Fourteen-core dual-mode fiber with low bending loss and large mode area

Abstract

A 37-core optical fiber with 14 air holes is proposed in this paper. This optical fiber can transmit the fundamental mode and part of the second mode. Effects of structure parameters on effective refractive index, bending loss and effective area of the fundamental mode HE11 and the second-order mode HE21 are investigated systematically. By adjusting the structure parameters, at wavelength of 1550 nm and bending radius of 5 cm, the effective mode field area of the fundamental mode is 1776.289 μm2 , and the bending loss is 4.656×10-5 dB/m. Due to the flexibility of multi-core structure, it is significant for theoretical research and practical manufacturing.