Open AccessScanning-free BOTDA based on ultra-fine digital optical frequency comb
Author(s) -
Chi Jin,
Nan Guo,
Yuanhua Feng,
Liang Wang,
Hao Liang,
Jianping Li,
Zhaohui Li,
Yu Chen,
Chao Lu
Publication year - 2015
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.23.005277
Subject(s) - optics , brillouin zone , brillouin scattering , materials science , spectrum analyzer , optical fiber , image resolution , frequency comb , bandwidth (computing) , center frequency , single mode optical fiber , physics , laser , computer science , telecommunications , band pass filter
We realize a scanning-free Brillouin optical time domain analyzer (BOTDA) based on an ultra-fine digital optical frequency comb (DOFC) with 1.95MHz frequency spacing and 2GHz bandwidth. The DOFC can be used to reconstruct the Brillouin gain spectrum (BGS) and locate the Brillouin frequency shift (BFS) without frequency scanning and thus can improve the measurement speed about 100 times compared with the conventional BOTDA. This scanning-free BOTDA scheme has also been demonstrated experimentally with 51.2m spatial resolution over 10km standard single mode fiber (SSMF) and with resolution of 1.5°C for temperature and 43.3με for strain measurement respectively.