Coherent-detection-assisted BOTDA system without averaging using single-sideband modulated local oscillator signal

Nan Guo, Liang Wang, Chao Jin, Tao Gui, Kangping Zhong, Xian Zhou, Jinhui Yuan, Changyuan Yu, Hwa Yaw Tam, Chao Lu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

A novel setup for coherent-detection-assisted Brillouin optical time domain analysis (BOTDA) is proposed and demonstrated. Performance enhancement is enabled by a power-controllable local oscillator (LO) generated using single-side-band (SSB) modulation. Through employing a commercial coherent receiver and polarization diversity scheme, the Brillouin gain traces carried on a stable intermediate frequency (IF) are obtained in real time without any averaging and processed by digital signal processing (DSP) without the need of ultra-narrow optical band pass filter. A spatial resolution of 4 m and frequency uncertainty of 1.473 MHz are achieved over 40 km sensing range using a single scan.
Original languageEnglish
Title of host publication25th International Conference on Optical Fiber Sensors
PublisherSPIE
Volume10323
ISBN (Electronic)9781510610910
DOIs
Publication statusPublished - 1 Jan 2017
Event25th International Conference on Optical Fiber Sensors, OFS 2017 - Jeju, Korea, Republic of
Duration: 24 Apr 201728 Apr 2017

Conference

Conference25th International Conference on Optical Fiber Sensors, OFS 2017
CountryKorea, Republic of
CityJeju
Period24/04/1728/04/17

Keywords

  • BOTDA
  • Coherent detection
  • Digital signal processing
  • Distributed fiber sensor
  • Stimulated Brillouin scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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