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We investigate numerically a defected-core hybrid photonic crystal fibre (H-PCF) with a circular core and a rectangular-shaped cladding, which is designed for compensation of residual dispersion over a wide wavelength range. Our simulation results testify that this H-PCF exhibits a large negative dispersion (- 868 ps/(nm km)) over the E+S+C+L telecommunication bands, with the relative dispersion slope perfectly matching that of a single-mode fibre at the operating wavelength 1550 nm. The H-PCF reveals the birefringence 1.06×10 -2 at the operating wavelength. In order to evaluate the sensitivity of optical properties of our H-PCF, we study the effect of variations of its parameters as large as ±2% from their optimal values. Due to its specific characteristics, the H-PCF suggested in this work can be considered as an excellent candidate for compensating dispersion, maintaining a single polarization in the optical fibre transmission systems, and numerous optical sensing applications.

Design of polarization-maintaining photonic crystal fibre for dispersion compensation over the E+S+C+L telecom bands