Open AccessEnhanced sensitivity of fiber laser sensor with Brillouin slow light
Author(s) -
Kai Qian,
Fan Wang,
Rui Wang,
Shenglai Zhen,
Xuqiang Wu,
Guojie Tu,
Tingting Zhang,
Benli Yu,
Li Zhan
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.025485
Subject(s) - optics , brillouin scattering , interferometry , sensitivity (control systems) , materials science , brillouin zone , optical fiber , fiber optic sensor , laser , slow light , physics , photonic crystal , electronic engineering , engineering
We proposed and experimentally demonstrated a new scheme for enhancing the sensitivity of a fiber laser sensor using Brillouin slow light. The Brillouin laser was exposed to environmental vibrations, producing fluctuations at 408 kHz frequency, which were then interrogated using a Mach-Zehnder interferometer. By introducing Brillouin slow light into one arm of the interferometer, the sensitivity increased by 1.57 times that of a device without slow light. We believe this scheme may provide a new way of using Brillouin slow light and that it has some important implications regarding the use of fiber sensors for measuring the vibration, temperature, strain and so on.