Abstract

A dual-wavelength locking technique for coherent 2-µm differential absorption lidar (DIAL) applications has been developed for simultaneously measuring water vapor (${{\rm{H}}_2}{\rm{O}}$) and radial wind velocity profiles. The two wavelengths for DIAL measurement were stabilized by sidebands of an electro-optic modulated laser, which was locked to the ${{\rm{CO}}_2}$ R30 absorption line. We selected wavelengths of 2050.550 and 2051.103 nm to minimize the effects of height-dependent temperature and pressure variations. The long-term wavelength stability of the two locked lasers of ${\lt}{0.2}\;{\rm{pm}}$, which corresponds to 14 MHz, was achieved. The DIAL instrument using the developed technique meets the requirement of measuring the ${{\rm{H}}_2}{\rm{O}}$ concentration with a systematic error ${\lt} {{5}}\%$ below an altitude of 5 km.

© 2021 Optical Society of America

Evaluation of a coherent 2-µm differential absorption lidar for water vapor and radial wind velocity measurements

Hironori Iwai and Makoto Aoki
Opt. Express 31(9) 13817-13836 (2023)

Wavelength selection and measurement error theoretical analysis on ground-based coherent differential absorption lidar using 1.53 µm wavelength for simultaneous vertical profiling of water vapor density and wind speed

Masaharu Imaki, Kenichi Hirosawa, Takayuki Yanagisawa, Shumpei Kameyama, and Hiroaki Kuze
Appl. Opt. 59(8) 2238-2247 (2020)

Coherent differential absorption lidar measurements of CO₂

Grady J. Koch, Bruce W. Barnes, Mulugeta Petros, Jeffrey Y. Beyon, Farzin Amzajerdian, Jirong Yu, Richard E. Davis, Syed Ismail, Stephanie Vay, Michael J. Kavaya, and Upendra N. Singh
Appl. Opt. 43(26) 5092-5099 (2004)

Side-line tunable laser transmitter for differential absorption lidar measurements of CO₂: design and application to atmospheric measurements

Grady J. Koch, Jeffrey Y. Beyon, Fabien Gibert, Bruce W. Barnes, Syed Ismail, Mulugeta Petros, Paul J. Petzar, Jirong Yu, Edward A. Modlin, Kenneth J. Davis, and Upendra N. Singh
Appl. Opt. 47(7) 944-956 (2008)

2.05-µm all-fiber laser source designed for CO₂ and wind coherent lidar measurement

Julien Lahyani, Julien Le Gouët, Fabien Gibert, and Nicolas Cézard
Appl. Opt. 60(15) C12-C19 (2021)