Demonstration of coherent differential absorption lidar for wind and water vapor measurements using high-precision wavelength stabilization circuit

Kenya Yano; Eisuke Haraguchi; Hidenobu Tsuji; Masaharu Imaki; Satoru Yoshida; Tetsu Sakai; Tomohiro Nagai; Masahide Nishihashi; Eiji Oikawa; Shingo Shimizu; Takeshi Maesaka; Koichi Shiraishi

doi:10.1051/epjconf/202636214003

Open Access

Issue		EPJ Web Conf. Volume 362, 2026 31^st International Laser Radar Conference (ILRC 31) Held Together with the 22^nd Coherent Laser Radar Conference (CLRC 22)


Article Number		14003
Number of page(s)		4
Section		CLRC Coherent DIAL, DISC and Aerosol Lidar
DOI		https://doi.org/10.1051/epjconf/202636214003
Published online		09 April 2026

EPJ Web of Conferences 362, 14003 (2026)
https://doi.org/10.1051/epjconf/202636214003

Demonstration of coherent differential absorption lidar for wind and water vapor measurements using high-precision wavelength stabilization circuit

Kenya Yano^(a), Eisuke Haraguchi^(a), Hidenobu Tsuji^(a), Masaharu Imaki^(a), Satoru Yoshida^(b), Tetsu Sakai^(b), Tomohiro Nagai^(b), Masahide Nishihashi^(b), Eiji Oikawa^(b), Shingo Shimizu^(c), Takeshi Maesaka^(c) and Koichi Shiraishi^(d)

^(a) Mitsubishi Electric Corporation, Information Technology R&D Center 5-1-1 Ofuna, Kamakura, Kanagawa, Japan, 247-8501
^(b) Meteorological Research Institute, Japan Meteorological Agency, 1-1 Nagamine, Tsukuba, Ibaraki, 305-0052, Japan
^(c) National Research Institute for Earth Science and Disaster Resilience, 3-1 Tennodai, Tsukuba-shi, Ibaraki, 305-0006, Japan
^(d) Fukuoka University, 8-19-1 Nanakuma, Jonan-ku Fukuoka 814-0180, Japan This email address is being protected from spambots. You need JavaScript enabled to view it.

Published online: 9 April 2026

Abstract

We have developed a differential absorption lidar (DIAL) that simultaneously measures water vapor and wind for heavy rain forecasting. In this paper, we summarize the development of a wavelength control unit that takes environmental resistance into consideration and the demonstration results of water vapor and wind lidar. Temperature tests of the wavelength stabilization circuit were conducted, and it is confirmed that the circuit was stable within 0 - 60°C with a frequency stability of ±10MHz and verify the performance of the DIAL with the prototype wavelength stabilization circuit. The DIAL was installed outdoors to measure water vapor in the vertical path. As a result of comparison with radiosonde measured in the same area, we confirmed that the accuracy was equivalent to the target measurement accuracy (2 g/m³ or less).

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