Development of coherent 2-&#956;m differential absorption and wind lidar with laser frequency offset locking technique

S. Ishii; K. Mizutani; H. Fukuoka; T. Ishikawa; P. Baron; H. Iwai; T. Aoki; T. Itabe; A. Sato; K. Asai

doi:10.1117/12.871327

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28 October 2010 Development of coherent 2-μm differential absorption and wind lidar with laser frequency offset locking technique

S. Ishii, K. Mizutani, H. Fukuoka, T. Ishikawa, P. Baron, H. Iwai, T. Aoki, T. Itabe, A. Sato, K. Asai

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Proceedings Volume 7860, Lidar Remote Sensing for Environmental Monitoring XI; 786004 (2010) https://doi.org/10.1117/12.871327
Event: SPIE Asia-Pacific Remote Sensing, 2010, Incheon, Korea, Republic of

Abstract

We developed a coherent 2-μm differential absorption and wind lidar to measure CO₂ concentration and line-of-sight wind speed. The wavelength of on-line laser was set at the R30 absorption line center of CO₂ and the atmospheric transmission for the on-line backscattered signal caused by CO₂ is large. Measurable range of CO₂ measurement was limited. A laser frequency offset locking system was installed into the laser system to improved measurable range of CO₂ measurement. Two single-frequency continuous wave lasers are used for the laser frequency offset locking. One laser (center, λ_Center) of the two continuous lasers is directly locked to the R30 absorption line center of CO₂ and the other (on-line, λ_On) is frequency-shifted to λ_Center laser. Although long-range CO₂ measurement depends on the laser frequency offset, the installation of the laser frequency offset realized vertical CO₂ measurement in a range of up to the upper troposphere.

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S. Ishii, K. Mizutani, H. Fukuoka, T. Ishikawa, P. Baron, H. Iwai, T. Aoki, T. Itabe, A. Sato, and K. Asai "Development of coherent 2-μm differential absorption and wind lidar with laser frequency offset locking technique", Proc. SPIE 7860, Lidar Remote Sensing for Environmental Monitoring XI, 786004 (28 October 2010); https://doi.org/10.1117/12.871327

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