Upgraded raman lidar with ultraspectral resolution

Upgraded Raman Lidar with spectral resolution of dλ/λ≤10 have been design and elaborated for the aerosearch of leaks on the main gas pipelines. The sensing is carried out by 7ns pulses of DPSS laser with energy of 10 mJ at 300Hz frequency and wavelength of 261.7 nm. Polycromator have been implemented on base of the concave grating (N=1200 mm) and operates in 4th diffraction order. Lidar measures the leaks of CH4 with concentration of 2 ppm and above. Scanning in angles of ±30о and at frequency of 20 Hz allows to carry out measurements on inclined courses.