Highly Birefringent Polarization Maintaining Photonic Crystal Fiber with Ultralow Confinement Loss at 1.55µm Wavelength

In this work, a highly birefringent photonic crystal fiber with ultra low confinement loss using silica is proposed. The birefringence is achieved by introducing the asymmetry along the radial axis. The symmetric cladding structure results in very low confinement loss by limiting the light in the core region. The proposed design is analyzed and simulated using FDTD simulation software and the fiber shows high birefringence (0.0073) and ultra low confinement loss (0.003 dB/km) at 1.55μm wavelength, which makes the photonic crystal fiber endlessly single mode fiber and highly polarization maintaining.