Acta Optica Sinica, Volume. 31, Issue 6, 606002(2011)
Homodyne Detection of Distance and Velocity by Chirped-Amplitude Modulated Lidar
A system of coherent ladar which is based on chirp amplitude modulation is built. The system is made up of narrow-line-width laser, Mach-Zehnder intensity modulator, and fiber homodyne detection optics. The measurement of velocity and distance of the target is completed based on chirp signal generated by direct digital synthesis(DDS), both the resolution and error of velocity and range are measured and analyzed, and research on relation between signal-to-noise ratio (SNR) and system detection power is also completed. Experimental data indicates that velocity accuracy reaches mm/s, range accuracy reaches cm and sensitivity is better than 0.1 nW.
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Yu Xiao, Hong Guanglie, Ling Yuan, Shu Rong. Homodyne Detection of Distance and Velocity by Chirped-Amplitude Modulated Lidar[J]. Acta Optica Sinica, 2011, 31(6): 606002
Category: Fiber Optics and Optical Communications
Received: Nov. 15, 2010
Accepted: --
Published Online: May. 18, 2011
The Author Email: Xiao Yu (1986.yu.xiao@gmail.com)