Qiang Liu, Weihong Bi, Siwen Wang, Xin Lü, Xinghu Fu, Guangwei Fu. Few-Mode Fiber Temperature Sensor Based on Interference Between LP01 and LP11 Modes[J]. Acta Optica Sinica, 2018, 38(2): 0206001
- Acta Optica Sinica
- Vol. 38, Issue 2, 0206001 (2018)
Fig. 1. Refractive index profile of the FMF
Fig. 2. Function chart of f(neff). (a) m=0; (b) m=1
Fig. 3. Mode distribution. (a) LP01 mode; (b) LP11 mode
Fig. 4. Configuration of the sensor
Fig. 5. Experimental setup used in the temperature sensing measurement
Fig. 6. Transmission spectra of the sensor under different temperatures
Fig. 7. Interference valley wavelength versus temperature
Fig. 8. FFT frequency spectra of transmission spectra under different temperatures
Fig. 9. Effective refractive index difference between LP01 and LP11 versus temperature
Fig. 10. (a)Transmission spectra of the 12-mm-long sensor under different temperatures; (b) interference valley wavelength versus temperature
Fig. 11. (a)Transmission spectra of the 24-mm-long sensor under different temperatures; (b)interference valley wavelength versus temperature
Fig. 12. (a)FFT frequency spectrum of the 12-mm-long sensor; (b)FFT frequency spectrum of the 24-mm-long sensor
Fig. 13. Transmission spectrum of the sensor at the temperature of 130 ℃
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