Nonlinear photosensitivity of photo-thermo-refractive glass by high intensity laser irradiation

    Authors

    L. A. Siiman; J. Lumeau;L. B. Glebov

    Comments

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    Abbreviated Journal Title

    J. Non-Cryst. Solids

    Keywords

    laser-matter interactions; lasers; non-linear optics; photoinduced; effects; ultrafast processes and measurements; oxide glasses; SILICATE-GLASSES; PHOTOTHERMOREFRACTIVE GLASS; Materials Science, Ceramics; Materials Science, Multidisciplinary

    Abstract

    Photo-thermo-refractive (PTR) glass is a material for high-efficiency phase volume hologram recording which possesses linear photosensitivity in the near UV region from 280 to 350 nm. In this paper nonlinear photosensitivity by 355 nm nanosecond pulses with intensity exceeding 1 MW/cm(2) and by 783 nm femtosecond pulses with intensity exceeding 1 TW/cm(2) is demonstrated. No photo-sensitizers are necessary in PTR glass for nonlinear photosensitivity. Photosensitivity by 355 nm nanosecond pulses is determined by glass matrix ionization resulting from two-photon absorption of incident radiation by glass matrix. Photosensitivity by 783 nm femtosecond pulses is determined by glass matrix ionization from nonlinear interaction of fundamental radiation and supercontinuum with modified glass matrix due to strong electric fields of incident radiation. (C) 2008 Elsevier B.V. All rights reserved.

    Journal Title

    Journal of Non-Crystalline Solids

    Volume

    354

    Issue/Number

    34

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    4070

    Last Page

    4074

    WOS Identifier

    WOS:000259621800007

    ISSN

    0022-3093

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