Hi Hui Jing,
Simulating a chalcogenide fiber can be as easy as changing the dispersion parameter (D) and nonlinear index of refraction (n2) in our Optical Fiber component. Of course for more accuracy, it is better to correct as many parameters as possible. For instance, the effective area of a highly nonlinear fiber generally should be much smaller than that of an SMF – 28 fiber, which is what our default settings represent. Going deeper, you might also want to add third order dispersion and in this case you would want a B3 that corresponds to your fiber.
Regards,
Damian