Modified Octagonal Photonic Crystal Fiber for Residual Dispersion Compensation over Telecommunication Bands

Anotace: A modified Octagonal Photonic Crystal Fiber (MO-PCF) is proposed and numerically investigated for the purpose of residual dispersion compensation in the optical transmission link. The results show that the proposed fiber with optimized parameters exhibits ultra-flattened negative dispersion over a 300 nm band from 1380 nm to 1680 nm with an average chromatic dispersion of -506 ps/(nm·km) and an absolute variation of 11.3 ps/(nm·km). In addition to large negative dispersion, the proposed MO-PCF also exhibits high birefringence in the order of 0.0207 at the wavelength of 1550 nm. The proposed MO-PCF can be advantageously used especially for residual chromatic dispersion compensation in the wavelength-division-multiplexing optical fiber transmission system. The proposed fiber is easy to fabricate and is tolerant to manufacturing imperfections.