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

Fingerprint

Laser Spectroscopy
Laser spectroscopy
Diode Laser
Methane
Raman
laser spectroscopy
Semiconductor lasers
methane
amplifiers
diodes
Fresnel Lens
DFB Laser
Fresnel lenses
Sensor
Natural Gas
sensors
Sensors
Laser Diode
natural gas
Extrapolation

Keywords

  • remote methane sensor
  • TDLS
  • tuneable diode laser spectroscopy

Cite this

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Remote methane sensor using tuneable diode laser spectroscopy (TDLS) via a 1W Raman source. / Mitchell, D.; Duffin, K.; Johnstone, W.

In: Proceedings of SPIE the International Society for Optical Engineering, Vol. 7503, No. 750350, 10.2009.

Research output: Contribution to journalArticle

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