BOTDA sensor utilizing digital optical frequency comb based phase spectrum measurement

Chao Jin, Liang Wang, Yuli Chen, Nan Guo, Changyuan Yu, Zhaohui Li, Chao Lu

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

2 Citations (Scopus)


An Ultra-Fast Sweep-Free distributed BOTDA sensor is proposed and experimentally demonstrated employing coherent de-modulation of digital optical frequency comb (DOFC) probe signal. The phase shift of each frequency tone induced during the Stimulated Brillouin Scattering (SBS), corresponding to the Brillouin Phase Spectrum (BPS), is simultaneously measured in a single shot without frequency sweeping and averaging. We demonstrate an ultra-fast BOTDA sensor in10km long fiber with the measurement time of 10 ìs, which is depending on the time-of-flight of the fiber. The minimum detectable fiber length is 51.2m with a 1.95 MHz frequency resolution among 1 GHz sensing coverage. The BFS uncertainty of our ultra-fast BOTDA using BPS is calculated to be~1.5 MHz near the end of fiber under test (FUT), which is significantly improved by ~50% compared with that using BGS.
Original languageEnglish
Title of host publication2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017
Number of pages3
ISBN (Electronic)9781509062904
Publication statusPublished - 22 Nov 2017
Event2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017 - Singapore, Singapore
Duration: 31 Jul 20174 Aug 2017


Conference2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017


  • Fiber Optics Sensors
  • Nonlinear Optics
  • Scattering
  • Stimulated Brillouin

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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