空分复用光纤研究综述

Review of Space Division Multiplexing Fibers

在多媒体和数据应用程序快速扩展和驱动骨干网带宽需求量迅速增长的网络背景下,时分、波分、偏分复用技术与多级调制方式结合,使得大容量传输系统中单模光纤容量快速接近香农理论极限。空分复用(SDM)技术可以突破该限制,为未来光纤容量增长提供新的解决方案。通过讨论多芯光纤、少模/多模光纤和少模多芯光纤三种SDM技术方案,详细介绍了SDM光纤的研究进展及研究方法,同时对三种光纤方案进行对比,阐明了各种方案的优劣性。

The rapid growth of multi-media and data applications has driven the bandwidth demand for long-haul fiber-optic links at unprecedented rates. Against this background, the combination of time division multiplexing, wavelength division multiplexing, and polarization division multiplexing with multilevel modulation makes the transmission capacity of single-mode fibers in the large-capacity transmission system rapidly approach the Shannon limit. In view of this problem, the space division multiplexing(SDM) technology that can break through this limit provides new solutions for the growth of fiber capacity in the future. In this paper, we discuss three kinds of SDM fibers, namely, multi-core fiber, few-mode/multi-mode fiber and few-mode multi-core fiber, and introduce the research progress and design method of the SDM fibers. Furthermore, the comparison among the above SDM fibers is also discussed to reveal their advantages and disadvantages.