Measurement of femtosecond laser damage thresholds at mid IR wavelengths

Drake Austin; Kyle Kafka; Cosmin I. Blaga; Louis F. Dimauro; Enam Chowdhury

doi:10.1117/12.2068205

31 October 2014 Measurement of femtosecond laser damage thresholds at mid IR wavelengths

Drake Austin, Kyle Kafka, Cosmin I. Blaga, Louis F. Dimauro, Enam Chowdhury

Proceedings Volume 9237, Laser-Induced Damage in Optical Materials: 2014; 92370V (2014) https://doi.org/10.1117/12.2068205
Event: SPIE Laser Damage, 2014, Boulder, Colorado, United States

Abstract

Laser solid interaction with < 100 fs pulses from 800 - 3600 nm wavelength was studied at 45 degree angle of incidence with s- and p-polarized light. Mid-IR femtosecond laser damage thresholds of Si, Ge, and ZnSe were determined. Obtained results were compared against existing Two Temperature Model for laser damage which was shown to fail at longer wavelengths. Experimental evidence suggests that electron dynamics at the interaction vacuum-solid interface contribute to lowering of laser damage threshold at longer wavelengths.

Citation Download Citation

Drake Austin, Kyle Kafka, Cosmin I. Blaga, Louis F. Dimauro, and Enam Chowdhury "Measurement of femtosecond laser damage thresholds at mid IR wavelengths", Proc. SPIE 9237, Laser-Induced Damage in Optical Materials: 2014, 92370V (31 October 2014); https://doi.org/10.1117/12.2068205

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