An optical splitting system is introduced that can be employed for water vapor ultraviolet Raman lidar.It contains a combination of four prisms which are made of fused silica,and can be used to split multi-wavelength backscattering singals of lidar.For 266 nm excitation wavelength,lidar Raman backscattering wavelengths intervals of O2,N2,and H2O are small,and common filters are difficult to split them enough.This optical splitting system can split these Raman backscattering signals by optimizing the system ...