It has been observed that dispersion of a standard single mode fiber (SMF)is lowest at 1300 nm, whereas it has minimum attenuation at 1550 nm. But at 1500 nm wave length the dispersion is higher. The problem of dispersion can be compensated by inserting an element that imposes dispersion on the optical signal that is opposite (negative) to that imposed by optical fiber. Most common is the use of the dispersion compensation fiber (DCF), with strong negative dispersion, placed at regular intervals along the link It can actually reverse the effects of dispersion suffered by 1550 nm signals that traverse standard single-mode fiber. But it has the disadvantage of high cost, physical size, signal delay and lack of adaptability. The attenuation of the DCF requires additional optical amplifiers, which introduce additional optical noise.