Chen Ming-Yang, Zhou Jun
Opt Express. 2014 Jan 27;22(2):1440-51. doi: 10.1364/OE.22.001440.
A multi-core fiber coupler is proposed to extract one of the modes in a few-mode optical fiber from a light beam, leaving the other modes undisturbed, and allowing a new signal to be retransmitted on that mode. Selective coupling of higher-order modes from a few-mode optical fiber can be realized by increasing the coupling length difference of the modes in the fiber using the multi-core configuration. Low cross-talk and wide bandwidth operation are realized owing to the fact that only one mode can be effectively coupled.
提出了一种多芯光纤耦合器，用于从光束中提取少模光纤中的一种模式，而不干扰其他模式，并允许新信号在该模式上重新传输。通过使用多芯配置增加光纤中模式的耦合长度差，可以实现从少模光纤中选择性耦合高阶模式。由于只能有效地耦合一种模式，因此实现了低串扰和宽带宽操作。
