Airborne Doppler lidar at 532nm based on a tunable dual-channel Fabry-Perot interferometer

Jian-mei Feng; Ting-wen Xing; Wi-mei Lin

doi:10.1117/12.835945

28 August 2009 Airborne Doppler lidar at 532nm based on a tunable dual-channel Fabry-Perot interferometer

Jian-mei Feng, Ting-wen Xing, Wi-mei Lin

Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 73821R (2009) https://doi.org/10.1117/12.835945
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

The aim of this paper is to explore a high-precision, a wide range of a frequency discrimination technique, and to study the application of this technique in the optical air data system (MOADS). To overcome the traditional equipment's shortcomings of short velocity detecting range such as pilot static tubes and wind wane, this technique can provide precision aviation data for various aerocrafts , without influencing pneumatic shape and performance of aerocraft. A tunable dual channel Fabry-Perot interferometer is used as a frequency discriminator in an airborne wind lidar system. This new frequency discriminator has been proposed to overcome the exiting frequency discriminator shortcoming. By adjusting the cavity length of interferometer, the speed of aerocraft can be detected and cut into several dynamic range. By this way, the Doppler wind lidar system can detect atmospheric parameters at the meantime, such as speed of aerocraft and temperature of atmosphere around the aerocraft, by analyzing the information of Rayleigh backscattering light. There are three main contribution in this paper: the first is discussing the basic theory of MOADS, calculational method and mathematic model of relative wind velocity between aircraft and wind are put forward.; the second is the parameter optimization of the dual-channel Fabry-Perot interferometer and the structure design of the interferometer; the third is the simulation of the performance and the accuracy of this system. Theory analysis and simulation results show this method is reasonable and practical.

Citation Download Citation

Jian-mei Feng, Ting-wen Xing, and Wi-mei Lin "Airborne Doppler lidar at 532nm based on a tunable dual-channel Fabry-Perot interferometer", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73821R (28 August 2009); https://doi.org/10.1117/12.835945

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KEYWORDS

Doppler effect

LIDAR

Fabry–Perot interferometry

Backscatter

Interferometers

Atmospheric sensing

Sensors

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