Frequency-modulated continuous-wave light detection and ranging with sinusoidal frequency modulation and beat phase detection

被引：5
|
作者：
Tsuchida, H. [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Elect & Photon Res Inst, 1-1-4 Umezono, Tsukuba, Ibaraki 3058568, Japan
来源：
ELECTRONICS LETTERS | 2019年 / 55卷 / 24期
关键词：
FM radar; chirp modulation; optical modulation; distance measurement; semiconductor lasers; CW radar; optical radar; velocity measurement; direct frequency modulation; detection scheme; nonlinear chirp; beat phase detection; sinusoidal frequency modulation; frequency-modulated continuous-wave light detection and ranging; inherent nonlinear chirp; laser diodes; LASER;
D O I：
10.1049/el.2019.3005
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The performance of a frequency-modulated continuous-wave light detection and ranging is severely limited by the inherent non-linear chirp when laser diodes with direct frequency modulation are used as light sources. The author proposes and demonstrates a new modulation and detection scheme that is immune to non-linear chirp. Sinusoidal frequency modulation and beat phase detection are employed for measuring both the velocity and distance of a target. Relative accuracies below +/- 2 mm/s and +/- 1 mm are confirmed for velocity and distance measurements, respectively, in the proof-of-principle experiment.
引用
收藏
页码：1297 / 1298
页数：2
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