Microstructured optical fiber for residual dispersion compensation over S+C+L+U wavelength bands

A defected-core microstructured optical fiber (MOF) is numerically investigated for the purpose of residual chromatic dispersion compensation from telecom link. The designed MOF exhibits ultraflattened negative dispersion over S + C + L + U wavelength bands and average dispersion of about - 179 ps/nm/km with an absolute dispersion variation of 2.1 ps/mn/km from 1.480 to 1.675 mu m (195-nm bandwidth). The designed fiber has eight rings of holes in the cladding resulting in low confinement loss of similar to 0.002 dB/km at 1.55 mu m, and small effective mode area -6 mu m(2). To evaluate the feasibility of such proposed MOF, a dimensional sensitivity analysis and an evaluation of coupling efficiency between the designed fiber and a conventional single-mode fiber have been carried out.