Coherent 2 microm differential absorption and wind lidar with conductively cooled laser and two-axis scanning device

Shoken Ishii; Kohei Mizutani; Hirotake Fukuoka; Takayoshi Ishikawa; Baron Philippe; Hironari Iwai; Tetsuo Aoki; Toshikazu Itabe; Atsushi Sato; Kazuhiro Asai

doi:10.1364/AO.49.001809

Coherent 2 microm differential absorption and wind lidar with conductively cooled laser and two-axis scanning device

Appl Opt. 2010 Apr 1;49(10):1809-17. doi: 10.1364/AO.49.001809.

Authors

Shoken Ishii¹, Kohei Mizutani, Hirotake Fukuoka, Takayoshi Ishikawa, Baron Philippe, Hironari Iwai, Tetsuo Aoki, Toshikazu Itabe, Atsushi Sato, Kazuhiro Asai

Affiliation

¹ National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitamachi, Koganei-shi, Tokyo, 184-8795, Japan. sishii@nict.go.jp

PMID: 20357863
DOI: 10.1364/AO.49.001809

Abstract

A coherent 2 microm differential absorption and wind lidar (Co2DiaWiL) was developed to measure CO(2) concentration and line-of-sight wind speed. We conductively cooled a pumping laser head to -80 degrees C and diode arrays to approximately 20 degrees C. A Q-switched laser outputs an energy of 80 mJ (pulse width 150 ns (FWHM), pulse repetition frequency up to 30 Hz). CO(2) measurements made over a column range (487-1986 m) for 5 min accumulation time pairs achieved 0.7% precision. Line-of-sight wind speeds for ranges up to approximately 20 km and returns from a mountainside located 24 km away from the Co2DiaWiL were obtained.