1 August 2017 Influence of laser wavelengths and polarizations on absorption of KDP crystal
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Proceedings Volume 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers; 1033918 (2017) https://doi.org/10.1117/12.2271127
Event: Pacific Rim Laser Damage 2017: Optical Materials for High Power Lasers, 2017, Shanghai, China
Abstract
We measured the absorption of type I doubler KDP crystal at different laser wavelengths (1064, 532 and 355 nm) by using laser induced deflection (LID) technique. We also performed the absorption measurements in the cases where beam polarization was parallel to the principal plane (Pd//Pp) and perpendicular to it (Pd⊥Pp). To account for the experiment results, a model based on crystal dichroism was developed to calculate the absorption coefficients for O ray (αo) and E ray (αe) at different laser wavelengths. It is found that the dichroism is manifested especially clearly at 1064nm, but not clearly at 355nm/532nm. It implies that the absorption at 1064nm is mainly due to lattice absorption, whereas defects absorption is responsible for the absorption at 355nm/532nm.
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Xiaocong Peng, Xiaocong Peng, Yuanan Zhao, Yuanan Zhao, Yueliang Wang, Yueliang Wang, Zhen Cao, Zhen Cao, Guohang Hu, Guohang Hu, Jianda Shao, Jianda Shao, } "Influence of laser wavelengths and polarizations on absorption of KDP crystal", Proc. SPIE 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers, 1033918 (1 August 2017); doi: 10.1117/12.2271127; https://doi.org/10.1117/12.2271127
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