We report the simulation of supercontinuum generation from 2.61 to 8.15 μm in silicon germanium waveguide through resolution of the generalized nonlinear Schrödinger equation using the fourth order Runge-Kutta in the interaction picture method.

We report simulations of pulse evolution along a 5 cm long silicon germanium (SiGe) photonic waveguide. Femtosecond laser pulses of duration 210 fs and wavelength of 4.7 µm close to the first zero dispersion wavelength (ZDW) of SiGe situated at 4.6 µm were used in pumping the SiGe photonic waveguide. Simulations were made by solving the generalised nonlinear Schrödinger equation for the femtosecond pump pulse evolution along the length of SiGe photonic waveguide using the fourth order Runge-Kutta in the interaction picture method. The simulated supercontinum spans the 2.5–8.5 µm spectral region comprising of molecular signatures for most hazardous and greenhouse gases making it attractive for environmental monitoring applications.

Femtosecond laser pulses were simulated for their evolution along the silicon germanium photonic waveguide by solving the generalised nonlinear Schrödinger equation using symmetrized split-step Fourier method. The simulated supercontinuum spans the 2.5 - 8.5μm spectral region