Characterization of a Novel Temperature Lidar Receiver by Means of Laboratory Rayleigh-Brillouin Scattering Measurements
1 German Aerospace Center (DLR), Institute of Atmospheric Physics, 82234 Oberpfaffenhofen, Germany
2 School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
3 Department of Physics and Astronomy, LaserLaB, VU University, 1081 HV Amsterdam, Netherlands
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Published online: 7 July 2020
A new receiver setup based on an imaging Fizeau interferometer measuring the Rayleigh Brillouin scattering (RBS) spectra to retrieve tropospheric temperature profiles is introduced. The optical layout of the proposed receiver design is discussed and its functionality is demonstrated by means of accurate and controlled laboratory RBS measurements. The proposed temperature receiver is based on a Fizeau interferometer and a 32 channel PMT array which can resolve the RBS spectrum without applying any scanning procedures. In order to avoid any incidence angle fluctuations on the Fizeau interferometer caused by for instance atmospheric turbulence, the application of a fiver coupled telescope was investigated. It is shown that a 50 µm fiber (NA=0.12) provides both, sufficient coupling efficiency and sufficiently low divergence in order to keep the Finesse of the interferometer. The performance of the novel lidar receiver is verified by means of accurate laboratory RBS measurements.
© The Authors, published by EDP Sciences, 2020
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