Remote sensing of H2O at 0.94 um

Norman P. Barnes; Brian M. Walsh

doi:10.1117/12.319567

19 August 1998 Remote sensing of H₂O at 0.94 μm

Norman P. Barnes, Brian M. Walsh

Proceedings Volume 3504, Optical Remote Sensing for Industry and Environmental Monitoring; (1998) https://doi.org/10.1117/12.319567
Event: Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 1998, Beijing, China

Abstract

An H₂O vapor remote sensing instrument which could operate in the 0.94 micrometer region would have several highly desirable characteristics. Among the characteristics are access to absorption lines with approximately the correct strength and the availability of good detection systems. A good candidate for the laser for such a system is a Nd:garnet laser operating on one of the ⁴F_3/2 to ⁴I_9/2 transitions. To make such a system a reality, NASA Langley has investigated compositional tuning to develop a laser at precisely the correct wavelength and methods of improving the efficiency. Both efforts have achieved success. A flashlamp pumped Nd:YAG laser operating at room temperature on the 0.946 micrometer transition has achieved a threshold of 12 J and a slope efficiency of 0.009.

Citation Download Citation

Norman P. Barnes and Brian M. Walsh "Remote sensing of H₂O at 0.94 μm", Proc. SPIE 3504, Optical Remote Sensing for Industry and Environmental Monitoring, (19 August 1998); https://doi.org/10.1117/12.319567

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