Coherent 2 microm differential absorption and wind lidar with conductively cooled laser and two-axis scanning device.
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.
Ishii
Shoken
S
National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitamachi, Koganei-shi, Tokyo, 184-8795, Japan. sishii@nict.go.jp
Mizutani
Kohei
K
Fukuoka
Hirotake
H
Ishikawa
Takayoshi
T
Philippe
Baron
B
Iwai
Hironari
H
Aoki
Tetsuo
T
Itabe
Toshikazu
T
Sato
Atsushi
A
Asai
Kazuhiro
K