Fig. 1. Schematic of testing temperature characteristic of sensing fiber

Fig. 2. Temperature characteristics of sensing fibers with different pitches of (a) LT≈2Lp, (b) LT≈Lp, and (c) LT≈0.5Lp

Fig. 3. States of polarization in fibers with different LT under physical disturbance. (a) LT≈2Lp; (b) LT≈Lp; (c) LT≈0.5Lp

Fig. 4. End views of (a) PANDA fiber, (b) elliptical-core fiber, and (c) PM microstructure fiber

Fig. 5. Temperature-ratio-error characteristic of sensing fiber based on PANDA fiber

Fig. 6. Temperature-ratio-error characteristic of sensing fiber based on elliptical-core fiber

Fig. 7. Temperature-ratio-error characteristic of sensing fiber based on PM microstructure fiber