STP1028

    Laser Induced Damage of Dielectric Phase Retardation Mirrors at 1.064 Microns

    Published: Jan 1988


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    Abstract

    Dielectric phase retarders are frequently used in high power laser systems for cutting and welding. The phase shift is commonly achieved by total reflection or optical tunneling.

    In this paper laser induced damage thresholds of plane phase retardation mirrors are measured using single 14 ns Nd-YAG laser pulses. The results are compared to the properties of the corresponding nonshifting deflectors. We investigated in stacks of Titania, Tantala, Hafnia and Zirconia in conjunction with Silica designed for retardation angles of 45° and 90°. Laser induced damage thresholds are related to the field strength distribution in the layers.

    Keywords:

    Phase retarding mirrors, standing wave field, oxide materials, Titania, Tantala, Silica, laser damage


    Author Information:

    Ristau, D
    Institut für Quantenoptik, Universität Hannover, Hannover,

    Akhtar, SMJ
    DAAD fellow, the Pakistan Institute for Nuclear Science and Technology, Islamabad,

    Ebert, J
    Institut für Quantenoptik, Universität Hannover, Hannover,


    Paper ID: STP18568S

    Committee/Subcommittee: F01.10

    DOI: 10.1520/STP18568S


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