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Optical amplifiers for mode division multiplexing

Optical amplifiers for mode division multiplexing
Optical amplifiers for mode division multiplexing
Space division multiplexing (SDM) has attracted considerable attention from the optical fiber communication community as a promising means to increase the transmission capacity per fiber and, more importantly, to reduce the associated cost per transmitted information bit by utilizing multiple spatial channels within a single strand of glass. Various SDM transmission fibers, for example, few-mode fibers, multicore fibers, and few-mode multicore fibers, have been proposed, and the possibility to support capacities beyond that of conventional single-mode fiber technology has now been proven. However, in order to realize the potential energy and cost savings offered by SDM systems, the individual spatial channels should be simultaneously multiplexed, transmitted, amplified, and switched with associated SDM components and subsystems. In particular, SDM amplifiers can simultaneously amplify multiple spatial channels in a single device and can provide significant space, cost, and energy savings from component sharing and device integration. In this chapter, we will review the current state of the art in optical amplifiers for the various SDM approaches under investigation – with particular focus on few-mode fiber amplifiers for mode division multiplexing. In these amplifiers, differential modal gain (or mode-dependent gain) is the most important property, and various mitigation strategies are introduced/highlighted in this chapter. Afterwards, we will focus in particular on both core-pumped and cladding-pumped 6-mode erbium-doped fiber amplifiers as practical implementation examples and will further discuss differential modal gain control for both pumping configurations. Finally, the remaining challenges to realizing practical few-mode fiber amplifiers are discussed, and future prospects for the few mode fiber amplifier are envisioned.
Springer
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Alam, Shaif-Ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Peng, G.D.
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Alam, Shaif-Ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Peng, G.D.

Jung, Yongmin, Alam, Shaif-Ul and Richardson, David J. (2018) Optical amplifiers for mode division multiplexing. In, Peng, G.D. (ed.) Handbook of Optical Fibers. Singapore. Springer. (doi:10.1007/978-981-10-1477-2_49-1).

Record type: Book Section

Abstract

Space division multiplexing (SDM) has attracted considerable attention from the optical fiber communication community as a promising means to increase the transmission capacity per fiber and, more importantly, to reduce the associated cost per transmitted information bit by utilizing multiple spatial channels within a single strand of glass. Various SDM transmission fibers, for example, few-mode fibers, multicore fibers, and few-mode multicore fibers, have been proposed, and the possibility to support capacities beyond that of conventional single-mode fiber technology has now been proven. However, in order to realize the potential energy and cost savings offered by SDM systems, the individual spatial channels should be simultaneously multiplexed, transmitted, amplified, and switched with associated SDM components and subsystems. In particular, SDM amplifiers can simultaneously amplify multiple spatial channels in a single device and can provide significant space, cost, and energy savings from component sharing and device integration. In this chapter, we will review the current state of the art in optical amplifiers for the various SDM approaches under investigation – with particular focus on few-mode fiber amplifiers for mode division multiplexing. In these amplifiers, differential modal gain (or mode-dependent gain) is the most important property, and various mitigation strategies are introduced/highlighted in this chapter. Afterwards, we will focus in particular on both core-pumped and cladding-pumped 6-mode erbium-doped fiber amplifiers as practical implementation examples and will further discuss differential modal gain control for both pumping configurations. Finally, the remaining challenges to realizing practical few-mode fiber amplifiers are discussed, and future prospects for the few mode fiber amplifier are envisioned.

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More information

e-pub ahead of print date: 20 April 2018
Published date: 20 April 2018

Identifiers

Local EPrints ID: 421065
URI: http://eprints.soton.ac.uk/id/eprint/421065
PURE UUID: b56598a3-277b-42e7-a83b-6a8f425e38bf
ORCID for Yongmin Jung: ORCID iD orcid.org/0000-0002-9054-4372
ORCID for David J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 22 May 2018 16:30
Last modified: 10 Nov 2021 03:22

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Contributors

Author: Yongmin Jung ORCID iD
Author: Shaif-Ul Alam
Editor: G.D. Peng

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