Abstract
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.
Highlights
Temperature is a key parameter in the atmosphere and plays a major role in many atmospheric processes
The sampling of the entire Rayleigh Brillouin scattering (RBS) line shape required 28 min, and the results show temperature profiles from 2 km to 15.3 km [9]
The finesse of Fizeau Interferometer is determined by the ratio of Free spectrum range (FSR) and the FWHM shown from different fibers, and is correlated with the fiber mode
Summary
Temperature is a key parameter in the atmosphere and plays a major role in many atmospheric processes. A fiber coupler (Fig. 1, FC) is used to couple the backscattered light and direct it to the Fizeau interferometer.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
