Dear Omar,
You may find actual DCF fiber data files in OptiSystem Example Library located at the following link. However, are you sure that the cause of the issue you are experiencing in the constellation is due to dispersion?
C:\Users\USER NAME\Documents\OptiSystem 16.0 Samples\Fiber analysis and design\DCF (Standard) optical fiber data files
You may contact me at ahmad.atieh@optiwave.com for further discussion.
Regards,
Ahmad