Few-mode fiber technology for mode division multiplexing

被引:23
|
作者
Mori, Takayoshi [1 ]
Sakamoto, Taiji [1 ]
Wada, Masaki [1 ]
Yamamoto, Takashi [1 ]
Nakajima, Kazuhide [1 ]
机构
[1] NTT Corp, NTT Access Network Serv Syst Labs, Tokyo, Japan
关键词
Few-mode fiber; Mode division multiplexing; Differential mode delay; OPTICAL MIMO TRANSMISSION; MULTIMODE FIBER; LOW-DMD; LINE;
D O I
10.1016/j.yofte.2016.07.011
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We review recent progress on few-mode fiber (FMF) technologies for mode-division multiplexing (MDM) transmission. First, we introduce fibers for use without and with multiple-input multiple-output (MIMO) digital signal processing (DSP) to compensate for modal crosstalk, and briefly report recent work on FMF for use without/with a MIMO DSP system. We next discuss in detail a fiber for MIMO transmission systems, and show numerically that a graded-index core can flexibly tune the differential mode group delay (DMD) and a cladding trench can flexibly control the guiding mode number. We optimized the spacing of the core and trench. Accordingly, we can achieve a 6 LP (10 spatial) mode operation and a low DMD while preventing the high index difference that leads to manufacturing difficulties and any loss increase. We finally describe our experimental results for a 6 LP (10 spatial) mode transmission line for use in a C + L band wavelength-division multiplexing (WDM) MDM transmission with MIMO DSP. (C) 2016 Elsevier Inc. All rights reserved.
引用
收藏
页码:37 / 45
页数:9
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