Low-DMGD, Large-Effective-Area and Low-Bending-Loss 12-LP-Mode Fiber for Mode-Division-Multiplexing

Huan Zhang,Jian Zhao,Guanju Peng,Zixiang Di,Zhiqun Yang

doi:10.1109/jphot.2019.2924834

Huan Zhang, Jian Zhao + Show 3 more

Open Access

https://doi.org/10.1109/jphot.2019.2924834

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Journal: IEEE Photonics Journal	Publication Date: Aug 1, 2019
Citations: 28	License type: CC BY 4.0

Affiliation: Tianjin University

Abstract

We report the design of 12-LP-mode (21-spatial-mode) fiber with a low differential mode group delay (DMGD), a large effective area, and a low bending loss that is adapted to a mode-division-multiplexing system over the C+L band. Based on the designed fiber parameters, we characterize the few-mode fiber (FMF) with the DMGD, an effective area, and a bending loss. Over the C+L band, the maximum DMGD is 0.106 ps/m, and the effective area is in the range of 150∼485 μ m2. The bending loss of the designed FMF reduces to zero when the bending radius is greater than 9 mm, and the DMGD is below 0.0413 ps/m at the wavelength of 1550 nm.

Highlights

With the booming development of emerging businesses and applications such as cloud computing and Internet of things, the growth of network broadband demand is accelerating in recent years
We analyze the differential mode group delay (DMGD) between LPmn mode and LP01 mode of the designed few-mode fiber (FMF)
Because the complexity of digital signal processing is determined by the maximum DMGD, Fig. 4 shows how Max|DMGD| varies with wavelength

Summary

Introduction

With the booming development of emerging businesses and applications such as cloud computing and Internet of things, the growth of network broadband demand is accelerating in recent years. Space-division multiplexing (SDM) has attracted much attention to break through the limit of channel capacity of SMFs [1], [2]. SDM includes multi-core multiplexing (MCM) [3] and mode-division multiplexing (MDM) [4]. For MDM system, the increase of channel capacity is proportional to the number of modes guided by the FMFs. And in the strongly coupled regime, transfer matrix satisfies unitary matrix under the condition that the mode dependent loss can be ignored. MIMO technology can deal with the mode coupling, but more complex digital signal processing techniques are required. It is desirable to minimize DMGD and increase effective area in order to reduce computation complexity and nonlinear effect in MDM system [6]

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Results

Conclusion