Design and Optimization of a Single-Mode Multi-Core Photonic Crystal Fiber With the Nanorod Assisted Structure to Suppress the Crosstalk

We propose and design a novel homogeneous nanorod-assisted multi-core photonic crystal fiber (NA-PCF), and it utilizes the flexibility of photonic crystal fiber (PCF) for air-hole design, NA-PCF applied to multi-core fiber (MCF) communication system. High refractive index nanorods are introduced in the center of the seven cores which are further surrounded by a periodical arrangement of air-holes. The air-holes and the nanorods work together to greatly suppress the crosstalk (XT) between the cores. By comprehensively balancing the influence of various parameters on XT, single-mode cutoff wavelength (lambda(cc)) and the effective mode field area (A(eff)), simulation results show that the NA-PCF has a A(eff) of about 70.26 mu m(2), XT of about -50.58 dB/km, relative core multiplicity factor (RCMF) of 4.7 and lambda(cc) of 1530 nm. This designed structure targets applications in large-capacity long-distance MCF communication.

Automated summary

In this study, a novel NA-PCF was proposed and designed for MCF communication systems, utilizing nanorods and air-holes to suppress crosstalk between fiber cores. Simulation results demonstrated that the NA-PCF has potential applications in large-capacity long-distance MCF communication.