Remote methane sensor using Tunable Diode Laser Spectroscopy (TDLS) via a 1W Raman So

D.M. Mitchell, K. Duffin, W. Johnstone

Research output: Contribution to conferencePaper

8 Citations (Scopus)


We report a long-range near-IR methane sensor for inspection of natural gas collection, storage sites and pipeline networks. The principle is that a laser carrier beam is directed at the target surface across a test path and the backscatter from the surface is collected via a large Fresnel lens onto the photoreceiver. A Raman amplifier has been designed to amplify the TDLS optical signal generated by a 1650.95nm DFB laser diode to over 1W CW. Combining the high power output of the Raman amplifier and the highly sensitive TDLS technique, we may report 100ppm.m sensitivity at more than 100m by extrapolation.
Original languageEnglish
Publication statusPublished - Sep 2009
Event20th International Conference on Optical Fibre Sensors - Edinburgh, United Kingdom
Duration: 5 Oct 2009 → …


Conference20th International Conference on Optical Fibre Sensors
CountryUnited Kingdom
Period5/10/09 → …


  • optical fibre sensors
  • tunable diode laser spectroscopy
  • TDLS

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