Design of Broadband Single-Polarization Single-Mode Photonic Crystal Fiber Based on Index-Matching Coupling

A new type broadband single-polarization single-mode photonic crystal fiber based on index-matching coupling is proposed by using the full vector finite-element method. Polarization-dependent loss of the proposed fiber is larger than 24.08 dB/m within a wavelength range from 1.25 to 1.65 , and the single-polarization single-mode operation bandwidth reaches 400 nm.