Sangac interferometer on the holographic bragg grating

TL;DR

This paper presents a Sagnac interferometer utilizing a holographic Bragg grating as a beamsplitter, demonstrating its normal operation conditions and experimental validation of phase shift control at the Bragg wavelength.

Contribution

It introduces a novel Sagnac interferometer design using a holographic Bragg grating for beam splitting and phase control, with experimental validation.

Findings

Achieved phase shift of 180° at the central Bragg wavelength.

Validated the interferometer's normal operation conditions.

Demonstrated effective diffraction splitting with holographic grating.

Abstract

The ring interferometer with zero optical path difference known as Sagnac one is offered with a diffraction splitting of the entering light beam. As the beamsplitter, a transmission holographic Bragg grating is used. Conditions of normal operation of this interferometer achieve under the equal intensity of beam copies and the adjustable phase shift between them in its two interferometer shoulders. These conditions are met with the holographic grating, which provides the phase shift 180^0 on the central Bragg wavelength. Experimental approbation of the modified interferometer validates the expected results.