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Proceedings Paper

Comparative study of evolution of laser damage in HgCdTe, CdTe, and CdZnTe with nanosecond 1.06-um wavelength multiple pulses
Author(s): Amit Garg; Avinashi Kapoor; Kailash Narayan Tripathi; Surendera Kumar Bansal
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Paper Abstract

Evolution of damage in mirror polished samples of HgCdTe, CdTe & CdZnTe has been studied for three fluence regimes-Damage Threshold (Fth), Five Times Damage Threshold (5Fth), Ten Times Damage Threshold (10Fth) with multiple pulses of a Q-switched 1.06 μm Nd:YAG laser of 20ns pulse duration. Damage morphology observed under Scanning Electron Microscope (SEM) seem to evolve almost in similar fashion with increasing number of pulses as well as incident energy in HgCdTe and CdZnTe on account of uniform heating through a significant depth through the sample surface whereas in case of CdTe, effect of subsurface superheating is evident. Thermal modeling has been done to explain the evolution of laser damage.

Paper Details

Date Published: 10 June 2004
PDF: 7 pages
Proc. SPIE 5273, Laser-Induced Damage in Optical Materials: 2003, (10 June 2004); doi: 10.1117/12.524235
Show Author Affiliations
Amit Garg, Univ. of Delhi (India)
Avinashi Kapoor, Univ. of Delhi (India)
Kailash Narayan Tripathi, Univ. of Delhi (India)
Surendera Kumar Bansal, Univ. of Delhi (India)

Published in SPIE Proceedings Vol. 5273:
Laser-Induced Damage in Optical Materials: 2003
Gregory J. Exarhos; Arthur H. Guenther; Norbert Kaiser; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz, Editor(s)

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