Design and testing of a compact diode-laser-based differential absorption lidar (DIAL) for water vapor profiling in the lower troposphere

Amin R. Nehrir; Kevin S. Repasky; John L. Carlsten

doi:10.1117/12.824900

11 August 2009 Design and testing of a compact diode-laser-based differential absorption lidar (DIAL) for water vapor profiling in the lower troposphere

Amin R. Nehrir, Kevin S. Repasky, John L. Carlsten

Author Affiliations +

Proceedings Volume 7460, Lidar Remote Sensing for Environmental Monitoring X; 746005 (2009) https://doi.org/10.1117/12.824900
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

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.

Citation Download Citation

Amin R. Nehrir, Kevin S. Repasky, and John L. Carlsten "Design and testing of a compact diode-laser-based differential absorption lidar (DIAL) for water vapor profiling in the lower troposphere", Proc. SPIE 7460, Lidar Remote Sensing for Environmental Monitoring X, 746005 (11 August 2009); https://doi.org/10.1117/12.824900

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