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Optical Engineering

193-nm-laser-induced spectral shift in HR coated mirrors
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Paper Abstract

High-reflectance mirrors, fabricated by use of fluoride coating materials, were irradiated for extended periods by a 193-nm kilohertz repetitive laser source. This irradiation promoted a spectral shift in the reflectance band towards shorter wavelengths. 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: 10 July 2012
PDF: 7 pages
Opt. Eng. 51(12) 121804 doi: 10.1117/1.OE.51.12.121804
Published in: Optical Engineering Volume 51, Issue 12
Show Author Affiliations
Byungil Cho, Newport Corp. (United States)
J. Earl Rudisill, Newport Corp. (United States)
Edward J. Danielewicz, Newport Corp. (United States)

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