355-nm direct-detection Doppler wind lidar for vertical atmospheric motion measurement

Shoken Ishii, Kodai Kishibuchi, Hideki Takenaka, Yoshitaka Jin, Tomoaki Nishizawa, Nobuo Sugimoto, Hironari Iwai, Makoto Aoki, Seiji Kawamura, Hajime Okamoto

Research output: Contribution to journalArticlepeer-review

Abstract

A compact and simple 355-nm direct-detection Doppler wind lidar (DDDWL) was developed to measure the line-of-sight (LOS) wind speed of the background atmosphere from atmospheric molecule return signals with and without aerosols and clouds. A receiver design with a Fabry–Perot etalon interferometer (FPEI) without an inside deposited step coating or fiber coupling is considered for the DDDWL using the double-edge technique. The receiver with the double-edge technique uses a FPEI and wedge prism to form a double-edge filter. The development of the double-edge filter in this combination is, to the best of our knowledge, an improvement at 355-nm wavelength. Considerations for the DDDWL receiver with a FPEI revealed that a full-angle light beam divergence into the FPEI and a working FPEI aperture are significant factors for the receiver design. Preliminary experimental evaluation demonstrated that the DDDWL had the potential of LOS wind speed measurements with a random error of less than 1 m/s when the signal-to-noise ratio was approximately 300. The DDDWL-measured vertical LOS wind speed profile was consistent with that of a 2-µm coherent Doppler wind lidar within the measurement error range. The preliminary experimental LOS wind measurement results demonstrated the capability of the DDDWL to measure low LOS wind speeds.

Original languageEnglish
Pages (from-to)7925-7936
Number of pages12
JournalApplied Optics
Volume61
Issue number27
DOIs
Publication statusPublished - Sep 20 2022
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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