In order to solve the mode crosstalk in the mode division multiplexing system
this paper proposes a kind of microstructured few-mode fiber with high Mode Differential Group Delay(MDGD).The mode field distribution and the effective index are studied by using the Comsol software based on full-vector finite element method
and the MDGD is also analyzed.Simulation results show that the MDGD of LP11
LP21
LP02 versus LP01are 8.45
19.28
23.25ps/m
compared with the traditional few-mode fiber.It is also shown that the designed few-mode fiber has excellent high MDGD characteristics
which can solve the mode crosstalk problem efficiently
which may have important application in the mode division multiplexing system.
关键词
模分复用微结构光纤有限元分析法有效折射率模式差分群时延
Keywords
mode division multiplexingmicro-structured fiberfinite element analysiseffective refractive indexmode differential group delay