STP1028: Variations with Laser Pulse Duration of the Thresholds at 350-nm and 1064-nm for Bulk Damage in Crystals of KDP

    Gonzales, RP
    Lawrence Livermore National Laboratory University of California, Livermore, California

    Staggs, MC
    Lawrence Livermore National Laboratory University of California, Livermore, California

    Singleton, MF
    Lawrence Livermore National Laboratory University of California, Livermore, California

    George, D
    Lawrence Livermore National Laboratory University of California, Livermore, California

    Weinzapfel, CL
    Lawrence Livermore National Laboratory University of California, Livermore, California

    Weinzapfel, S
    Lawrence Livermore National Laboratory University of California, Livermore, California

    Pages: 1    Published: Jan 1988


    Abstract

    Five separate laser facilities were used to measure 350-nm and 1064-nm thresholds for bulk damage in crystals of KDP. At 1064-nm, tests were made with single laser pulses having durations of 1, 9 and 25 ns and with 9-ns pulses incident at 10 Hz. At 350-nm test were made with single pulses having durations of 0.6, 5.0 and 25 ns and with 25-nm pulses incident at rates up to 50 Hz. Over the range from 0.6 to 25 ns, 350-nm thresholds increased by a factor of approximately 2, and 350-nm thresholds were almost independent of laser repetition rate. The 1064-nm thresholds increased by a factor > 3 as pulse duration increased from 1 to 25 ns. Laser hardening of thresholds was observed at both 350-nm and 1064-nm.

    Keywords:

    damage threshold, KDP, Laser hardening, pulse length dependence


    Paper ID: STP18552S

    Committee/Subcommittee: F01.02

    DOI: 10.1520/STP18552S


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