Performance assessment of a coherent DIAL-Doppler fiber lidar at 1645 nm for remote sensing of methane and wind
Optics Express, ISSN: 1094-4087, Vol: 28, Issue: 15, Page: 22345-22357
2020
- 34Citations
- 24Captures
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Metrics Details
- Citations34
- Citation Indexes34
- 34
- CrossRef30
- Captures24
- Readers24
- 24
Article Description
We report on the performances of a coherent DIAL/Doppler fiber lidar called VEGA, allowing for simultaneous measurements of methane and wind atmospheric profiles. It features a 10µJ, 200 ns, 20 kHz fiber pulsed laser emitter at 1645 nm, and it has been designed to monitor industrial methane leaks and fugitive emissions in the environment. The system performance has been assessed for range-resolved (RR) and integrated-path (IP) methane measurements in natural background conditions (i.e. ambient methane level). For RR measurements, the measured Allan deviation at τ=10 s is in the range of 3-20 ppm, depending of the aerosol load, at a distance of 150 m, with 30 m range resolution, and a beam focused around 150-200 m. For IP measurements, using a natural target at 2.2 km of distance, the Allan deviation at τ=10 s is in the range of 100-200 ppb. In both cases, deviation curves decrease as τ/, up to 1000 seconds for the longest averaging time. Finally, the lidar ability to monitor an industrial methane leak is demonstrated during a field test.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85089131990&origin=inward; http://dx.doi.org/10.1364/oe.394553; http://www.ncbi.nlm.nih.gov/pubmed/32752499; https://opg.optica.org/abstract.cfm?URI=oe-28-15-22345; https://dx.doi.org/10.1364/oe.394553; https://opg.optica.org/oe/fulltext.cfm?uri=oe-28-15-22345&id=433482
Optica Publishing Group
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