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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 20 — Jul. 10, 2007
  • pp: 4434–4443

Direct-detection Doppler wind measurements with a Cabannes–Mie lidar: A. Comparison between iodine vapor filter and Fabry–Perot interferometer methods

Chiao-Yao She, Jia Yue, Zhao-Ai Yan, Johnathan W. Hair, Jin-Jia Guo, Song-Hua Wu, and Zhi-Shen Liu  »View Author Affiliations


Applied Optics, Vol. 46, Issue 20, pp. 4434-4443 (2007)
http://dx.doi.org/10.1364/AO.46.004434


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Abstract

Atmospheric line-of-sight (LOS) wind measurement by means of incoherent Cabannes–Mie lidar with three frequency analyzers with nearly the same maximum transmission of 80 % that could be fielded at different wavelengths is analytically considered. These frequency analyzers are (a) a double-edge Fabry–Perot interferometer (FPI) at 1064   nm (IR-FPI), (b) a double-edge Fabry–Perot interferometer at 355   nm (UV-FPI), and (c) an iodine vapor filter (IVF) at 532   nm with two different methods, using either one absorption edge, single edge (se-IVF), or both absorption edges, double edge (de-IVF). The effect of the backscattered aerosol mixing ratio, R b , defined as the ratio of the aerosol volume backscatter coefficient to molecular volume backscatter coefficient, on LOS wind uncertainty is discussed. Assuming a known aerosol mixing ratio, R b , and 100,000 photons owing to Cabannes scattering to the receiver, in shot-noise-limited detection without sky background, the LOS wind uncertainty of the UV-FPI in the aerosol-free air ( R b = 0 ) , is lower by 16 % than that of de-IVF, which has the lowest uncertainty for R b between 0.02 and 0.08; for R b > 0.08 , the IR-FPI yielded the lowest wind uncertainty. The wind uncertainty for se-IVF is always higher than that of de-IVF, but by less than a factor of 2 under all aerosol conditions, if the split between the reference and measurement channels is optimized. The design flexibility, which allows the desensitization of either aerosol or molecular scattering, exists only with the FPI system, leading to the common practice of using IR-FPI for the planetary boundary layer and using UV-FPI for higher altitudes. Without this design flexibility, there is little choice but to use a single wavelength IVF system at 532   nm for all atmospheric altitudes.

© 2007 Optical Society of America

OCIS Codes
(120.2440) Instrumentation, measurement, and metrology : Filters
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
(280.3640) Remote sensing and sensors : Lidar
(290.1090) Scattering : Aerosol and cloud effects

ToC Category:
Remote Sensing

History
Original Manuscript: March 15, 2006
Revised Manuscript: November 21, 2006
Manuscript Accepted: January 19, 2007
Published: June 20, 2007

Citation
Chiao-Yao She, Jia Yue, Zhao-Ai Yan, Johnathan W. Hair, Jin-Jia Guo, Song-Hua Wu, and Zhi-Shen Liu, "Direct-detection Doppler wind measurements with a Cabannes–Mie lidar: A. Comparison between iodine vapor filter and Fabry–Perot interferometer methods," Appl. Opt. 46, 4434-4443 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-20-4434

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