Brillouin analysis with 8.8 km range and 2cm resolution

Yosef London, Yair Antman, Nadav Levanon, Avi Zadok

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Brillouin analysis of a 8.8 km-long fiber with 2 cm resolution is reported. Pump and signal are jointly modulated by a binary phase Golomb code. Over 2,000 correlation peaks are simultaneously introduced and interrogated in a single trace. All 440,000 resolution points are covered in just 211 scans of peaks positions. The pump wave is amplitude modulated by a second, 10,000 bits long code. Post-processing of the output signal provides a measurement signal-tonoise ratio that is equivalent to that of 5,000 single-pulse acquisitions. A 7cm-long hot spot is identified. The uncertainty in Brillouin frequency measurements is ±3.5 MHz.

Original languageEnglish
Title of host publication24th International Conference on Optical Fibre Sensors, OFS 2015
EditorsHypolito Jose Kalinowski, Jose Luis Fabris, Wojtek J. Bock
PublisherSPIE
ISBN (Electronic)9781628418392
DOIs
StatePublished - 2015
Event24th International Conference on Optical Fibre Sensors, OFS 2015 - Curitiba, Brazil
Duration: 28 Sep 20152 Oct 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9634
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference24th International Conference on Optical Fibre Sensors, OFS 2015
Country/TerritoryBrazil
CityCuritiba
Period28/09/152/10/15

Keywords

  • All-optical signal processing
  • Optical fiber sensors
  • Phase codes
  • Stimulated brillouin scattering

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