Phase sensitive Brillouin scattering measurements with a novel magneto-optic modulator

TL;DR

This paper introduces a novel magnetic modulator based on ferrite film to enhance phase-sensitive Brillouin scattering measurements, improving phase contrast and data quality by reducing optical inhomogeneity effects.

Contribution

The study presents a new magnetic modulator for Brillouin scattering that enhances phase contrast and measurement accuracy compared to previous methods.

Findings

Increased phase contrast in measurements

Reduced influence of optical inhomogeneities

Improved interference pattern quality through data postprocessing

Abstract

A recently reported phase sensitive Brillouin light scattering technique is improved by use of a magnetic modulator. This modulator is based on Brillouin light scattering in a thin ferrite film. Using this magnetic modulator in time- and space Brillouin light scattering measurements we have increased phase contrast and excluded influence of optical inhomogeneities in the sample. We also demonstrate that the quality of the resulting interference patterns can be improved by data postprocessing using the simultaneously recorded information about the reference light.