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Proceedings Paper

Studies of a mesospheric sodium guidestar pumped by continuous-wave sum-frequency mixing of two Nd:YAG laser lines in lithium triborate
Author(s): John Telle; Jack Drummond; Craig Denman; Paul Hillman; Gerald Moore; Steven Novotny; Robert Fugate
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Paper Abstract

Mesospheric sodium guidestar radiance is plotted vs. wavelength, fasor power, fasor polarization and date. Peak radiance for circular polarization was about 7000 photons/sec/cm2 (V1 magnitude = 5.1) for 30 watts of pump power in November of 2005. Pumping with circular polarization at high power produces about 2 times more return than linear polarization. Pumping D2a at high power produces about 12 times more return than pumping D2b. A lidar equation is used to determine column density. Estimated maximum possible guidestar radiance is about 3 times greater than measured values. Guidestar radiance may be saturated by atoms becoming trapped in F'=1 and atomic recoil.

Paper Details

Date Published: 17 May 2006
PDF: 10 pages
Proc. SPIE 6215, Atmospheric Propagation III, 62150K (17 May 2006); doi: 10.1117/12.673121
Show Author Affiliations
John Telle, Air Force Research Lab. (United States)
Jack Drummond, Air Force Research Lab. (United States)
Craig Denman, Air Force Research Lab. (United States)
Paul Hillman, Air Force Research Lab. (United States)
Gerald Moore, Air Force Research Lab. (United States)
Steven Novotny, Air Force Research Lab. (United States)
Robert Fugate, New Mexico Institute of Mining and Technology (United States)


Published in SPIE Proceedings Vol. 6215:
Atmospheric Propagation III
Cynthia Y. Young; G. Charmaine Gilbreath, Editor(s)

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