Studies by a Mesospheric Sodium Guidestar Pumped by Continuous Wave Sum-Frequency Mixing of Two Nd: YAG Laser in Lithium Triborate (Preprint)
Abstract
Mesospberic sodium guidestar radiance is plotted vs. wavelength, fasor power, fasor polarization and date Peak radiance for circular polarization was about 7000 photons/sec/sq cm (Vl 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. Patimated 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 16, 2006
- Accession Number
- ADA458339
Entities
People
- John Telle
Organizations
- Air Force Research Laboratory