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Damage-resistant thin-film plate polarizer

: Schallenberg, U.B.; Kaiser, N.


Bennett, H.E.; Guenther, A.H.:
Laser-induced damage in optical materials 1996. Proceedings
Bellingham, Wash.: SPIE, 1997 (SPIE Proceedings Series 2966)
ISBN: 0-8194-2370-X
Symposium on Optical Materials for High-Power Lasers <28, 1996, Boulder/Colo.>
Conference Paper
Fraunhofer IOF ()
Dünnschichtpolarisator; Fabry-Perot interference filter; Fabry-Perot Interferenzfilter; laser damage threshold testing; laser-induzierte Zerstörschwelle; thin-film polarizer

A thin-film plate polarizer with a high polarization ratio for single laser wavelengths can be realized if a Fabry-Perot filter design is used. The spectral with of the polarization region of the filter polarizer is smaller than that of the usual long-wave pass filter, but there are not the practical difficulties of depositing multilayer systems with a large number of layers having non-quarter-wave thicknesses. Experimental results of the Fabry-Perot filter polarizer at 355 nm with HfO2 and SiO2 are presented. The laser-induced damage thresholds of the polarizer are enraised by both minimizing locally high light intensities and minimizing absorption.