A novel hybrid hexagonal photonic crystal fibre for optical fibre communication

In this paper, a novel hybrid hexagonal Photonic Crystal Fibre(PCF), which harnesses the golden ratio for its elliptical core design, is proposed. This work aspires to exploit circular air holes in the construction of PCF. It aids not only to achieve the desired properties but also to curtail the extravagant efforts needed for the fabrication. The Finite Element Method is used to analyze the properties of the proposed PCF. The proposed PCF possesses a negative dispersion of -270 ps/nm.km, a very high birefringence of 2.3 × 10^-2, a high numerical aperture of 0.49, and a large nonlinear coefficient of 50.58 W^-1km^-1 at the desired wavelength of 1.55 μm used for optical communication. The fabrication tolerance of ± 1-2% variation in air hole diameter is also investigated. The proposed PCF with very high birefringence and a large nonlinear coefficient will be an inevitable candidate for optical broadband communication.