Affiliation:
1. Graduate School of Engineering and Science Shibaura Institute of Technology Tokyo Japan
2. Institute of Innovative Research Tokyo Institute of Technology Yokohama Japan
3. Faculty of Engineering Yokohama National University Yokohama Japan
Abstract
AbstractThe authors present a streamlined setup for Brillouin scattering observation, which negates the need for an independent reference path by incorporating a variable reflectivity mirror at the terminus of the sensing fibre. The authors’ study uncovers an optimal reflectivity point, specifically at −9 dB, where the signal‐to‐noise ratio (SNR) of the observed Brillouin gain spectrum (BGS) reaches its zenith, approximately doubling the SNR of a conventional simplified setup that utilises Fresnel reflection. Furthermore, the authors elucidate that this setup inherently mitigates the polarisation‐dependent fluctuations of the BGS.
Funder
Precise Measurement Technology Promotion Foundation
Japan Society for the Promotion of Science
Publisher
Institution of Engineering and Technology (IET)
Subject
Electrical and Electronic Engineering