Backscattered signal modulation and emitting module design for a cloud lidar

Xiaowen Shu; Zhenyi Chen; Xu Lian; Hui Jin; Xiaofu Zhang

doi:10.1117/12.2057303

21 February 2014 Backscattered signal modulation and emitting module design for a cloud lidar

Xiaowen Shu, Zhenyi Chen, Xu Lian, Hui Jin, Xiaofu Zhang

Proceedings Volume 9142, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics: Optical Imaging, Remote Sensing, and Laser-Matter Interaction 2013; 91422F (2014) https://doi.org/10.1117/12.2057303
Event: Selected Proceedings of the Photoelectronic Technology Committee Conferences held July-December 2013, 2013, SuZhou, China

Abstract

The cloud lidar, with the character of high precision and good stability, is an effective way to detect the cloud height. Pulse diode laser (PLD), as an essential part of the lidar system, needs the triggering pulse. In this paper, the emitting part of the lidar is studied，including the simulation of the backscatter SNR, the choose of the PLD and the design of trigging circuit to drive the 905nm PLD with the consideration of the optical system. A circuit for trigging the laser pulse with adjustable power and pulse width is contrived. Then the software Systemview is used to emulate the design and finally the making of PCB is finished. The results show whatever the parameters of the pulse, namely trigging pulse width, the rising edge, dithering , all these can be qualified to be in use in the practice and enjoys the merits of the low cost and convenience. The emitting module operates well.

Citation Download Citation

Xiaowen Shu, Zhenyi Chen, Xu Lian, Hui Jin, and Xiaofu Zhang "Backscattered signal modulation and emitting module design for a cloud lidar", Proc. SPIE 9142, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics: Optical Imaging, Remote Sensing, and Laser-Matter Interaction 2013, 91422F (21 February 2014); https://doi.org/10.1117/12.2057303

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KEYWORDS

Clouds

LIDAR

Signal to noise ratio

Semiconductor lasers

Pulsed laser operation

Clocks

Backscatter

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