title: Heterodyne Doppler velocity measurement of moving targets by mode-locked pulse laser.
abstract: In this study, heterodyne detection is adopted to measure the velocity of a target simulated by a rapidly rotating plate by using a mode-locked pulse laser as the resource. The coherent beat frequency of the signal light reflected by target and local oscillation light occurred on the surface of the detector. Then the waveform of beat frequency was processed by filtering to obtain the Doppler frequency shift of the signal light induced by target. With this frequency shift, the velocity of target could be obtained by calculation. Results indicate that the measurement has a high precision. The error on average is within 0.4 m/s.
authors.affiliation: National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Bai
authors.forename: Deming
authors.initials: D
authors.lastname: Ren
authors.forename: Weijiang
authors.initials: W
authors.lastname: Zhao
authors.forename: Yanchen
authors.initials: Y
authors.lastname: Qu
authors.forename: Liming
authors.initials: L
authors.lastname: Qian
authors.forename: Zhenlei
authors.initials: Z
authors.lastname: Chen
mesh_terms: D004301:Doppler Effect; D004867:Equipment Design; D007834:Lasers; D008962:Models, Theoretical; D011825:Radar / Q000295:instrumentation*; D058998:Remote Sensing Technology / Q000295:instrumentation / Q000379:methods*; D012399:Rotation; D014054:Tomography / Q000295:instrumentation / Q000379:methods*