IR Lidar based on OPO

V. S. Ayrapetyan; A. V. Hakobyan; G. M. Apresyan; E. M. Poghossyan; A. H. Sahakyan; K. A. Sargsyan; T. K. Sargsyan

doi:10.1117/12.675897

21 April 2006 IR Lidar based on OPO

V. S. Ayrapetyan, A. V. Hakobyan, G. M. Apresyan, E. M. Poghossyan, A. H. Sahakyan, K. A. Sargsyan, T. K. Sargsyan

Proceedings Volume 6160, Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics; 61602N (2006) https://doi.org/10.1117/12.675897
Event: Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 2005, Tomsk, Russian Federation

Abstract

Automated differential lidar set for measurement of atmospheric gases small concentration is developed, created and tested on the bases of Optical Parametric Oscillator (OPO), tunable in middle infrared (IR) range. Measurable sensitivity accuracy obtained for atmospheric methane is not less than I ppm. Being smoothly tunable in the wavelength range of 1.4 ÷ 4.2um with the spectral bandwidth of 3cm^-1 (for 1.4÷1 .8um and 2.9÷4.2um) and pulse energy up to 40mJ, the OPO irradiation allows measurement of gas concentrations in an open atmosphere up to 5km. If required computer controlled Fabry-Perot etalon (FPE) insertion into the resonator is provided to narrow the bandwidth up to O.6cm^-1 . Construction of the OPO allows also radiation wavelength stepwise change (pulse to pulse) with a smooth regulation from 0 to 12cm^-1 that is necessary to carry out gas concentration measurement by the method of differential absorption with one laser. Lidar set is equipped with a self-regulated system, tuned at the absorption line of the gas under investigation that is initially installed into the system.

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V. S. Ayrapetyan, A. V. Hakobyan, G. M. Apresyan, E. M. Poghossyan, A. H. Sahakyan, K. A. Sargsyan, and T. K. Sargsyan "IR Lidar based on OPO", Proc. SPIE 6160, Twelfth Joint International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 61602N (21 April 2006); https://doi.org/10.1117/12.675897

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