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Proceedings Paper

193 nm laser induced spectral shift in HR coated mirrors
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Paper 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.

Paper Details

Date Published: 31 December 2009
PDF: 10 pages
Proc. SPIE 7504, Laser-Induced Damage in Optical Materials: 2009, 750409 (31 December 2009); doi: 10.1117/12.836262
Show Author Affiliations
Byungil Cho, Newport Corp. (United States)
J. Earl Rudisill, Newport Corp. (United States)
Edward Danielewicz, Newport Corp. (United States)

Published in SPIE Proceedings Vol. 7504:
Laser-Induced Damage in Optical Materials: 2009
Gregory J. Exarhos; Vitaly E. Gruzdev; Detlev Ristau; M. J. Soileau; Christopher J. Stolz, Editor(s)

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