Investigation on multi-core fibers with large Aeff and low micro bending loss

Katsunori Imamura,Kunimasa Saitoh,Kazunori Mukasa,Masanori Koshiba,Yukihiro Tsuchida,Ryuichi Sugizaki

doi:10.1364/oe.19.010595

Katsunori Imamura, Kunimasa Saitoh + Show 4 more

Open Access

https://doi.org/10.1364/oe.19.010595

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Journal: Optics Express	Publication Date: May 13, 2011
Citations: 53	License type: cc-by

Affiliation: Furukawa Electric (Japan), Hokkaido University

Abstract

To realize large effective area (Aeff) multi-core fibers (MCFs), the design to suppress the cross-talk and the influence of the cladding diameter on the micro bending loss were investigated. As a result, the MCFs with large Aeff over 100 μm(2) and low micro bending loss were successfully fabricated. The results indicate the importance of fiber design to realize large Aeff MCFs including fiber diameters, which largely affect the micro bending loss property. Additionally, MCF with large Aeff, low attenuation loss and suppressed cross-talk was successfully realized by optimizing the fiber design. The cross-talk properties could be estimated by the simulation based on the coupling power theory taking the influences of the longitudinal fluctuation of core diameter into account.

Highlights

Multi-core fibers (MCFs) have a large potential to increase the transmission capacity drastically by space division multiplexing (SDM)
The low cross-talk properties were successfully realized by the design optimization and could be estimated by the simulation based on the coupled power theory taking the longitudinal fluctuation of core diameter into account
Reported Aeff was same as or smaller than conventional single mode fiber (SMF). This method can be applied for the large Aeff MCFs in this study, so we investigated the effect of this technique on our large

Summary

Introduction

Multi-core fibers (MCFs) have a large potential to increase the transmission capacity drastically by space division multiplexing (SDM). The ways to increase the capacity per one fiber have been intensely studied [8,9] In these reports, the improved modulation formats and the enlarged effective area (Aeff) of transmission fibers was greatly contributed to increase the transmission capacity. For the design of the large Aeff MCFs, the interference between cores and the micro bending loss are the most significant problems, which needs to be addressed. The low cross-talk properties were successfully realized by the design optimization and could be estimated by the simulation based on the coupled power theory taking the longitudinal fluctuation of core diameter into account

Design of multi-core fibers with large Aeff and low cross-talk

Design optimization of core pitch taking the core density into account

Confirmation of the optimized design by fiber fabrication

Estimation of the cross-talk properties by means of coupled power theory

Conclusion