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Laser damage threshold studies on urea L-malic acid: A nonlinear optical crystal

Vanishri, S and Bhat, HL and Deepthy, A and Nampoori, VPN and Gomes, Matos E de and Belsley, M (2006) Laser damage threshold studies on urea L-malic acid: A nonlinear optical crystal. In: Journal of Applied Physics, 99 (8). 083107-083107.

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Abstract

A detailed study of surface laser damage performed on a nonlinear optical crystal, urea L-malic acid, using 7 ns laser pulses at 10 Hz repetition rate from a Q-switched Nd:YAG laser at wavelengths of 532 and 1064 nm is reported. The single shot and multiple shot surface laser damage threshold values are determined to be 26.64±0.19 and 20.60±0.36 GW cm−2 at 1064 nm and 18.44±0.31 and 7.52±0.22 GW cm−2 at 532 nm laser radiation, respectively. The laser damage anisotropy is consistent with the Vickers mechanical hardness measurement performed along three crystallographic directions. The Knoop polar plot also reflects the damage morphology. Our investigation reveals a direct correlation between the laser damage profile and hardness anisotropy. Thermal breakdown of the crystal is identified as the possible mechanism of laser induced surface damage.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 29 Dec 2011 10:11
Last Modified: 29 Dec 2011 10:11
URI: http://eprints.iisc.ernet.in/id/eprint/42948

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