Phase Fresnel lens recorded in photo-thermo-refractive glass by selective exposure to infrared ultrashort laser pulses

    Authors

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

    Comments

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    Abstract

    A new two-step approach for fabricating phase optical elements in photo-thermo-refractive glass by exposure to IR ultrashort laser pulses followed by thermal development is shown. A binary phase Fresnel lens was designed to focus light at 632.8 nm to a focal length of 400 cm. Conditions of ultrashort pulse irradiation and thermal development were chosen to achieve pi phase shift between zone boundaries. The focusing efficiency of the element was measured to be close to 50%. (C) 2008 Optical Society of America

    Journal Title

    Optics Letters

    Volume

    34

    Issue/Number

    1

    Publication Date

    1-1-2009

    Document Type

    Article

    First Page

    40

    Last Page

    42

    WOS Identifier

    WOS:000262889300014

    ISSN

    0146-9592

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