Shuyao Zong, Xiaoyan Wen, Dongsheng Zhang. Mach-Zehnder Interferometer Based on Fiber Core Mismatch and Core-Offset Splicing for the Simultaneous Sensing of Temperature and Refractive Index[J]. Laser & Optoelectronics Progress, 2020, 57(17): 170607
- Laser & Optoelectronics Progress
- Vol. 57, Issue 17, 170607 (2020)
Fig. 1. Schematic diagram of the sensing structure
Fig. 2. Schematic diagram of the measuring system
Fig. 3. Transmission spectra from the MZI without and with tapered structure
Fig. 4. Spatial frequency spectrum of the sensor in air
Fig. 5. Refractive index sensing characteristics. (a) Measured transmission spectra with different RI; (b) measured wavelength shift of the transmission dip 2 versus RI
Fig. 6. Temperature sensing characteristics. (a) Measured transmission spectra with different temperature; (b) measured wavelength shift of the transmission dips versus temperature
Fig. 7. Experimental results of simultaneous measurement of temperature and refractive index. (a) Transmission spectrum; (b) experimental result
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Table 1. Normalized optical power of the sensing SMFs with different d in core region and l
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Table 2. Normalized optical power of the sensing SMFs with different l in core region and d
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Table 3. Calculated neff of different order modes
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