Abstract
A dispersion compensating photonic crystal fiber (DCPCF) with ultra-high chromatic dispersion coefficient and extremely low confinement loss based on a hybrid structure of dual-concentric core photonic crystal fiber (DCC-PCF), and depressed-clad photonic crystal fiber (DeC-PCF), is theoretically investigated. To enhance the performances with regard to dispersion and confinement loss of the proposed DCPCF, a high refractive index Germanium-doped rod is introduced in the central core. For the sake of comparison, two types of DCPCF published previously were simulated simultaneously in this work. The numeric results reveal that the proposed DCPCF has a dispersion coefficient of −51625ps/kmnm and a confinement loss of 6.54×10−4dB/km at a wavelength of 1.55μm; it undeniably has extremely good performances when compared with the other two types of DCPCF. Moreover, it is worthwhile emphasizing that the proposed structure has an advantage of easy fabrication.
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