Ultra-linear FMCW laser based on time-frequency self-injection locking  

作　　者：JICHEN ZHANG SHANGYUAN LI XIAOPING ZHENG XIAOXIAO XUE 

机构地区：[1]Department of Electronic Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Photonics Research》2025年第1期31-39,共9页光子学研究(英文版)

基　　金：National Key Research and Development Program of China(2021YFB2800602);National Natural Science Foundation of China(62127805);Fundamental Research Funds for the Central Universities(2242022k60006);Open Research Fund of Key Laboratory of All Optical Network and Advanced Telecommunication Network,Ministry of Education,Beijing Jiaotong University(AON2024K02).

摘　　要：Frequency-modulated continuous-wave(FMCW)light sources are essential components for coherent light detection and ranging(LiDAR),which is ubiquitously utilized in autonomous driving,industrial monitoring,and geological remote sensing.Traditional FMCW LiDAR systems often face challenges in achieving high frequencysweep linearity and large excursion,which are critical for accurate distance and velocity measurements.Here,we propose a self-injection locked laser with frequency-shifted feedback to generate ultra-linear and wideband FMCW light.A record-low relative frequency nonlinearity of 6.4×10^(-7)is achieved when the frequency excursion is 100 GHz and the repetition frequency is 1 kHz.In the LiDAR test,a range resolution of 1.6 mm and a velocity accuracy of 3 mm/s at 300 m distance are demonstrated,and those of 8.1 mm and 6 mm/s at 1 km distance are also obtained.The reported FMCW light source provides not only enhanced performance in coherent LiDAR,but also utilization potential in various high-precision measurement scenarios.

关 键 词：laser LIDAR INJECTION 

分 类 号：TN248[电子电信—物理电子学]