Remote methane sensor using tuneable diode laser spectroscopy (TDLS) via a 1W Raman source

D. Mitchell, K. Duffin, W. Johnstone

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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
JournalProceedings of SPIE the International Society for Optical Engineering
Volume7503
Issue number750350
DOIs
Publication statusPublished - Oct 2009

Keywords

  • remote methane sensor
  • TDLS
  • tuneable diode laser spectroscopy

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