Presenter(s)

    Zayne M. Parsons

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    Description

    Volume Bragg gratings (VBGs) are spectrally-selective elements used in spectral beam combining, which is used to combine multiple beams with slightly different wavelengths into a single output. VBGs are created by exposing photo-thermo-refractive (PTR) glass to interference patterns of UV laser radiation, and then annealing the glass, producing a modulated refractive index. The diffraction efficiency of these gratings is dependent on the refractive index modulation amplitude. We report the refractive indices of unprocessed and processed PTR glass at wavelengths from 0.4 to 4.6 microns and discuss their uses in specifying VBGs for laser beam combining.

    Publication Date

    4-22-2020

    Project Designation

    Independent Research

    Primary Advisor

    Said Elhamri

    Primary Advisor's Department

    Physics

    Keywords

    Stander Symposium project, College of Arts and Sciences

    Refractive Index of Photo-thermo-refractive Glass

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