193 nm laser induced spectral shift in HR coated mirrors

Byungil Cho; J. Earl Rudisill; Edward Danielewicz

doi:10.1117/12.836262

31 December 2009 193 nm laser induced spectral shift in HR coated mirrors

Byungil Cho, J. Earl Rudisill, Edward Danielewicz

Proceedings Volume 7504, Laser-Induced Damage in Optical Materials: 2009; 750409 (2009) https://doi.org/10.1117/12.836262
Event: Laser Damage Symposium XLI: Annual Symposium on Optical Materials for High Power Lasers, 2009, Boulder, Colorado, United States

Abstract

High reflectance mirrors, using fluoride coating materials, have been irradiated for extended time periods by a 193 nm kilohertz repetitive laser source. This irradiation promoted a spectral shift in the reflectance band towards shorter wavelength. In efforts to determine the mechanism for the observed spectral shifts, various models were investigated by employing such techniques as: spectrophotometry, surface profile interferometry, coating design simulation and x-ray diffraction. The result of the investigation indicates that layers near the top surface of the coating structure underwent densification which resulted in the observed spectral shift.

Citation Download Citation

Byungil Cho, J. Earl Rudisill, and Edward Danielewicz "193 nm laser induced spectral shift in HR coated mirrors", Proc. SPIE 7504, Laser-Induced Damage in Optical Materials: 2009, 750409 (31 December 2009); https://doi.org/10.1117/12.836262

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