STP759: Pulsed CO2 Damage Threshold Measurements of Rb:KCl and NaCl

    Detrio, JA
    University of Dayton Research Institute, Dayton, Ohio

    Dempsey, DA
    University of Dayton Research Institute, Dayton, Ohio

    Pages: 6    Published: Oct 1981


    Abstract

    The l-on-N damage threshold of specimens of forged NaCl, Rb:KCl and antireflection coated KCl were measured at 10.6 μm with a pulse duration of 10 μ sec. An acid etch significantly improved the survivability of the NaCl specimens which normally received surface damage while the response of KCl was not influenced by the etch treatment. The coated KCl survived about as well as the uncoated specimens. The measured damage thresholds were: etched NaCl, 24.2 J/cm2; NaCl, 12.0 J/cm2; etched KCl, unetched KCl, and coated KCl, 10 J/cm2.

    The damage morphology included entrance and exit surface damage on all types of specimens and bulk damage in the KCl specimens. The surface damage observed in some cases was an artifact produced by a plasma which formed at the specimen entrance face.

    Keywords:

    Alkali halides, bulk damage, CO, 2, laser, coating damage, laser damage, microsecond pulses, NaCl, surface damage


    Paper ID: STP36999S

    Committee/Subcommittee: F01.02

    DOI: 10.1520/STP36999S


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