An open-path, hand-held laser system for the detection of methane gas
| dc.contributor.author | van Well, Ben | |
| dc.contributor.author | Murray, Stuart | |
| dc.contributor.author | Hodgkinson, Jane | |
| dc.contributor.author | Pride, Russ D. | |
| dc.contributor.author | Strzoda, Rainer | |
| dc.contributor.author | Gibson, Graham | |
| dc.contributor.author | Padgett, Miles | |
| dc.date.accessioned | 2006-10-02T14:00:39Z | |
| dc.date.available | 2006-10-02T14:00:39Z | |
| dc.date.issued | 2005-06 | |
| dc.description.abstract | We have developed an open-path hand-held gas detector incorporating a distributed feedback InGaAs laser diode at 1.65 µm. Incorporated into a hand-held transceiver unit, the emitted laser beam is backscattered from nearby surfaces, collected and focused onto an amplified InGaAs detector using a 150 mm diameter plastic Fresnel lens. At ranges of 4–5 m, a typical backscattered signal is tens of nanowatts of laser light. Applying second derivative wavelength modulation spectroscopy gives a sensitivity to methane of better than 10 parts per million over a one metre path length. A number of demonstration units have been fabricated and successfully evaluated by end users. | en |
| dc.format.extent | 742661 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.citation | van Well B, Murray S, Hodgkinson J, et al., (2005) An open-path, hand-held laser system for the detection of methane gas. Journal of Optics A: Pure and Applied Optics Volume 7, Issue 6, pp. S420-S424 | en |
| dc.identifier.issn | 1464-4258 | |
| dc.identifier.uri | http://hdl.handle.net/1826/1198 | |
| dc.identifier.uri | http://dx.doi.org/10.1088/1464-4258/7/6/025 | |
| dc.language.iso | en | en |
| dc.publisher | Institute of Physics | en |
| dc.subject | methane | en |
| dc.subject | wavelength modulation spectroscopy | en |
| dc.subject | instrumentation | en |
| dc.subject | infrared spectroscopy | en |
| dc.subject | remote detection | en |
| dc.title | An open-path, hand-held laser system for the detection of methane gas | en |
| dc.type | Article | en |