光学
激光线宽
激光器
连续波
光纤布拉格光栅
激光雷达
材料科学
分布式布拉格反射镜
光纤激光器
激光功率缩放
光电子学
物理
作者
Gong Zhang,Zhihuan Ding,Kuankuan Wang,Chong Jiang,Jiajun Lou,Qiaoyin Lu,Weihua Guo
出处
期刊:Optics Express
[The Optical Society]
日期:2022-01-11
卷期号:30 (2): 2599-2599
被引量:10
摘要
We demonstrated a high output power distributed-Bragg-reflector (DBR) laser integrated with semiconductor optical amplifier (SOA) for the frequency-modulated continuous-wave (FMCW) light detection and ranging (LiDAR) system. In order to acquire higher output power, different from the conventional SG-DBR laser, the front mirror in this work is a section of uniform grating to get higher transmissivity. Therefore, the output power of the laser reaches 96 mW when the gain current and SOA current are 200 mA and 400 mA, respectively. Besides, we fabricated a spot size converter (SSC) at the laser output port to enhance the fiber coupling efficiency, which reached 64% coupled into the lensed fiber whose beam waist diameter is 2.5 μm. A tuning range of 2.8 nm with free spectral range (FSR) of 0.29 nm and narrow Lorentzian linewidth of 313 kHz is achieved. To realize distance and velocity measurement, we use the iterative learning pre-distortion method to linearize the frequency sweep, which is an important part of the FMCW LiDAR technology.
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