Luming Song, Fumin Zhang, Dong Sun, Hongyi Lin, Xiaohua Huang, Miao Yu, Qian Zhang. Research progress of absolute distance measurement methods based on tunable laser frequency sweeping interference[J]. Infrared and Laser Engineering, 2022, 51(5): 20210406
- Infrared and Laser Engineering
- Vol. 51, Issue 5, 20210406 (2022)
Fig. 1. Schematic of laser ranging of frequency sweeping interferometer
Fig. 2. Schematic diagram of calculating the interference signal phase difference. (a) Ideal linear frequency sweeping; (b) Actual nonlinear frequency sweeping
![Frequency sweeping system based on PLL control[29]](/Images/icon/loading.gif){kind=icon}
Fig. 3. Frequency sweeping system based on PLL control[29]
Fig. 4. VCSEL frequency sweeping ranging system based on PLL control[33]
Fig. 5. Nonlinear frequency sweeping compensation system based on Hilbert transform[37]
Fig. 6. Resampling frequency sweeping interferometry ranging based on hardware[40]
Fig. 7. Compensation of non-linear frequency sweeping based on F-P cavity and M-Z interferometer[44]
Fig. 8. Dual laser-based counter frequency sweeping ranging[50]
Fig. 9. Frequency sweeping ranging system based on double swept and gas chamber calibration[60]
Fig. 10. Double swept interferometric ranging based on four wave mixing[63]
Fig. 11. Frequency sweeping ranging system based on Doppler velocimeter[66]
Fig. 12. FSI system for suppressing Doppler amplification dynamic error[77]
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Table 1. Comparison of ranging accuracy of active frequency stabilized FSI system
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Table 2. Comparison of ranging accuracy of passive compensation FSI system
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Table 3. Comparison of FSI system ranging accuracy for compensating vibration drift
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Table 4. Comparison of FSI system ranging accuracy for compensating dispersion mismatch
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