mainly including the defocus A3, the low-order astigmatism A4 and A5, and the coma aberration A6 and A7 because of the crystal thermal effect.
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Xiang Zhang and Jing Luo "The research of the thermal effect and experimental test of the beam phase properties for the Q-switched LD pumped laser", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73822P (28 August 2009); https://doi.org/10.1117/12.835716
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KEYWORDS
Thermal effects
Wavefronts
Resonators
Monochromatic aberrations
Wavefront sensors
Mirrors
Q switched lasers
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