hi all,
i appreciate alistu answer on this.
yes it is also true that optical amplifier (black box) provides the better results as compared to EDFA for simple optical designs in opotisystem.
but for practical purposes , there nothing like optical amplifier(black box, we have EDFA, raman amplifiers, HYbrid amplifiers.
thus in actual practical application we must use the amplifier that can be used in field.
with regards