Abstract

When compared to the 720-nm and 820-nm water vapor absorption band, the use of the stronger absorption lines (x 20) in the 940-nm wavelength range can significantly improve differential absorption lidar measurements of the low concentrations of H₂O in the upper troposphere and lower stratosphere. Finding a simple and efficient way to generate laser light at 940 nm is therefore a pressing need for NASA atmospheric science program. The directors discretionary fund (DDF) program at NASA Langley Research Center provides a mean to evaluate high risk novel technologies that hold potential for a high payoff. Using this resource, we have started the characterization of a new technique that will be used to develop a 940-nm water vapor lidar transmitter.

© 1997 Optical Society of America