Dear Mahmoud,
OptiSystem allows users to directly modulate MM-lasers to create multimode transmission systems.
You may refer to the examples in OptiSystem Example library located at the following link for more information and guidance.
Please contact me at ahmad.atieh@optiwave.com if you’d like to discuss further.
C:\Users\USER NAME\Documents\OptiSystem 17.0 Samples\Multimode systems
Regards,
Ahmad