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