STP1117

    Pulse-Width Dependence of Optical Coating Damage at 1052 nm

    Published: Jan 1990


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    Abstract

    Pulse-width dependence of optical coating damages at 1053 nm laser wavelength is studied. Quarterwave-thick single layer films of high-index materials of A12O3, ZrO2 and TiO2, and low-index materials of MgF2 and SiO2 were tested. Damage thresholds of the MgF2 and SiO2 films follow the square root dependence on the pulse-width τ (√τ scaling) over the pulse widths of 0.35-90 ns. Although the damage thresholds of the A12O3, ZrO2 and TiO2 films followed the √τ scaling from 0.35 to 1 ns, they become independent of the pulse-width for the pulse-widths longer than 6 ns. That is, the pulse-width dependence of the damage threshold is determined by the absorption property of the coating layer, which controls the damage mechanism.


    Author Information:

    Yoshida, K
    Institute of Laser Engineering Osaka University, Suita, Osaka,

    Ikunishi, S
    Institute of Laser Engineering Osaka University, Suita, Osaka,

    Yoshida, H
    Institute of Laser Engineering Osaka University, Suita, Osaka,

    Kato, Y
    Institute of Laser Engineering Osaka University, Suita, Osaka,

    Nakai, S
    Institute of Laser Engineering Osaka University, Suita, Osaka,


    Paper ID: STP26510S

    Committee/Subcommittee: E13.15

    DOI: 10.1520/STP26510S


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