Fig. 1. Structure of double-trench-assisted fan-segmented cladding fiber

Fig. 2. Equivalent refractive index profile of double-trench-assisted fan-segmented cladding fiber

Fig. 3. Structures of fan-segmented cladding fibers. (a) ST-FSCF; (b) FSCF

Fig. 4. Effect of core radius on fiber properties. (a) Leakage loss as a function of core radius; (b) mode area and loss ratio as functions of core radius

Fig. 5. Effect of bending orientation on fiber properties. (a) Leakage loss as a function of bending orientation; (b) mode area and loss ratio as functions of bending orientation

Fig. 6. Mode field distributions of LP₀₁, LP_11v, LP_11h, and LP₂₁ modes at different bending orientations. (a) φ=0°; (b) φ=22.5°

Fig. 7. Effect of bending radius on fiber properties. (a) Leakage loss as a function of bending radius; (b) mode area and loss ratio as functions of bending radius

Fig. 8. Bending loss and mode area as functions of trench width. (a) t₁; (b) t₂

Fig. 9. Bending loss and mode area as functions of resonant ring thickness. (a) d₁; (b) d₂

Fig. 10. Effect of wavelength on fiber properties. (a) Leakage loss as a function of wavelength; (b) mode area and loss ratio as functions of wavelength

Fig. 11. Bending loss and mode area as functions of index difference. (a) Δn₁; (b) Δn₂

Fig. 12. Combined effect of resonant ring thicknesses d₁ and d₂ on fiber properties. (a) Loss of FM; (b) minimal loss of HOM; (c) loss ratio