Remote analysis of methane content in the atmosphere by an IR DIAL lidar system in the 3300-3430-nm spectral range
O.A. Romanovskii, S.A. Sadovnikov, O.V. Kharchenko, S.V. Yakovlev
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: лидар, инфракрасный диапазон, параметрическая генерация света, дифференциальное поглощение, метан, lidar, infrared region, optical parametric oscillator, differential absorption, methane
Abstract
A differential absorption lidar (DIAL) system based on optical parametric oscillators (OPO) with nonlinear KTA and KTP crystals is designed. The crystals allow laser radiation tuning in the IR wavelength region. A series of experiments on remote monitoring of methane along a horizontal surface sounding path in the 3300-3430-nm spectral range was carried out. Based on the experimental results, the CH4 concentrations along the 800 m surface path are retrieved in the spectral range under study with a spatial resolution of 100 m.
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