Fig. 1. Structure of triangular core silicon photonic crystal fiber and fundamental mode electric field distribution at 2.6 µm wavelength. (a) Cross-section of triangular core silicon photonic crystal fiber; (b) fundamental mode electric field distribution at 2.6 µm wavelength

Fig. 2. Effect of different pore diameter combinations on dispersion distribution of photonic crystal fiber. (a) Effect of d₁ is 0.2, 0.3, and 0.4 µm, respectively on dispersion distribution when d₂=0.2 µm, d₃=0.5 µm, d₄=1.0 µm; (b) effect of d₂ is 0.2, 0.3, and 0.4 µm, respectively on dispersion distribution when d₁=0.2 µm, d₃=0.5 µm, d₄=1.0 µm; (c) effect of d₃ is 0.4, 0.5, and 0.6 µm, respectively on dispersion distribution when d₁=0.2 µm, d₂=0.2 µm, d₄=1.0 µm; (d) effect of d₄ is 0.8, 0.9, and 1.0 µm, respectively on dispersion distribution when d₁=0.2 µm, d₂=0.2 µm, d₃=0.5 µm

Fig. 3. Effect of different d₄ on imaginary part of effective refractive index of photonic crystal fiber and distribution of effective mode field and nonlinear coefficient. (a) Effect of d₄ is 0.6, 0.8, and 1.0 µm, respectively on imaginary part of effective refractive index of photonic crystal fiber when d₁= 0.2 µm, d₂= 0.2 µm, d₃= 0.5 µm; (b) distribution of effective mode field area and nonlinear coefficients of selected structure

Fig. 4. Spectrum evolution in frequency domain and time domain during optical pulse transmission. (a) Transmission process of pulses in frequency domain; (b) transmission process of pulses in time domain

Fig. 5. Supercontinuum spectra generated at peak power of 200, 850, and 1500 W, respectively

Fig. 6. Supercontinuum spectra generated at pumping wavelength of 2.6, 2.7, 2.8, and 2.9 µm, respectively