Comparative study of evolution of laser damage in HgCdTe, CdTe, and CdZnTe with nanosecond 1.06-um wavelength multiple pulses

Amit Garg; Avinashi Kapoor; Kailash Narayan Tripathi; Surendera Kumar Bansal

doi:10.1117/12.524235

10 June 2004 Comparative study of evolution of laser damage in HgCdTe, CdTe, and CdZnTe with nanosecond 1.06-μm wavelength multiple pulses

Amit Garg, Avinashi Kapoor, Kailash Narayan Tripathi, Surendera Kumar Bansal

Author Affiliations +

Proceedings Volume 5273, Laser-Induced Damage in Optical Materials: 2003; (2004) https://doi.org/10.1117/12.524235
Event: XXXV Annual Symposium on Optical Materials for High Power Lasers: Boulder Damage Symposium, 2003, Boulder, Colorado, United States

Abstract

Evolution of damage in mirror polished samples of HgCdTe, CdTe & CdZnTe has been studied for three fluence regimes-Damage Threshold (F_th), Five Times Damage Threshold (5F_th), Ten Times Damage Threshold (10F_th) 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.

Citation Download Citation

Amit Garg, Avinashi Kapoor, Kailash Narayan Tripathi, and Surendera Kumar Bansal "Comparative study of evolution of laser damage in HgCdTe, CdTe, and CdZnTe with nanosecond 1.06-μm wavelength multiple pulses", Proc. SPIE 5273, Laser-Induced Damage in Optical Materials: 2003, (10 June 2004); https://doi.org/10.1117/12.524235

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