Design of hybrid photonic crystal fiber: Polarization and dispersion properties

• The research article proposed a dispersion compensating fiber (DCF).
• This DCF provides high negative dispersion coefficient of −1054.4 ps/(nm km) at 1550 nm.
• A small length of the DCF is required to compensate the long standard SMF.
• In the structure only circular air-hole is used to realize high birefringent. This circular air-hole reduces fabrication complexity.
• The proposed PCF can cover E + S + C + L bands for 40 Gbps transmission system.

A highly birefringent dispersion compensating hybrid photonic crystal fiber is presented. This fiber successfully compensates the chromatic dispersion of standard single mode fiber over E- to L-communication bands. Simulation results reveal that it is possible to obtain a large negative dispersion coefficient of about −1054.4 ps/(nm km) and a relative dispersion slope of 0.0036 nm−1 at the 1550 nm wavelength. The proposed fiber simultaneously provides a high birefringence of order 3.45 × 10−2 at the 1550 nm. Moreover, it is confirmed that the designed fiber successfully operates as a single mode in the entire band of interest. For practical conditions, the sensitivity of the fibers dispersion properties to a ±2% variation around the optimum values is carefully studied and the nonlinearity of the proposed fiber is also reported and discussed. Such fibers are essential for high speed transmission system as a dispersion compensator, sensing applications, fiber loop mirrors as well as maintaining single polarization, and many nonlinear applications such as four-wave mixing, etc.