Localized Chemical Detection in Quasi-Distributed Multi-Node Fiber-Ring Network

Michal Nikodem, Gerard Wysocki

Research output: Contribution to journalArticle

Abstract

Laser-based molecular spectroscopy plays an important role in chemical analysis and gas detection. Here we present how optical spectroscopy can be combined with quasi-distributed fiber-based passive sensing networks. Simultaneous gas detection and localization is demonstrated using photothermal interferometry at 1.55 μm. With heterodyne-based signal retrieval sensor node position can be determined through measurement of phase/time delay of photothermal signal. This is performed using simple and passive network configuration. Proof-of-concept experiments are presented in which distance resolving power of approximately 5 meters was achieved with 1 second integration time. System performance, limitations, and capabilities are analyzed and discussed.

Original languageEnglish (US)
Article number8419245
Pages (from-to)5921-5926
Number of pages6
JournalJournal of Lightwave Technology
Volume36
Issue number24
DOIs
StatePublished - Dec 15 2018

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Keywords

  • Distributed sensing
  • molecular spectroscopy
  • optical sensors

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