Wideband Dispersion Compensation in Square Lattice Photonic Crystal Fibe

In the present study, a new structure has been suggested for dispersion compensating photonic crystal fibers in order to broaden the chromatic dispersion compensation band, effectively. In the proposed structure, putting a combinations of circular holes and a star structure in the inner clad causes the dispersion profile to be broadened. Also, this photonic crystal fiber comprising a negative dispersion coefficient in the whole S to U telecommunication bands. In this fiber, the minimal dispersion coefficient is -653ps/(nm.km). Furthermore, in this structure by increasing the diameter of the circular holes of the inner clad, a relatively flat dispersion profile is obtained in the whole E to U telecommunication bands with maximum variation of 46ps/(nm.km). In the S to C telecommunication bands, the dispersion variation is 17ps/(nm.km). The simulations are all done using the finite difference time domain (FDTD) numerical method