Space-division multiplexing: the next frontier in optical communication
Space-division multiplexing: the next frontier in optical communication
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DOI：
10.1364/aop.6.000413
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发表时间：
2014-12-01
影响因子：
27.1
通讯作者：
Xia, Cen
中科院分区：
文献类型：
--
作者：
Li, Guifang;Bai, Neng;Xia, Cen
空分复用(SDM)利用多种空间信道来增加光通信的容量。它既适用于自由空间光通信，也适用于导波光通信。本文重点研究了利用少模光纤或多模光纤进行光纤通信的同步数字调制器，特别是模式串扰的关键挑战。为无线通信开发的多输入多输出(MIMO)均衡方法可以作为一种电子方法来均衡模式串扰。为了使MIMO模式串扰均衡的计算复杂度达到实用水平，需要采用包括差分模群延迟管理、强模式耦合和多芯光纤在内的光学方法。综述了无源器件(如多路分解器)和有源器件(如放大器和开关)的进展，与模式串扰相比，这些器件被认为是直接的挑战。最后，展望了SDM在光传输和组网中的应用前景。(C)2014年美国光学学会。
Space-division multiplexing (SDM) uses multiplicity of space channels to increase capacity for optical communication. It is applicable for optical communication in both free space and guided waves. This paper focuses on SDM for fiber-optic communication using few-mode fibers or multimode fibers, in particular on the critical challenge of mode crosstalk. Multiple-input-multiple-output (MIMO) equalization methods developed for wireless communication can be applied as an electronic method to equalize mode crosstalk. Optical approaches, including differential modal group delay management, strong mode coupling, and multicore fibers, are necessary to bring the computational complexity for MIMO mode crosstalk equalization to practical levels. Progress in passive devices, such as (de) multiplexers, and active devices, such as amplifiers and switches, which are considered straightforward challenges in comparison with mode crosstalk, are reviewed. Finally, we present the prospects for SDM in optical transmission and networking. (C) 2014 Optical Society of America.