Narrow Linewidth External Cavity Laser Capable of High Repetition Frequency Tuning for FMCW LiDAR

被引：30
作者：
Wu, Ying [1 ]
Deng, Lihua [1 ]
Yang, Kunyun [2 ,3 ]
Liang, Wei [1 ]
机构：
[1] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion SINANO, Suzhou 215123, Peoples R China
[2] Gusu Lab Mat, Suzhou 215123, Peoples R China
[3] Suzhou Leizhi Sensing Technol LLC, Suzhou 215123, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2022年 / 34卷 / 21期
基金：
中国国家自然科学基金;
关键词：
Frequency modulation; Laser tuning; Delays; Fiber lasers; Distance measurement; Spatial resolution; Optical fiber sensors; FMCW; LiDAR; external cavity laser; narrow linewidth; DOMAIN REFLECTOMETRY; SEMICONDUCTOR-LASER; SWEEP; RESOLUTION;
D O I：
10.1109/LPT.2022.3203063
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：
A light source with well-rounded performance including the narrow linewidth, wide frequency tuning range, high repetition rate and good linearity, is highly sought-after for frequency-modulated continuous-wave (FMCW) light detection and ranging (LiDAR). In this work, we report a directly frequency modulated external cavity laser with the linewidth of 5.06 kHz. The frequency tuning range of 1.1 GHz, 445.5 MHz, 228.9 MHz are demonstrated at the repetition rate of 1 kHz, 10 kHz and 100 kHz, respectively. The frequency sweep linearization is achieved by iterative learning pre-distortion. The ranging performance with the repetition rate up to 100 kHz is investigated. The signal-to-noise ratio is still higher than 35 dB while the length of delay fiber is 156 m, corresponding to a target 110 m away in free space. These results indicate that the proposed swept-frequency laser has great potential for autonomous driving applications.
引用
收藏
页码：1123 / 1126
页数：4
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