Design of a Solid-Core Large-Mode-Area Bragg Fiber

We report the design and simulation results of a solid-core Bragg fiber with 3-bilayer periodic cladding. The simulation results present single mode bandgap guidance, a large effective area of ～400 μm² around 1.08 μm, a very low bend loss of 0.038 dB/m at 1.08 μm even under tight bend radius (R=4 cm), and excellent beam quality. The results indicate that the proposed fiber could be a competitive solution for high-power fiber laser applications.