Authors

Presenter(s)

Zayne M. Parsons

Files

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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 Posters, College of Arts and Sciences

Refractive Index of Photo-thermo-refractive Glass

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