STP799

    The Use of Self-Focusing in the Prevention of Laser-Induced Damage

    Published: Jan 1983


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    Abstract

    Laser-induced breakdown in thin foils and gasses have been used to limit transmission at high laser powers in order to prevent damage to sensitive optical components in complex laser systems. In this paper we report results of using self-focusing in liquids to produce laser-induced breakdown and phase aberrations which in turn limit the transmitted power. Optical self-action in CS2 and other liquids was used to make a power limiting device with psec response time. This device has linear response near unity transmission for input power below PC, which is of the order of the critical power for self-focusing, and limits the transmitted power to a nearly constant value for input power greater than PC. The onset of nonlinear transmission was adjusted by mixing various liquids to adjust n2. Experimental results using linearly and circularly polarized, 40 psec (FWHM) pulses at 1.06 μm are presented.

    Keywords:

    self-focusing, laser-induced breakdown, nonlinear absorption, nonlinear refraction, Kerr liquids


    Author Information:

    Soileau, MJ
    Center for Applied Quantum Electronics Department of Physics, North Texas State University, Denton, Texas

    Williams, WE
    Center for Applied Quantum Electronics Department of Physics, North Texas State University, Denton, Texas

    Van Stryland, EW
    Center for Applied Quantum Electronics Department of Physics, North Texas State University, Denton, Texas

    Brown, SF
    Center for Applied Quantum Electronics Department of Physics, North Texas State University, Denton, Texas


    Paper ID: STP37283S

    Committee/Subcommittee: F01.02

    DOI: 10.1520/STP37283S


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