Low cross talk homogeneous few-mode multi-core fiber with a suspended air-trench and V-type index core

ZengHui Li; ShuGuang Li; Ying Guo; XiaoJian Meng; Yan Wang; LuYao Wang; MengQiang Li; LiLing Ma; Peng Shuai Shao; Chun Wang

doi:10.1364/JOSAB.464165

Journal of the Optical Society of America B
Vol. 39,
Issue 10,
pp. 2840-2848
(2022)
•https://doi.org/10.1364/JOSAB.464165

Low cross talk homogeneous few-mode multi-core fiber with a suspended air-trench and V-type index core

ZengHui Li, ShuGuang Li, Ying Guo, XiaoJian Meng, Yan Wang, LuYao Wang, MengQiang Li, LiLing Ma, Peng Shuai Shao, and Chun Wang

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ZengHui Li, ShuGuang Li, Ying Guo, XiaoJian Meng, Yan Wang, LuYao Wang, MengQiang Li, LiLing Ma, Peng Shuai Shao, and Chun Wang, "Low cross talk homogeneous few-mode multi-core fiber with a suspended air-trench and V-type index core," J. Opt. Soc. Am. B 39, 2840-2848 (2022)

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Table of Contents Category
- Fiber Optics
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About this Article
History
- Original Manuscript: May 16, 2022
- Revised Manuscript: September 15, 2022
- Manuscript Accepted: September 15, 2022
- Published: September 29, 2022

Abstract

We propose a homogeneous 13-core 4 linear-polarized modes fiber based on a suspended air-trench V-type index core (SA-VC) structure that can suppress inter-core cross talk (ICXT) and inter-mode cross talk. The SA structure is used to control ICXT, and the VC structure is used to control inter-mode cross talk. Cross talk and other properties of the fiber are calculated by coupled power theory and the finite element method. The numerical results demonstrate that the SA-VC structure has stronger cross talk suppression ability compared with traditional trench structure, the ICXT meets the requirement of lower than ${-}{30}\;{\rm dB/100}\;{\rm km}$, the effective refractive index difference ($\Delta {n_{\rm{eff}}}$) between modes is greater than ${1.52} \times {{10}^{- 3}}$, the maximum intrinsic loss is 0.189 dB/km, and the relative core multiplicity factor reaches 49.09. Based on the current optical fiber fabrication technology, a manufacturing scheme for this fiber preform is proposed. This design structure aims to be applied to communication systems to increase the transmission capacity of optical fibers.

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	Fiber Properties
$n_{e f f}$ at 1550 nm	1.4518 ( ${L P}_{01}$ ), 1.4498 ( ${L P}_{11}$ ), 1.44684 ( ${L P}_{21}$ ), 1.4453 ( ${L P}_{02}$ )
$A_{e f f}$ at 1550 nm	$137.32 µ m^{2}$ ( ${L P}_{01}$ ), $169.62 µ m^{2}$ ( ${L P}_{11}$ ), $178.81 µ m^{2}$ ( ${L P}_{21}$ ), $111.98 µ m^{2}$ ( ${L P}_{02}$ )
ICXT of ${L P}_{31}$ mode (C band)	$< - 31.78 d B / 100 k m$
$Δ n_{e f f}$ at 1550 nm	$2.01 \times 10^{- 3}$ ( ${L P}_{01} - {L P}_{11}$ ), $2.91 \times 10^{- 3}$ ( ${L P}_{11} - {L P}_{21}$ ), $1.52 \times 10^{- 3}$ ( ${L P}_{21} - {L P}_{02}$ )
Bending loss of ${L P}_{31}$ modeat 1565 nm ( $R = 30 m m$ )	$6.8 \times 10^{- 3} d B / 100 t u r n s$
$λ_{cc}$	1529 nm
Intrinsic loss at 1550 nm	0.189 ( ${L P}_{01}$ ), 0.187 ( ${L P}_{11}$ ), 0.184 ( ${L P}_{21}$ ), 0.182 ( ${L P}_{02}$ )
Dispersion [ps/(nm*km)] at 1550 nm	25.74 ( ${L P}_{01}$ ), 31.86 ( ${L P}_{11}$ ), 39.82 ( ${L P}_{21}$ ), 42.24 ( ${L P}_{02}$ )
Max differential mode group delay at 1550 nm	13.27 (ps/m)
RCMF	49.09

	Fiber Properties
$n_{e f f}$ at 1550 nm	1.4518 ( ${L P}_{01}$ ), 1.4498 ( ${L P}_{11}$ ), 1.44684 ( ${L P}_{21}$ ), 1.4453 ( ${L P}_{02}$ )
$A_{e f f}$ at 1550 nm	$137.32 µ m^{2}$ ( ${L P}_{01}$ ), $169.62 µ m^{2}$ ( ${L P}_{11}$ ), $178.81 µ m^{2}$ ( ${L P}_{21}$ ), $111.98 µ m^{2}$ ( ${L P}_{02}$ )
ICXT of ${L P}_{31}$ mode (C band)	$< - 31.78 d B / 100 k m$
$Δ n_{e f f}$ at 1550 nm	$2.01 \times 10^{- 3}$ ( ${L P}_{01} - {L P}_{11}$ ), $2.91 \times 10^{- 3}$ ( ${L P}_{11} - {L P}_{21}$ ), $1.52 \times 10^{- 3}$ ( ${L P}_{21} - {L P}_{02}$ )
Bending loss of ${L P}_{31}$ modeat 1565 nm ( $R = 30 m m$ )	$6.8 \times 10^{- 3} d B / 100 t u r n s$
$λ_{cc}$	1529 nm
Intrinsic loss at 1550 nm	0.189 ( ${L P}_{01}$ ), 0.187 ( ${L P}_{11}$ ), 0.184 ( ${L P}_{21}$ ), 0.182 ( ${L P}_{02}$ )
Dispersion [ps/(nm*km)] at 1550 nm	25.74 ( ${L P}_{01}$ ), 31.86 ( ${L P}_{11}$ ), 39.82 ( ${L P}_{21}$ ), 42.24 ( ${L P}_{02}$ )
Max differential mode group delay at 1550 nm	13.27 (ps/m)
RCMF	49.09

Abstract

Data availability

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Figures (15)

Tables (3)

Equations (8)

Journal of the Optical Society of America B