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Proceedings Paper

Development of a fluorescence lidar for measurement of atmospheric formaldehyde
Author(s): Anand Radhakrishnan Mylapore; Mikhail Yakshin; Alexander Achey; In Heon Hwang; Sangwoo Lee; Nikhil Mehta; Geary K. Schwemmer; Coorg R. Prasad; Thomas F. Hanisco
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Paper Abstract

In this paper, we describe the development of a prototype differential absorption fluorescence lidar for nighttime tropospheric formaldehyde (H2CO) concentration profiling. H2CO has a strong absorption band in the 352-357nm region and fluoresces strongly in the 390-500nm region. Here, we obtain high sensitivity (∼0.1ppb) measurements of H2CO profiles from differential fluorescence signals obtained by injection seeding a Nd:YVO laser and tuning its wavelength on and off the peak of a strong absorption line. The fluorescence signal strength is further improved by using a multi-line bandpass filter whose pass-bands are aligned to multiple fluorescence peaks of H2CO. A H2CO filled photo-acoustic absorption cell is utilized for tuning the seed laser wavelength to the center of absorption line.

Paper Details

Date Published: 9 June 2014
PDF: 8 pages
Proc. SPIE 9080, Laser Radar Technology and Applications XIX; and Atmospheric Propagation XI, 90800X (9 June 2014); doi: 10.1117/12.2053420
Show Author Affiliations
Anand Radhakrishnan Mylapore, MassTech Inc. (United States)
Mikhail Yakshin, Science and Engineering Services, Inc. (United States)
Alexander Achey, Science and Engineering Services, Inc. (United States)
In Heon Hwang, Science and Engineering Services, Inc. (United States)
Sangwoo Lee, Science and Engineering Services, Inc. (United States)
Nikhil Mehta, Science and Engineering Services, Inc. (United States)
Geary K. Schwemmer, Science and Engineering Services, Inc. (United States)
Coorg R. Prasad, Science and Engineering Services, Inc. (United States)
Thomas F. Hanisco, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 9080:
Laser Radar Technology and Applications XIX; and Atmospheric Propagation XI
Monte D. Turner; Linda M. Wasiczko Thomas; Gary W. Kamerman; Earl J. Spillar, Editor(s)

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