High-power 1.315-um laser test of multilayer mirrors

Bradley J. Pond; Tu Du; S. Talley; Charles K. Carniglia; Jim J. McNally; Gerald B. Charlton

doi:10.1117/12.180924

28 July 1994 High-power 1.315-μm laser test of multilayer mirrors

Bradley J. Pond, Tu Du, S. Talley, Charles K. Carniglia, Jim J. McNally, Gerald B. Charlton

Proceedings Volume 2114, Laser-Induced Damage in Optical Materials: 1993; (1994) https://doi.org/10.1117/12.180924
Event: Laser-Induced Damage in Optical Materials: 1993, 1993, Boulder, CO, United States

Abstract

A series of multilayer mirrors was exposed to a high power laser to measure absorption of the coatings and to test for thermal distortion. A high power chemical oxygen iodine laser with a wavelength of 1.315 micrometers was used to irradiate a variety of high reflectivity mirrors. The mirror coatings were multilayers of Ta₂O₅/SiO₂ and Si₃N₄/SiO₂ as well as aluminum enhanced with Nb₂O₅/SiO₂. The dielectric layers were deposited by modulated reactive-dc-magnetron sputtering on fused silica substrates. The coated samples were placed in a vacuum chamber and monitored with a thermal imaging camera and an interferometer during irradiation. Absorption levels as low as 10 ppm were observed and the maximum distortion of the wave front was less than (lambda) /10 at 0.633 micrometers for the best parts.

Citation Download Citation

Bradley J. Pond, Tu Du, S. Talley, Charles K. Carniglia, Jim J. McNally, and Gerald B. Charlton "High-power 1.315-μm laser test of multilayer mirrors", Proc. SPIE 2114, Laser-Induced Damage in Optical Materials: 1993, (28 July 1994); https://doi.org/10.1117/12.180924

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