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Laser damage studies in nonlinear optical crystal sodium p-nitrophenolate dihydrate

Authors:	S. Vanishri J.N. Babu Reddy H.L. Bhat S. Ghosh

Affiliation:	(1) Department of Physics, Indian Institute of Science, Bangalore, 560012, India;(2) Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India

Abstract:	We report the surface laser damage threshold in sodium p-nitrophenolate dihydrate, a nonlinear optical crystal. The experiment is performed with a pulsed Nd:YAG laser in TEM₀₀ mode. The single shot damage thresholds are 11.16±0.28 GW cm^-2 and 1.25±0.02 GW cm^-2 for 1064 nm and 532 nm laser wavelengths respectively. A close correlation between the laser damage threshold and mechanical hardness is observed. A possible mechanism of laser damage is discussed. PACS 42.70.Mp; 61.80.Ba; 81.10.Dn

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