Open AccessSimplified Brillouin optical time-domain sensor based on direct modulation of a laser diode
Author(s) -
Kwang Yong Song,
Sora Yang
Publication year - 2010
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.18.024012
Subject(s) - brillouin zone , optics , modulation (music) , brillouin scattering , time domain , laser diode , materials science , optical time domain reflectometer , optical fiber , intensity modulation , laser , diode , microwave , phase modulation , optical modulation amplitude , fiber optic sensor , optoelectronics , physics , optical amplifier , polarization maintaining optical fiber , computer science , phase noise , acoustics , computer vision , quantum mechanics
We propose and experimentally demonstrate a novel kind of Brillouin optical time-domain sensor based on direct modulation of a laser diode (LD) which is free from the use of any microwave device. The Brillouin pump and the probe waves are alternately generated by the LD modulation, and an optical time-domain analysis adopted for distributed measurement. Maps of Brillouin frequency shift are obtained with a spatial resolution of 2 m and an accuracy of ±2 MHz in a 2 km optical fiber.