Design of readout electronic system based on single detector for wind lidar in the upper atmosphere

Rui Wang; Lian Chen; Ge Jin

doi:10.1117/12.2543476

12 March 2020 Design of readout electronic system based on single detector for wind lidar in the upper atmosphere

Rui Wang, Lian Chen, Ge Jin

Author Affiliations +

Proceedings Volume 11434, 2019 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments; 114340Q (2020) https://doi.org/10.1117/12.2543476
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

Abstract

Using a single detector to realize the detection of wind Lidar in the upper atmosphere is the simplest signal detection mode, but the disadvantage of single detector is that it would limit the dynamic range of wind Lidar. When the detection area is 30km, the linear dynamic range of electronic system is required to be 5~6 orders of magnitude. In this case, it is difficult to satisfy the demand by using analog sampling or photon counting alone. In order to extend the dynamic range of wind Lidar based on single detector, we developed a set of wind Lidar readout electronics in the upper atmosphere based on single detector which has large dynamic range. The system of the detector used analog measurement and photon counting measurement at the same time, namely, analog sampling is adopted to measure the strong echo signals and photon counting is adopted to measure the weak echo signals. At the same time, the calibration laser energy is obtained by using the integral channel to improve the accuracy of Lidar calibration. After signal acquisition, data of analog sampling channel and photon counting channel are splicing through FPGA, and finally transmitted to the upper computer through Ethernet and UART. The results of electronics test show that the linear dynamic range of readout electronics system can reach 5~6 orders of magnitude through the combination of two channel signals, which can meet the design requirements. In addition, the high integration of this electronic readout system can meet the demand of miniaturization of current wind Lidar.

Citation Download Citation

Rui Wang, Lian Chen, and Ge Jin "Design of readout electronic system based on single detector for wind lidar in the upper atmosphere", Proc. SPIE 11434, 2019 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 114340Q (12 March 2020); https://doi.org/10.1117/12.2543476

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KEYWORDS

Analog electronics

Photon counting

Data acquisition

Signal detection

LIDAR

Sensors

Atmospheric sensing

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