Li Wang, Yongjie Wang, Fei Yu, Fang Li. Application of Optical Fiber Sensing Technology in the Field of Physical Ocean Observation[J]. Laser & Optoelectronics Progress, 2021, 58(13): 1306014
- Laser & Optoelectronics Progress
- Vol. 58, Issue 13, 1306014 (2021)
![Schematic of sensor structure and photos[30]. (a) Schematic of sensor structure; (b) photo of the sensor head](/richHtml/lop/2021/58/13/1306014/img_1.jpg)
Fig. 1. Schematic of sensor structure and photos[30]. (a) Schematic of sensor structure; (b) photo of the sensor head
![Warm deep chain equipment[31]. (a) Diagram of 630 m towing chain system; (b) winches and streamers; (c) warm deep chain in towing](/richHtml/lop/2021/58/13/1306014/img_2.jpg)
Fig. 2. Warm deep chain equipment[31]. (a) Diagram of 630 m towing chain system; (b) winches and streamers; (c) warm deep chain in towing
![Comparison of sea trial results in Dongsha Islands, South China Sea, July 2017[31]. (a) A towing chain; (b) traditional station observation](/Images/icon/loading.gif){kind=icon}
Fig. 3. Comparison of sea trial results in Dongsha Islands, South China Sea, July 2017[31]. (a) A towing chain; (b) traditional station observation
Fig. 4. The sea trial direction and the total depth temperature profile of the cold water mass in the north Yellow Sea in October 2017[31]
Fig. 5. Schematic of photonic crystal long period grating measurement system and its sensor structure[32]
Fig. 6. Schematic of the sensor structure at the Indian Institute of Technology[34]
Fig. 7. Principle and data of two-core optical fiber measurement[39] . (a) Schematic of TCF salinity sensor; (b) temperature dependence of salinity sensor (concentration is 1 mol/L)
Fig. 8. Spectral response of TCF salinity sensor[39]. (a) The NaCl concentration varies from 0 to 5 mol/L; (b) the NaCl concentration varies from 0 to 1 mol/L
Fig. 9. Schematic of single-ended reflective fiber interferometer[44]
Fig. 10. Sensing schematic of the F-P air cavity formed by capillary and optical fiber[45]
Fig. 11. Sensor response curves and sensitivity[46]. (a) Response of microcavity sensors; (b) pressure sensitivity of different microcavity sensors
Fig. 12. Fiber cross-section structure[48]. (a) Optical fibre cross-section; (b) local enlarged view of optical fibre cross-section; (c) SEM photo hole part of TC-PCF
Fig. 13. The spectrum shift of the sensor with the hydrostatic pressure changes from 0 MPa to 45 MPa[48]
Fig. 14. Fiber-optic Fabry-Perot high pressure sensor core structure[49]
Fig. 15. Relationship curves between sensitivity and fiber diameter[51]
Fig. 16. Schematic of HBEF sensor based on Sagnac loop[52]
Fig. 17. Simulated spectra when L is 5.5 cm (red), 7.8 cm (blue), 29.9 cm (green), and 98.9 cm (black) [52]
Fig. 18. OMC sensor experiment process[53]. (a) Schematic of experimental apparatus for measuring salinity, temperature, and depth of sea water; (b) optical microscope images of the experimental apparatus for salinity measurement and OMC samples; (c) experimental apparatus for temperature measurement; (d) experimental apparatus for depth measurement
Fig. 19. Research area[59]
Fig. 20. Turbulence mediating effects of aggregation and dissociation rates in the upper ocean[61]
Fig. 21. Structure of sensor head[65]. (a) Schematic of sensor probe structure; (b) description of working principle
Fig. 22. Experimental data of a fast-changing temperature turbulent heat dissipation sensor[65]. (a) Place an ice pack on the surface of the water; (b) measure turbulence by pouring some hot water into a bucket of cold water, and the response of a commercial high speed thermistor FP07 is provided for calibration and reference
Fig. 23. Sensor package structure[66]
Fig. 24. Comparison diagram of correlation between PNS signal and FBG signal[66]
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Table 1. Summary of advantages and disadvantages of fiber optic temperature, salinity, depth, and flow sensor
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