Dual-Frequency Doppler LiDAR Based on External Optical Feedback Effect in a Laser

Zhuqiu Chen; Yanguang Yu; Yuxi Ruan; Bairun Nie; Jiangtao Xi; Qinghua Guo; Jun Tong

doi:10.3390/s20216303

Dual-Frequency Doppler LiDAR Based on External Optical Feedback Effect in a Laser

Sensors (Basel). 2020 Nov 5;20(21):6303. doi: 10.3390/s20216303.

Authors

Zhuqiu Chen¹, Yanguang Yu¹, Yuxi Ruan¹, Bairun Nie¹, Jiangtao Xi¹, Qinghua Guo¹, Jun Tong¹

Affiliation

¹ School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong 2522, NSW, Australia.

Abstract

A novel Dual-frequency Doppler LiDAR (DFDL) is presented where the dual-frequency light source is generated by using external optical feedback (EOF) effect in a laser diode (LD). By operating a LD at period-one (P1) state and choosing suitable LD related parameters, a dual-frequency light source can be achieved. Such a dual-frequency source has advantages of the minimum part-count scheme, low cost in implementation, and ease in optical alignment. Theory and system design are presented for the proposed DFDL for velocity measurement with high measurement resolution. The proposed design has a potential contribution to the Light Detection And Ranging (LiDAR) in practical engineering applications.

Keywords: doppler LiDAR; dual-frequency laser; laser dynamics; optical feedback; velocity measurement.

Publication types

Letter