Multicore fiber design housing a fluorine-doped low-latency core and cutoff shifted cores

被引:0
作者
Sagae, Yuto [1 ]
Matsui, Takashi [1 ]
Mori, Takayoshi [1 ]
Nakajima, Kazuhide [1 ]
机构
[1] NTT Corp, Access Network Serv Syst Labs, 1-7-1 Hanabatake, Tsukuba, Ibaraki 3080805, Japan
关键词
Optical fiber design; Heterogeneous multicore fiber; Low latency fiber; Cutoff shifted fiber; Carrier phase estimation; STANDARD CLADDING DIAMETER;
D O I
10.1016/j.yofte.2024.103993
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
Design of heterogeneous 4-core fiber housing a low-latency core and conventional cutoff shifted cores in a standard 125-mu m cladding diameter is investigated to enable signal processing delay reduction using common mode impairment. For the low-latency core, 1-mu s propagation delay reduction and an optical signal-to-noise ratio (OSNR) comparable to or greater than that of cutoff shifted cores are required. In this paper, we consider an Fdoped core and depressed cladding structure with a large effective area as the low-latency core. It can be expected to achieve sufficient group delay reduction of the low-latency core, the OSNR unification among heterogeneous cores, and low inter-core crosstalk in a standard 125-mu m cladding diameter. Consequently, we revealed the optimized low-latency core achieving the group delay reduction of 1 mu s and the OSNR as same level as the cutoff shifted cores as we expected. The designed heterogeneous 4-core fiber with the standard 125-mu m cladding diameter suppressed the inter-core crosstalk to be low enough to support a 1,000-km long transmission. We expect the figure-of-merit (FoM) of the 4-core fiber to be as high as previously reported 4-core fibers, and the FoM improvement are found when the low latency core and cutoff shifted core are placed alternately thanks to the core heterogeneity.
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页数:6
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