Title

Moire volume Bragg grating filter with tunable bandwidth

Authors

Authors

S. Mokhov; D. Ott; I. Divliansky; B. Zeldovich;L. Glebov

Comments

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Abbreviated Journal Title

Opt. Express

Keywords

PHOTOSENSITIVE FIBER; EXPOSURE METHOD; Optics

Abstract

We propose a monolithic large-aperture narrowband optical filter based on a moire volume Bragg grating formed by two sequentially recorded gratings with slightly different resonant wavelengths. Such recording creates a spatial modulation of refractive index with a slowly varying sinusoidal envelope. By cutting a specimen at a small angle, to a thickness of one-period of this envelope, the longitudinal envelope profile will shift from a sine profile to a cosine profile across the face of the device. The transmission peak of the filter has a tunable bandwidth while remaining at a fixed resonant wavelength by a transversal shift of incidence position. Analytical expressions for the tunable bandwidth of such a filter are calculated and experimental data from a filter operating at 1064 nm with bandwidth range 30-90 pm is demonstrated. (C) 2014 Optical Society of America

Journal Title

Optics Express

Volume

22

Issue/Number

17

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

20375

Last Page

20386

WOS Identifier

WOS:000340717300071

ISSN

1094-4087

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