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Article

Distance and Velocity Measurement of Coherent Lidar Based on Chirp Pulse Compression

by
Jing Yang
1,2,
Bin Zhao
2 and
Bo Liu
2,*
1
University of Chinese Academy of Sciences, Beijing 100049, China
2
Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(10), 2313; https://doi.org/10.3390/s19102313
Submission received: 11 March 2019 / Revised: 25 April 2019 / Accepted: 13 May 2019 / Published: 20 May 2019
(This article belongs to the Section Remote Sensors)
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Abstract

To explore lidar, which can simultaneously measure the distance and velocity of long-distance targets at high resolution, a coherent lidar system based on chirp pulse compression has been studied. Instead of a conventional acousto-optic modulator (AOM), we used an electro-optic modulator (EOM) to modulate a continuous 1550 nm laser. Using EOM, the resolution of the lidar is higher and the system simpler. The electrical waveform used to modulate the laser is a chirp pulse, which has a sweeping bandwidth of 98 MHz, a duration of 10 µs, and a pulse repetition rate of 20 kHz. The result of 100 measurements shows that the system may yield accurate information in range, ±22 cm, and radial velocity, ±1.066 cm/s.
Keywords: lidar; coherent; distance; velocity; pulse compression lidar; coherent; distance; velocity; pulse compression

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MDPI and ACS Style

Yang, J.; Zhao, B.; Liu, B. Distance and Velocity Measurement of Coherent Lidar Based on Chirp Pulse Compression. Sensors 2019, 19, 2313. https://doi.org/10.3390/s19102313

AMA Style

Yang J, Zhao B, Liu B. Distance and Velocity Measurement of Coherent Lidar Based on Chirp Pulse Compression. Sensors. 2019; 19(10):2313. https://doi.org/10.3390/s19102313

Chicago/Turabian Style

Yang, Jing, Bin Zhao, and Bo Liu. 2019. "Distance and Velocity Measurement of Coherent Lidar Based on Chirp Pulse Compression" Sensors 19, no. 10: 2313. https://doi.org/10.3390/s19102313

APA Style

Yang, J., Zhao, B., & Liu, B. (2019). Distance and Velocity Measurement of Coherent Lidar Based on Chirp Pulse Compression. Sensors, 19(10), 2313. https://doi.org/10.3390/s19102313

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