Remote gas detection using tunable diode laser spectroscopy with high power rare earth and raman fibre amplifiers

W. Johnstone, K. Duffin, David Michael Mitchell

Research output: Contribution to conferencePaper


We report a long-range optical methane sensor to enable remote detection of gas leaks from pipelines and other infra-structure. The system, based on back-scatter from a target surface (e.g. the ground around a pipeline), tuneable diode laser spectroscopy (TDLS) and a high power fibre Raman amplifier, can detect a 1 m cloud of methane with a concentration of 100ppm at a distance of 200m.
Original languageEnglish
Publication statusUnpublished - Dec 2008
EventPhotonics 2008: International Conference on Fiber Optics and Photonics - New Delhi, India
Duration: 13 Dec 200817 Dec 2008


ConferencePhotonics 2008: International Conference on Fiber Optics and Photonics
CityNew Delhi, India


  • optical methane sensor
  • remote gas detection
  • gas leaks
  • tuneable diode laser spectroscopy
  • TDLS
  • Raman amplifier

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