Fiber Twisting- and Bending-Induced Adiabatic/Nonadiabatic Super-Mode Transition in Coupled Multicore Fiber
Fiber Twisting- and Bending-Induced Adiabatic/Nonadiabatic Super-Mode Transition in Coupled Multicore Fiber
复制标题
耦合多芯光纤中光纤扭转和弯曲引起的绝热/非绝热超模转变
DOI：
10.1109/jlt.2015.2502260
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发表时间：
2016
影响因子：
4.7
通讯作者：
K. Nakajima
中科院分区：
文献类型：
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作者：
T. Sakamoto;T. Mori;M. Wada;Takashi Yamamoto;F. Yamamoto;K. Nakajima
通过数值和实验研究了耦合多芯光纤中超模之间的功率传输特性。我们揭示了光纤扭曲和宏弯曲通过绝热/非绝热过程引起模式耦合，这与结构扰动（即微弯曲）引起的模式耦合不同。我们还研究了耦合两芯光纤的脉冲响应特性，发现存在一个最佳纤芯节距，可以最大限度地降低 MIMO 处理的复杂性。最后，我们利用两芯光纤进行了4×4 MIMO传输实验，以评估其传输特性。我们表明，即使传输线具有较大的与纤芯相关的增益/损耗值，强耦合多芯光纤也可以减少接收信号之间的质量差异。
The characteristics of power transfer between super-modes in coupled multicore fiber are investigated numerically and experimentally. We reveal that fiber twisting and macrobending cause mode coupling through an adiabatic/nonadiabatic process, which is different from the mode coupling caused by structural perturbation, namely microbending. We also investigate the impulse response characteristics of coupled two-core fibers, and find that there is an optimum core pitch for minimizing the complexity of the MIMO processing. Finally, we conduct a 4 × 4 MIMO transmission experiment using two-core fibers to evaluate their transmission characteristics. We show that strongly coupled multicore fiber can reduce the quality difference between the received signals even when the transmission line has large core-dependent gain/loss values.