Real Time Laser Damage Detection In Bulk Materials By Strehl Intensities

B. W. Mullins; A. B. Romberger

doi:10.1117/12.976150

20 November 1985 Real Time Laser Damage Detection In Bulk Materials By Strehl Intensities

B. W. Mullins, A. B. Romberger

Proceedings Volume 0540, Southwest Conf on Optics '85; (1985) https://doi.org/10.1117/12.976150
Event: 1985 Albuquerque Conferences on Optics, 1985, Albuquerque, United States

Abstract

Real time detection and measurement of laser-induced damage in bulk polymethyl-methacrylate (PMMA) has been achieved by use of a Strehl intensity detector. PMMA was damaged using a pulsed Nd:YAG laser, λ = 1.06 um and tp = 8 ± 2 nsec (FWHM). A cw HeNe laser probe beam was aligned to propagate collinearly with the Nd:YAG laser beam and come to a focus at approximately the same place in the PMMA sample. The HeNe laser beam's intensity was measured with a Strehl detector and recorded on a strip chart recorder. The steady state Strehl intensity detected the presence and diameter of laser. induced damage sites within + 4.5 um over a 2 um to 20 um array of damage site diameters.

Citation Download Citation

B. W. Mullins and A. B. Romberger "Real Time Laser Damage Detection In Bulk Materials By Strehl Intensities", Proc. SPIE 0540, Southwest Conf on Optics '85, (20 November 1985); https://doi.org/10.1117/12.976150

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