G.654.E光纤传输链路的MPI研究

MPI study of G.654.E fiber in transmission link

G.654.E光纤应用于传输系统中,因截止波长大以及与收发端设备的耦合方式,可能产生多路径串扰(MPI)从而影响传输性能。为了探究MPI的影响因素,通过窄带外腔激光器/光功率计法在1310 nm光源波长下分析了光纤类型、光纤长度、打圈条件、连接方式和尾纤类型对MPI的影响。实验结果表明:对于短距离链路,可通过热熔代替活动连接器以及打圈滤模来减小MPI;而对于长距离链路,尽量避免不同类型光纤的混合连接。

G.654.E fiber is used in the transmission system, because of the large cut-off wavelength and the coupling method with the transceiver end equipment, multi-path interference(MPI) may occur, which will affect the transmission performance. In order to explore the influencing factors of MPI, this paper analyzes the effects of fiber type, fiber length, looped condition, connection mode and the tail fiber type on the MPI through the narrow-band external cavity laser/optical power meter method in 1310 nm light source wavelength. The experiment results show that, for short-distance links, it is possible to reduce MPI by means of circular filtering and hot-splicing instead of active connectors, for long-distance links, try to avoid mixed connections of different types of optical fibers.