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Proceedings Paper

Design and testing of a compact diode-laser-based differential absorption lidar (DIAL) for water vapor profiling in the lower troposphere
Author(s): Amin R. Nehrir; Kevin S. Repasky; John L. Carlsten
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Paper Abstract

A compact, widely tunable semiconductor based water vapor differential absorption lidar (DIAL) has been built and tested at Montana State University (MSU). The laser transmitter uses a tunable external cavity diode laser (ECDL) with a center wavelength of 830 nm to injection seed two cascaded tapered semiconductor optical amplifier (SOA), producing 1.5 micro joule pulses at a pulse repetition rate and pulse width duration of 20 kHz and 1000 ns respectively, allowing for water vapor number density retrievals up to approximately 4 km. Water vapor number density profiles collected with the MSU water vapor DIAL will be compared with co-located radiosonde measurements, demonstrating the instruments ability to measure daytime and nighttime water vapor profiles in the lower troposphere.

Paper Details

Date Published: 11 August 2009
PDF: 12 pages
Proc. SPIE 7460, Lidar Remote Sensing for Environmental Monitoring X, 746005 (11 August 2009); doi: 10.1117/12.824900
Show Author Affiliations
Amin R. Nehrir, Montana State Univ. (United States)
Kevin S. Repasky, Montana State Univ. (United States)
John L. Carlsten, Montana State Univ. (United States)


Published in SPIE Proceedings Vol. 7460:
Lidar Remote Sensing for Environmental Monitoring X
Upendra N. Singh, Editor(s)

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