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31 December 2009 193 nm laser induced spectral shift in HR coated mirrors
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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.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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