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Proceedings Paper

High spectral contrast filtering produced by multiple pass reflections from paired Bragg gratings in PTR glass
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Paper Abstract

The properties of multiple reflections from narrow bandwidth reflection Bragg gratings are presented. The use of multiple reflections serves to increase the suppression ratio of the out-of-band spectral content such that contributions of grating sidelobes can be mitigated. The result is a device which retains spectral and angular selectivity in a single high efficiency diffraction order but reshapes spectral/angular response to achieve higher signal to noise ratios (SNR). The material for recording these high suppression devices is photo-thermo-refractive (PTR) glass. PTR is a highly homogeneous photosensitive glass with features such as low losses and high laser damage threshold. It has recently been used with good success to record permanent volume Bragg gratings with high efficiency and narrow band selectivity for use in laser cavities. Multiple reflections from the grating surface are achieved using several different arrangements. The multiple pass grating reflections are demonstrated and compared to the performance of a single reflection from a volume Bragg grating.

Paper Details

Date Published: 7 March 2014
PDF: 6 pages
Proc. SPIE 8982, Optical Components and Materials XI, 898210 (7 March 2014); doi: 10.1117/12.2039700
Show Author Affiliations
Daniel Ott, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Marc SeGall, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Ivan Divliansky, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
George Venus, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Leonid Glebov, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 8982:
Optical Components and Materials XI
Michel J. F. Digonnet; Shibin Jiang, Editor(s)

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