Yueyu Xiao, Ying Tang, Zhaohui Zhu. Few-Mode Fiber Temperature Sensors Based on Modal Interference Between Orbital Angular Momentum Modes[J]. Laser & Optoelectronics Progress, 2021, 58(9): 0906003
- Laser & Optoelectronics Progress
- Vol. 58, Issue 9, 0906003 (2021)
Fig. 1. Amplitude and phase distributions of the OAM1 and OAM2 modes. (a) Amplitude of OAM1; (b) phase of OAM1; (c) amplitude of OAM2; (d) phase of OAM2
Fig. 2. Intensity distributions of the output of the fiber with different phase differences. (a) 0°; (b) 90°; (c) 180°; (d) 270°
Fig. 3. Relationship between the demodulated phase difference and the temperature
Fig. 4. Outputs and scale factor errors of the LP modal interference sensor versus temperatures
Fig. 5. Field distribution in the presence of normally distributed noise
Fig. 6. Demoduled signal in the presence of normally distributed noise. (a) With normally distributed noise; (b) without noise
Fig. 7. Phase differences demodulated in the presence of distributed noise
Fig. 8. Field distribution in the presence of a Gaussian spot noise
Fig. 9. Demodulated signal in the presence of Gaussian spot noise. (a) With Gaussian spot noise; (b) without noise
Fig. 10. Demodulated phase differences in the presence of Gaussian spot noise
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Table 1. Relationship between the phase differences of OAM1 and OAM2 and temperatures
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