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Design and Simulation of Q-Switching and Mode-Locking Nonlinear Mirror for Frequency-Doubled DPSS Nd:YAG Laser Output

Author: A.A. Alsharify
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2011 Volume: 7 Issue: 4 Pages: 23-27
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة


In this work, multilayer reflection coating analysis has been employed for designing and simulating nonlinear mirror to be used for Q-switching and mode-locking of frequency-doubled DPSS Nd:YAG laser using composite crystal (DPM010X). It was found that the optical reflection greatly depends on the type of the nonlinear crystal and dichroic material used, the type of the refractive index (ordinary or extra-ordinary), direction of propagation inside the nonlinear material, optical thickness and the number of anti-reflection coating layer used. The calculated refracted index was found to be 2.232 for the 1064nm wavelength for LINBO3 crystal and 1.655 for 1064nm for the BBO crystal. The results show that the reflectivity reaches the best value when the refractive index difference between the anti-reflection coating layers is small, and increasing the number of such layer. The calculated phase-match angle is equal to 13.75177°.

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