Non-intrusive flow measurement based on a distributed feedback fiber laser 
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1 School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
2 Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
3 School of Electrical Engineering & Telecommunications, University of New South Wales, NSW 2052, Australia
Figures & Tables
Fig. 1. Structural diagram of the flow sensor based on the DFB-FL.
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Fig. 2. System diagram of flow measurement based on the DFB-FL.
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Fig. 3. Frequency response curve of the flow sensor.
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Fig. 4. Linear response curve of the flow sensor.
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Fig. 5. Flow experiment setup: (a) physical device diagram, (b) structural schematic diagram.
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Fig. 6. Time domain demodulation signal with different flows.
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Fig. 7. Frequency domain demodulation signal with different flows.
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Fig. 8. Relation curves between flow and energy.
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Table1. Experimental Data of Flow Measurement
| Amplitude (rad) | Flow (m3/h) | Flow rate (m/s) |
|---|
| 0.03388 | 0.6 | 0.046 | | 0.03566 | 1.1 | 0.084 | | 0.03737 | 3.4 | 0.260 | | 0.03880 | 4.6 | 0.352 | | 0.03956 | 5.4 | 0.398 | | 0.04204 | 11.3 | 0.864 | | 0.04353 | 18.4 | 1.407 | | 0.04534 | 25.5 | 1.950 |
|
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Jiasheng Ni, Ying Shang, Chen Wang, Wenan Zhao, Chang Li, Bing Cao, Sheng Huang, Chang Wang, Gangding Peng. Non-intrusive flow measurement based on a distributed feedback fiber laser[J]. Chinese Optics Letters, 2020, 18(2): 021204.
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