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Mode coupling effects in ring-core fibres for space-division multiplexing systems

Mode coupling effects in ring-core fibres for space-division multiplexing systems
Mode coupling effects in ring-core fibres for space-division multiplexing systems
An optical fiber with weak mode coupling is desirable for future ultrahigh capacity space-division multiplexing (SDM) systems because mode coupling in an optical fiber results in extrinsic loss of the fiber and crosstalk between guided optical modes. To study the feasibility of a ring-core fiber (RCF) for SDM systems, in this paper, we investigate the mode coupling in the RCF supporting five or seven guided mode groups (MGs) at a wavelength of 1550 nm. For this purpose, the coupled mode/power theory with identified spatial power spectrum of random perturbations of fiber axis is used to estimate the bend loss/crosstalk of the RCF due to microbending. It is shown that based on the identified parameters for the spatial power spectrum in the 5/7-MG RCF, the estimated bend loss/crosstalk of the RCF agrees well with experimental results. In addition, the impact of the gradient parameter (α) and refractive index contrast (Δ) of the fiber refractive index profile on bend loss and crosstalk of the RCF is explored. Simulation results indicate that the (Δ) instead of the (α) significantly affects bend loss and crosstalk of the RCF. The magnitude improvement in bend loss by increasing the (Δ) is dependent on the spatial power spectrum.
0733-8724
3365-3372
Jin, Xianqing
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Gomez, Ariel
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Shi, Kai
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Thomsen, Benn C.
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Feng, Feng
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Gordon, George S.D.
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Wilkinson, Timothy D.
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Jung, Yongmin
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Kang, Qiongyue
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Barua, Pranabesh
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Sahu, Jayanta
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Alam, Shaif-ul
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Richardson, David
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O'Brien, Dominic C.
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Payne, Frank P.
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Jin, Xianqing
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Gomez, Ariel
22bb14d9-9bff-4f8d-a33d-5078d629a281
Shi, Kai
97de2dee-c28d-49d9-afce-6016624acd2b
Thomsen, Benn C.
cb3431e3-1e96-4483-b0f4-0838e44d9bc5
Feng, Feng
04f20a64-6bed-42b5-9815-488df06a5929
Gordon, George S.D.
764a07c6-deb9-4d74-8291-d104d3991806
Wilkinson, Timothy D.
513baa9c-ac21-4671-ba63-4e3d27b1022e
Jung, Yongmin
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Kang, Qiongyue
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Barua, Pranabesh
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Sahu, Jayanta
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Alam, Shaif-ul
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Richardson, David
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O'Brien, Dominic C.
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Payne, Frank P.
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Jin, Xianqing, Gomez, Ariel, Shi, Kai, Thomsen, Benn C., Feng, Feng, Gordon, George S.D., Wilkinson, Timothy D., Jung, Yongmin, Kang, Qiongyue, Barua, Pranabesh, Sahu, Jayanta, Alam, Shaif-ul, Richardson, David, O'Brien, Dominic C. and Payne, Frank P. (2016) Mode coupling effects in ring-core fibres for space-division multiplexing systems. Journal of Lightwave Technology, 34 (14), 3365-3372. (doi:10.1109/JLT.2016.2564991).

Record type: Article

Abstract

An optical fiber with weak mode coupling is desirable for future ultrahigh capacity space-division multiplexing (SDM) systems because mode coupling in an optical fiber results in extrinsic loss of the fiber and crosstalk between guided optical modes. To study the feasibility of a ring-core fiber (RCF) for SDM systems, in this paper, we investigate the mode coupling in the RCF supporting five or seven guided mode groups (MGs) at a wavelength of 1550 nm. For this purpose, the coupled mode/power theory with identified spatial power spectrum of random perturbations of fiber axis is used to estimate the bend loss/crosstalk of the RCF due to microbending. It is shown that based on the identified parameters for the spatial power spectrum in the 5/7-MG RCF, the estimated bend loss/crosstalk of the RCF agrees well with experimental results. In addition, the impact of the gradient parameter (α) and refractive index contrast (Δ) of the fiber refractive index profile on bend loss and crosstalk of the RCF is explored. Simulation results indicate that the (Δ) instead of the (α) significantly affects bend loss and crosstalk of the RCF. The magnitude improvement in bend loss by increasing the (Δ) is dependent on the spatial power spectrum.

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RCF_Mode_Coupling1.pdf - Accepted Manuscript
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Accepted/In Press date: 5 May 2016
e-pub ahead of print date: 9 May 2016
Published date: 15 July 2016
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 401741
URI: http://eprints.soton.ac.uk/id/eprint/401741
ISSN: 0733-8724
PURE UUID: 46579a27-b777-43fd-94d0-853493aadc07
ORCID for Yongmin Jung: ORCID iD orcid.org/0000-0002-9054-4372
ORCID for Jayanta Sahu: ORCID iD orcid.org/0000-0003-3560-6152
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058

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Date deposited: 20 Oct 2016 13:58
Last modified: 10 Jan 2022 02:54

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Contributors

Author: Xianqing Jin
Author: Ariel Gomez
Author: Kai Shi
Author: Benn C. Thomsen
Author: Feng Feng
Author: George S.D. Gordon
Author: Timothy D. Wilkinson
Author: Yongmin Jung ORCID iD
Author: Qiongyue Kang
Author: Pranabesh Barua
Author: Jayanta Sahu ORCID iD
Author: Shaif-ul Alam
Author: Dominic C. O'Brien
Author: Frank P. Payne

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