Fig. 1. Second- and fourth-order dispersion as a function of the wavelength for As₂Se₃ chalcogenide glass

Fig. 2. Schematic of As₂Se₃ chalcogenide ridge waveguide

Fig. 3. Second-order dispersion as a function of the wavelength for As₂Se₃ ridge waveguide with different ridge widths (The ridge height and etch depth are 0.8 μm and 0.6 μm, respectively.)

Fig. 4. (a) Second and (b) fourth-order dispersion as a function of the wavelength for As₂Se₃ ridge waveguide with different etch depths (The ridge width and height are 1.5 μm and 0.8 μm, respectively.)

Fig. 5. Nonlinear coefficient of As₂Se₃ ridge waveguide (W=1.5 μm,H=0.8 μm,h=0.6 μm) as a function of wavelength

Fig. 6. (a) Frequency translation efficiency curve and (b) phase mismatch curve for different pump wavelengths with pump power of 0.35 W; (c) parametric gain spectra for different pump wavelength at a pump power of 2 W

Fig. 7. Phase-matched signal wavelength and idler wavelength as a function of pump wavelength with pump powers of 0.35 W and 2 W

Fig. 8. Phase-matched mid-infrared signal wavelength as a function of pump power with a pump wavelength of 1955 nm