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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 28 — Oct. 1, 2013
  • pp: 6884–6895

Spectrally resolved Raman lidar measurements of gaseous and liquid water in the atmosphere

Fuchao Liu and Fan Yi  »View Author Affiliations


Applied Optics, Vol. 52, Issue 28, pp. 6884-6895 (2013)
http://dx.doi.org/10.1364/AO.52.006884


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Abstract

A spectrally resolved Raman lidar based on a tripled Nd:YAG laser is built for measuring gaseous and liquid water in the atmosphere. A double-grating polychromator with a reciprocal linear dispersion of 0.237nmmm1 is designed to achieve the wavelength separation and the suppression of elastic backscatter. A 32-channel linear-array photomultiplier tube is employed to sample atmospheric Raman water spectrum between 401.65 and 408.99 nm. The lidar-observed Raman water spectrum in the very clear atmosphere is nearly invariable in shape. It is dominated by water vapor, and can serve as background reference for Raman lidar identification of the phase state of atmospheric water under various weather conditions. The lidar has measured also the Raman water spectrum of an aerosol/liquid water layer. The spectrum showed a moderate increase of the signal on both sides of the Q-branch of water vapor. Noting that under clear weather conditions the Raman water spectrum intensity stays at a very low level in the 401.6–404.7 nm range, the Raman water signal in this portion can be used to estimate the liquid water content in the layer.

© 2013 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(010.3640) Atmospheric and oceanic optics : Lidar
(010.7340) Atmospheric and oceanic optics : Water

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: April 29, 2013
Revised Manuscript: August 31, 2013
Manuscript Accepted: September 2, 2013
Published: September 25, 2013

Citation
Fuchao Liu and Fan Yi, "Spectrally resolved Raman lidar measurements of gaseous and liquid water in the atmosphere," Appl. Opt. 52, 6884-6895 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-28-6884

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