Optical characteristics and damage thresholds of low loss mirrors

Rainer Henking; Detlev Ristau; Ferdinand von Alvensleben; Herbert Welling

doi:10.1117/12.213744

14 July 1995 Optical characteristics and damage thresholds of low loss mirrors

Rainer Henking, Detlev Ristau, Ferdinand von Alvensleben, Herbert Welling

Proceedings Volume 2428, Laser-Induced Damage in Optical Materials: 1994; (1995) https://doi.org/10.1117/12.213744
Event: Laser-Induced Damage in Optical Materials: 1994, 1994, Boulder, CO, United States

Abstract

High reflecting mirrors for the wavelength of 514 nm were produced with ion-beam sputtering using different process parameters. The optical characteristics were determined by cavity decay time measurement, laser calorimetry, and total integrated scatter measurements. The results for single layer of SiO₂ and Ta₂O₅ were evaluated with respect to an optimization of the deposition process. Furthermore, coatings were investigated by IR spectroscopy and RBS. Laser induced damage thresholds of coatings were measured with a pulsed Nd:YAG laser. Mirrors produced with optimized parameters show absorption values less than 5 ppm, and the scatter losses are in the range of 6 ppm at 514 nm. Adding the transmission loss of the mirrors, this is in good agreement with the results of the cavity decay time measurement. The damage threshold values and the optical losses are discussed and compared to the results of conventional coatings.

Citation Download Citation

Rainer Henking, Detlev Ristau, Ferdinand von Alvensleben, and Herbert Welling "Optical characteristics and damage thresholds of low loss mirrors", Proc. SPIE 2428, Laser-Induced Damage in Optical Materials: 1994, (14 July 1995); https://doi.org/10.1117/12.213744

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