Laser & Optoelectronics Progress, Volume. 58, Issue 13, 1306015(2021)
Development of Seawater Temperature , Salinity and Pressure Sensing Based on Interferometric Microfiber Device
Fig. 1. Poynting vector of the HE11 mode of the microfiber in seawater. (a) Diameter is 400 nm; (b) diameter is 1000 nm[43]
Fig. 2. Structure of the microfiber. (a) Structure and parameters of the SiO₂ microfiber; (b) refractive index profile; (c) variation curve of effective refractive index with fiber diameter[51]
Fig. 4. Seawater temperature sensor based on MRR. (a) Microfiber Loop type ring resonator[69]; (b) variation curve of the refractive index sensitivity of the MRR with the fiber diameter[69]; (c) spectrum of the MRR under the peak shift sensing mechanism[70]; (d) spectrum of the MRR under the intensity sensing mechanism[72]; (e) schematic diagram of the two-point seawater temperature measurement system[73]; (f) variation curve of the resonance wavelength with the seawater temperaturee[73]
Fig. 5. Seawater salinity sensor based on MRR. (a) Experimental spectrum under the peak shift mechanism[75]; (b) normalized transmission spectrum when elliptically polarized light is input[76]; (c) variation curve of temperature sensitivity with the diameter of microfiber ring[77]; (d) microfiber dual-arm MZI with resonator cavity[78]; (e) transmission spectra under different salinities[78]
Fig. 6. Experimental results of the MDC. (a) Schematic diagram of seawater temperature and salinity sensor[82]; (b) experimental device of seawater temperature and salinity sensor[83]; (c) transmission spectra of the coupler under different salinities[83]; (d) transmission spectra of the coupler at different temperatures[83]; (e) experimental device for seawater temperature, salinity and pressure sensor[84]
Fig. 8. Structure of the MMZI dual-parameter sensor. (a) Structure of the sensor[87]; (b) typical transmission spectrum of the sensor[87]; (c) transmission spectrum after high frequency filtering[87]; (d) pressure distribution of the sensor when the pressure is 1 MPa[88]; (e) transmission spectra under different pressures[88]; (f) variation curve of interference peak wavelength with temperature[88]
Fig. 10. Environmental adaptability of the microfiber sensor. (a) Long-term performance test results; (b) effect of vibration on the transmission spectrum; (c) effect of 30 Hz vibration on single-wavelength light intensity; (d) sea trial photos of disposable probes equipped with MMZI [89]
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Shanshan Wang, Yuxuan Xiao, Jing Wang, Yipeng Liao, Juncheng Zhang. Development of Seawater Temperature , Salinity and Pressure Sensing Based on Interferometric Microfiber Device[J]. Laser & Optoelectronics Progress, 2021, 58(13): 1306015
Category: Fiber Optics and Optical Communications
Received: Dec. 25, 2020
Accepted: Jan. 14, 2021
Published Online: Jul. 5, 2021
The Author Email: Wang Jing (wjing@ouc.edu.cn), Zhang Juncheng (zhangjuncheng@ouc.edu.cn)