Hi jyoti..
Well DCF are meant to mitigate the effects of dispersion which occurs to the pulses during propagation. So I believe employing these would surely help. You can go through the following link for few subtopics on dispersion compensation:
optiwave.com/category/optisystem-manuals/optisystem-tutorials/page/10/
Kindly copy paste the link address in another tab if it doesn’t open here.
Also, could you mention the name of the other topic which are talking of ? I’d be glad to check it.
Regards.