A photonic crystal fiber for supporting 30 orbital angular momentum modes with low dispersion

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2020,（1）
• 页码范围: 34-39
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11801-020-9072-7

摘要

This paper proposes a novel photonic crystal optical fiber which can support 30 orbital angular momentum (OAM) modes transmission and possesses relatively flat and low dispersion.The OAM modes can be well-separated due to the large effective refractive index difference (above 10-4) between the eigenmodes.The only material of the designed fiber is silica.The dispersion of each OAM mode is controlled in the range of 50-100 ps·nm-1 ·km-1 and the total dispersion variation is below 10 ps·nm-1 ·km-1 from 1 500 nm to 1 600 nm.Moreover,the confinement loss of each OAM mode is below 8.17×10-10 dB/m at 1 550 nm,and the nonlinear coefficients is less than 0.71 W-1/km for all modes at 1 550 nm.With all these good features,this proposed optical fiber is promising to be applied in fiberbased OAM communication systems.