Design and optimization of weakly-coupled few-mode fiber with low nonlinearity

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2014,（3）
• 页码范围: 8-10
• 页数: 3页
• 语种: 英文
• DOI: 10.3788/COL201412.030601

摘要

By investigating the influence of the difference of refractive index between core and cladding (nco-nc1),normalized frequency (V) and core radius (α) on both the intramodal and intermodal nonlinear coefficients (NCs) respectively,we design a novel weakly-coupled four-mode fiber with low nonlinearity.In general,under the premise of ensuring the low NCs between two non-degenerate modes,this design can reduce the intermodal NCs (＜ 0.5 W-1·km-1) between two degenerate modes and optimizes the parameters of differential group delays (DGDs) and chromatic dispersion.The optimized few mode fiber (FMF) is eligible for transmission and mode de-multiplexing in the receiver.