[OPTICAL REVIEW Vol. 6, No. 2 (1999) 160-162]

Linearity Requirement for a Linear Frequency Modulation Lidar

Lijie QIAO, Dongsong SUN, Xiaofu ZHANG and Yuan ZHAO

Department of Applied Physics, Harbin Institute of Technology, Harbin 150001, P.R.China

(Received November 13, 1997; Revised November 20, 1998; Accepted December 25, 1998)

The nonlinear of the frequency modulation in linear frequency modulation (LFM) lidar seriously affects the accuracy of range and velocity. We describe the influence of nonlinear of the frequency modulation on the accuracy. The frequency-domain analysis of heterodyne signal is used to deduce the linearity requirement for LFM lidar.

Key words : lidar, chirp lidar, homodyne detection