STP1028: An Investigation of Laser Processing of Thin Film Coatings

    Weber, AJ
    Air Force Weapons Laboratory, Kirtland Air Force Base, Mew Mexico

    Stewart, AF
    Air Force Weapons Laboratory, Kirtland Air Force Base, Mew Mexico

    Exarhos, GJ
    Air Force Weapons Laboratory, Kirtland Air Force Base, Mew Mexico

    Pages: 8    Published: Jan 1988


    Abstract

    An initial set of experiments has been conducted to determine the practicality of laser processing of thin film coatings. A high average power CO2 laser was used to flood load the entire surface of each test sample. Thin film coatings of HfO2 and MgF2 on fused silica substrates were irradiated with power densities between 25 and 125 W/cm2.

    Extensive pre- and post-test characterization revealed that some changes in the microstructure were observed, the coating optical thickness was reduced and short wavelength transmission was improved.

    Keywords:

    HfO, 2, MgF, 2, Raman spectroscopy, surfaces, thin films, total integrated scattering


    Paper ID: STP18566S

    Committee/Subcommittee: E13.08

    DOI: 10.1520/STP18566S


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