title: Bend-resistant large-mode-area photonic crystal fiber with a triangular-core.
abstract: In view of its feasibility for fabrication and application, a bend-resistant large-mode-area photonic crystal fiber with a triangular core is proposed. In our design, the fiber proposes a solution to the issue of bend distortion. The mode field area of the fundamental mode at the wavelength of 1.064 μm achieves 930 μm² at the straight state and 815 μm² at a bending radius of 30 cm, respectively. The decrement of the mode field area at the bend state is only 12.473% compared to the straight state. Furthermore, when the fiber is bent with a bending radius of 30 cm, numerical results demonstrate that the fiber conforms to single-mode operation conditions and the bending orientation angle can be extended to ±55°. A large mode area at bent state and low sensitivity of bending orientation make the fiber of great potential in high-power fiber lasers.
authors.affiliation: School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: Shuqin
authors.initials: S
authors.lastname: Lou
authors.forename: Wenliang
authors.initials: W
authors.lastname: Lu