Open AccessDemonstration of the 1.53-µm coherent DIAL for simultaneous profiling of water vapor density and wind speed
Author(s) -
Masaharu Imaki,
Hisamichi Tanaka,
Kenichi Hirosawa,
Takayuki Yanagisawa,
Shumpei Kameyama
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.400331
Subject(s) - dial , optics , wavelength , lidar , materials science , water vapor , laser , attenuation coefficient , physics , meteorology , acoustics
The 1.53-µm coherent differential absorption lidar (DIAL) is demonstrated for the simultaneous profiling of water vapor (H 2 O) density and wind speed. The optical setup is fiber-based. The wavelength locking circuit can achieve precise locking of 13.0 MHz by the combination of the line center locking to the hydrogen cyanide (HCN) absorption line and offset locking to the H 2 O absorption wavelength. The measurable range for the simultaneous profiling is up to 1.2 km. The DIAL-measured H 2 O density is compared with the one measured by an in-situ sensor. Qualitative good agreement is shown with the random error of 0.56 g/m 3 .