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Proceedings Paper

Coherent emission sources tunable in a wide range for a CH4 lidar
Author(s): Yuri M. Andreev; Pavel P. Geiko; Mihail V. Alampiev; Efim M. Shvom; Mikhail Yu. Kataev
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Paper Abstract

In this paper we present results obtained at the first stage of development of Small Mobile DAS Lidar to control leakage of methane and methane-bearing gas mixtures. We developed three models that operate at 0.25; 12.5, and 200 Hz pulse repetition frequency. All three are small Optical Parametric Oscillators (OPO) based on KTP crystals pumped with Nd:YAG (1.064 micrometers ) or Nd:YA (1.079 micrometers ) lasers. They span the 1.52 to 1.58 and 3.2 to 3.5 micrometers ranges and allow to work on both the most intense and weak CH4 absorption bands with the center at (lambda) equals 1.57 micrometers having the emission line width of 1 and 2.5 nm, respectively. The energies of single 5-ns emission pulses are equal to 4-5, 8- 10 and 15 mJ, respectively. It is enough for sensing up to 1 to 3-km distances with the sensitivity of 50 ppb/km. Second Harmonic Generation of OPO emission allows one to make measurements within 1.66 and 0.77 micrometers CH4 absorption bands.

Paper Details

Date Published: 19 November 1999
PDF: 8 pages
Proc. SPIE 3983, Sixth International Symposium on Atmospheric and Ocean Optics, (19 November 1999); doi: 10.1117/12.370529
Show Author Affiliations
Yuri M. Andreev, Institute of Optical Monitoring (Russia)
Pavel P. Geiko, Institute of Optical Monitoring (Russia)
Mihail V. Alampiev, IT-Lagran Co., Ltd. (Russia)
Efim M. Shvom, IT-Lagran Co., Ltd. (Russia)
Mikhail Yu. Kataev, Tomsk Univ. of Control Systems and Radioelectronics (Russia)

Published in SPIE Proceedings Vol. 3983:
Sixth International Symposium on Atmospheric and Ocean Optics
Gennadii G. Matvienko; Vladimir P. Lukin, Editor(s)

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