Yuanze Xue, Xuefeng Wang, Caijie Tang, Hongchun Gao. Cross-Correlation Algorithm of Optical Frequency Domain Reflectometry Sensing System Based on Adapted Range[J]. Acta Optica Sinica, 2021, 41(13): 1306020
- Acta Optica Sinica
- Vol. 41, Issue 13, 1306020 (2021)
Fig. 1. OFDR distributed optical fiber temperature/strain measurement system
Fig. 2. Spectral drift diagram
Fig. 3. Schematic illustration of cross-correlation algorithm based on adapted range
Fig. 4. Cross-correlation results of 500 ℃ temperature sensing. (a) Common correlation; (b) correlation based on adapted range
Fig. 5. Demodulation time of common correlation algorithm and cross-correlation algorithm based on adapted range
Fig. 6. Temperature experiment device
Fig. 7. Results of temperature testing. (a) Wavelength offset change with fiber length at different temperatures; (b) temperature-wavelength fitting
Fig. 8. Strain experiment device
Fig. 9. Strain testing curves
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Table 1. Results of temperature test
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Table 2. Results of strain testunit: με
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Table 3. Comparison of measurement range and demodulation time realized by different demodulation algorithms
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