Theoretical Design of Low-loss Single-Polarization Single-Mode Microstructured Polymer optical Fiber

A new structure for single-polarization single-mode photonic-crystal fiber is proposed and numerically analyzed by using a full vector finite element method with anisotropic perfectly matched layers. The confinement loss are also numerically calculated and optimized at 650-nm communication wavelength of polymer optical fiber. According to numerical results，the proposed fiber is low-loss single-polarization single-mode photonic-crystal fiber within the wavelengths range from 0.63 µm to 0.73 µm, where only the slow-axis mode exists and the confinement loss is less than 0.05 dB/m.