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Characterisation of hollow-core photonic bandgap fibres and other multimode fibres for optical communications

Characterisation of hollow-core photonic bandgap fibres and other multimode fibres for optical communications
Characterisation of hollow-core photonic bandgap fibres and other multimode fibres for optical communications
Progress in multimode fibre technology has opened diverse opportunities in science and technology, one of which is pushing data capacities beyond the fundamental limits of conventional single-mode fibre, so as to avert network gridlock precipitated by exponentially growing global traffic demands. Hollow-core photonic bandgap fibres (HC-PBGFs), where light propagates in air rather than glass, have been considered as a potential candidate for high-capacity telecommunications applications, while offering superior performance over solid-core fibres in terms of low loss, low latency, and ultralow nonlinearity.

This thesis presents research conducted as part of the efforts of the EU FP7 project MODE-GAP to pioneer developments in HC-PBGF and related space-division multiplexing technologies. This work is involved with the characterisation of primarily HC-PBGFs and also solid-core multimode fibres, recently and respectively fabricated through the facilities of the Optoelectronics Research Centre and other project partners. A time-of-flight method is applied to make extensive measurements on these fibres to study their modal properties, including mode coupling and differential modal delay, in order to assess their capabilities for single-mode as well as mode-division multiplexed data transmission. In support of the fibre design process, this work has aided the full characterisation of the first ever fabricated 37-cell HC-PBGFs and enabled subsequent mode-division multiplexing trials at a record capacity of 73.7 Tbit/s. Characterisation of multi-kilometre record-length HC-PBGFs is also performed, and has supported the demonstration of these fibres in metro network environments.

To further understand the modal processes and facilitate fibre improvement, a simulation environment is constructed based on a power coupling propagation model. This has enhanced interpretations of experimental time-of-flight data, as well as validated a proposed theory relating mode coupling and loss in HC-PBGFs.

Finally, an experimental technique is introduced to inspect longitudinal defects in solid- and hollow-core fibres, by applying time-of-flight principles.
University of Southampton
Wong, Nicholas Heng Loong
f9721f60-e45a-4f2b-9803-023d012fc743
Wong, Nicholas Heng Loong
f9721f60-e45a-4f2b-9803-023d012fc743
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3

Wong, Nicholas Heng Loong (2017) Characterisation of hollow-core photonic bandgap fibres and other multimode fibres for optical communications. University of Southampton, Doctoral Thesis, 209pp.

Record type: Thesis (Doctoral)

Abstract

Progress in multimode fibre technology has opened diverse opportunities in science and technology, one of which is pushing data capacities beyond the fundamental limits of conventional single-mode fibre, so as to avert network gridlock precipitated by exponentially growing global traffic demands. Hollow-core photonic bandgap fibres (HC-PBGFs), where light propagates in air rather than glass, have been considered as a potential candidate for high-capacity telecommunications applications, while offering superior performance over solid-core fibres in terms of low loss, low latency, and ultralow nonlinearity.

This thesis presents research conducted as part of the efforts of the EU FP7 project MODE-GAP to pioneer developments in HC-PBGF and related space-division multiplexing technologies. This work is involved with the characterisation of primarily HC-PBGFs and also solid-core multimode fibres, recently and respectively fabricated through the facilities of the Optoelectronics Research Centre and other project partners. A time-of-flight method is applied to make extensive measurements on these fibres to study their modal properties, including mode coupling and differential modal delay, in order to assess their capabilities for single-mode as well as mode-division multiplexed data transmission. In support of the fibre design process, this work has aided the full characterisation of the first ever fabricated 37-cell HC-PBGFs and enabled subsequent mode-division multiplexing trials at a record capacity of 73.7 Tbit/s. Characterisation of multi-kilometre record-length HC-PBGFs is also performed, and has supported the demonstration of these fibres in metro network environments.

To further understand the modal processes and facilitate fibre improvement, a simulation environment is constructed based on a power coupling propagation model. This has enhanced interpretations of experimental time-of-flight data, as well as validated a proposed theory relating mode coupling and loss in HC-PBGFs.

Finally, an experimental technique is introduced to inspect longitudinal defects in solid- and hollow-core fibres, by applying time-of-flight principles.

Text
Final thesis - Version of Record
Available under License University of Southampton Thesis Licence.
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Published date: 27 June 2017

Identifiers

Local EPrints ID: 419655
URI: http://eprints.soton.ac.uk/id/eprint/419655
PURE UUID: 856df858-1e67-43df-95f1-9a759c5ef533
ORCID for Nicholas Heng Loong Wong: ORCID iD orcid.org/0000-0002-1743-3959
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 18 Apr 2018 16:32
Last modified: 14 Mar 2019 01:54

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