A pure rotational Raman-lidar based on three-stage Fabry-Perot etalons for monitoring atmospheric temperature

作者: Wang Shaolin , Su Jia , Zhao Peitao , Cao Kai-Fa , Hu Shun-Xing

DOI: 10.7498/APS.57.3941

关键词: Spectral lineLidarOpticsTemperature measurementRaman scatteringRaman spectroscopyChemistryMonochromatorLaserFabry–Pérot interferometer

摘要: A new pure rotational Raman-lidar system for monitoring atmospheric temperature is presented. Instead of using the double grating monochromator, employs two high resolution spectral resolving channels,each which composed a three-stage Fabry-Perot etalon combined with filter band width 7nm. The transmitting light source an injection-seeded Nd:YAG laser. This configuration can achieve rejection rate (10 -10 ) to Mie-Rayleigh elastic scattering (at 532nm wavelength),and has extremely narrow receiving bandwidth (less than 10pm) rotation Raman N 2 quantum numbers ±6 and ±12 respectively. Therefore, effectively rejects interference background radiation O , measurement daytime tropospheric from single line intensity ratio lidar made possible because bandwidth. precision this improved at same time. At last, two_channels signals were simulated by balloon-based sounding profile. simulation demonstrated feasibility profile measurement.

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