OmniSim and CrystalWave's FDTD and FETD engines can be used to model propagation through arbitrary nonlinear structures.

Examples:

• Soliton (FETD,chi3)

PICWave can be used to model nonlinear effects in active devices within large optical circuits, allowing you for instance to characterise the effect of four-wave mixing on the response.

Examples:

• SOA

PICWave can be used for the design and simulation of periodically-poled nonlinear sections (e.g. periodically-poled lithium niobate - PPLN) for second harmonic generation, phase sensitive amplification and wavelength conversion.

Examples:

• Nonlinear optics PPLN