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Alkali resistant optical coatings for alkali lasers and methods of production thereof

Patent ·
OSTI ID:1164003
In one embodiment, a multilayer dielectric coating for use in an alkali laser includes two or more alternating layers of high and low refractive index materials, wherein an innermost layer includes a thicker, >500 nm, and dense, >97% of theoretical, layer of at least one of: alumina, zirconia, and hafnia for protecting subsequent layers of the two or more alternating layers of high and low index dielectric materials from alkali attack. In another embodiment, a method for forming an alkali resistant coating includes forming a first oxide material above a substrate and forming a second oxide material above the first oxide material to form a multilayer dielectric coating, wherein the second oxide material is on a side of the multilayer dielectric coating for contacting an alkali.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-07NA27344
Assignee:
Lawrence Livermore National Security, LLC. (Livermore, CA)
Patent Number(s):
8,889,251
Application Number:
13/023,841
OSTI ID:
1164003
Country of Publication:
United States
Language:
English

References (3)

End-pumped continuous-wave alkali vapor lasers: experiment, model, and power scaling journal January 2004
Resonance transition 795-nm rubidium laser journal January 2003
Pulsed laser deposition of alumina and zirconia thin films on polymers and glass as optical and protective coatings journal September 1999

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