HELLO ZULKARNAIN..
I want to clear it to you that optical amplifiers are used for amplification purpose only not for dispersion compensation.. for dispersion compensation techniques Dhiman has rightly said that you need Dispersion Compensating fibers DCFs which iskind of fiber which has a negative dispersion coefficient so you can use it before or after the fiber… just manually calculate the single mode fiber (SMF) dispersion and accordingly connect the required length of the DCF and eliminate dispersion effect…. Pre-, post-, and symmetrical-compensation can be done by using DCF…I hope it helps..
Thanks & regards