Few-Mode Fibers Supporting More Than Two LP Modes For Mode-Division-Multiplexed Transmission With MIMO DSP

被引：108

作者：

Mori, Takayoshi ^{[1
]}

Sakamoto, Taiji ^{[1
]}

Wada, Masaki ^{[1
]}

Yamamoto, Takashi ^{[1
]}

Yamamoto, Fumihiko ^{[1
]}

机构：

[1] NTT Corp, Access Network Serv Syst Labs, Tsukuba, Ibaraki 3050805, Japan

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2014年 / 32卷 / 14期

关键词：

Differential mode delay; few-mode fibers; multiple-input multiple-output; OPTICAL-FIBER; DELAY; LINE;

D O I：

10.1109/JLT.2014.2327619

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 propose a transmission fiber for mode-division-multiplexed transmission with multiple-input multiple-output (MIMO) digital signal processing supporting four and six linearly polarized (LP) modes over the C + L band. We 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 few-mode operation of more than two LP modes and low DMD while preventing the high-refractive index difference that leads to manufacturing difficulties and any loss increase. Finally, we successfully fabricated fibers for use in a C + L band WDM-MDM transmission with MIMO DSP, and realized a transmission fiber with a total absolute DMD of less than 40 ps/km for four-LP mode operation and of less than 70 ps/km for six-LP mode operation over the entire C + L band.

引用

页码：2468 / 2479

页数：12

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