A novel photonic quasi-crystal fiber for transmission of orbital angular momentum modes

作者：Liu, Qiang; Lu, Wenshu; Sun, Yudan; Lv, Jingwei; Liu, Wei; Liu, Chao^*; Tai, Shengnan; Li, Binwen; Zhao, Jin; Jiang, Yu; Sun, Tao; Chu, Paul K.

来源：Optik, 2022, 251: 168446.

DOI：10.1016/j.ijleo.2021.168446

• OAM
• Photonic quasi-crystal fiber
• Confinement loss
• Nonlinear coefficient

A photonic quasi-crystal fiber (PQF) based on the 12-fold symmetry quasi-periodic structure is designed for transmission of orbital angular momentum (OAM) modes. In this PQF, the effective refractive index difference of the degenerate modes is greater than 10-4 and 110 high-quality OAM modes in the wavelength range between 1.46 and 1.60 mu m are supported. The characteristics of the PQF are numerically analyzed by the finite element method. This PQF with a confinement loss of less than 10-9 dB/m and effective mode area larger than 100 mu m2 has many potential applications in mode division multiplexing for fiber communication systems.