High-Contrast Filtering By Multipass Diffraction Between Paired Volume Bragg

Abstract

High-contrast filtering via multiple reflections between matched volume Bragg gratings (VBGs) is demonstrated. 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 that retains spectral and angular selectivity and diffracts light into a single order with high efficiency but reshapes the spectral/angular response to achieve higher signal-to-noise ratios. We demonstrate that multipass spectral filters can be recorded with extremely high suppression ratios using reflecting Bragg gratings (RBGs) in three different configurations. These filters demonstrate roll-offs of over 150 dB/nm. Similarly, we demonstrate angular filtering by multipass transmitting gratings.

Publication Date

11-1-2015

Publication Title

Applied Optics

Volume

54

Issue

31

Number of Pages

9065-9070

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/AO.54.009065

Socpus ID

84964626511 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84964626511

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