Journal of Applied Optics, Volume. 46, Issue 4, 739(2025)
Multi-interference optical circuit ranging system based on FMCW laser radar
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Fig. 1. Frequency-modulated continuous wave multi-interference optical circuit system
Fig. 3. Principle of multi-compensation optical fiber circuit measurement
Fig. 4. Normalized signal spectrum-amplitude diagram of different window functions
Fig. 5. Time-frequency simulation results of two optical path structures (detection range: 30 m)
Fig. 7. Distance-frequency spectrum of two optical path structures (detection range: 0~30 m)
Fig. 8. Ranging stability of system at different detection distances
Fig. 9. Ranging resolution of system at different detection distances
Table 1. Simulation parameters
View tableView in ArticleTable 1. Simulation parameters
参数 值 采样频率 /MHz 25 采样点数 12 500 激光功率 /mW 40 激光波长 /nm 1 550 调制带宽 /nm 0.9 调制频率 /kHz 2 探测距离 /m 30
Table 2. Parameters setting of experimental device
View tableView in ArticleTable 2. Parameters setting of experimental device
实验器件 参数 值 光纤激光器 波长 /nm 1 550 激光功率 /mW 40～60 调制带宽 /nm 0.9 光纤分束器 分数比 1∶99 光纤耦合器 分数比 50∶50 光纤环形器 隔离度/dB 40 探测器 带宽 /MHz 10 平凸透镜 焦距 /cm 10
Table 3. Parameters setting
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Yujiao QI, Yue PENG, Haiyang ZHANG, Bida SU, Bowen ZHANG, Fahong JIN. Multi-interference optical circuit ranging system based on FMCW laser radar[J]. Journal of Applied Optics, 2025, 46(4): 739
Paper Information
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Received: Dec. 3, 2024
Accepted: --
Published Online: Sep. 16, 2025
The Author Email: Yujiao QI (1548752512@qq.com)
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