Related Experiment Video
Updated: Feb 10, 2026

Preparation of Extracellular Matrix Protein Fibers for Brillouin Spectroscopy
Published on: September 15, 2016
Refractive index sensing by Brillouin scattering in side-polished optical fibers
Abstract:
In this Letter, we demonstrate the possibility to measure the refractive index of a liquid, using the stimulating Brillouin scattering in a 3-cm-long side-polished optical fiber. In addition, we show that by depositing a high-refractive index layer on the polished surface the sensitivity of the Brillouin frequency shift (BFS) can be increased due to a higher penetration of the evanescent field in the outer medium. Experiments show a maximum BFS change of about 11 MHz when varying the refractive index of the external medium from 1 (air) to 1.402, and a BFS sensitivity to refractive index of about 293 MHz/RIU around 1.40.
Related Concept Videos
The Sense of Self: Reflected Self-Appraisal and Social Comparison
Introduction to Special Senses
Scatter Plot
Classification of Skeletal Muscle Fibers
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
Tactile and Chemical Senses
Influence of Earth's Curvature and Atmospheric Refraction on Leveling

