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Propagation characteristics of optical fibres

Propagation characteristics of optical fibres
Propagation characteristics of optical fibres
A theoretical and experimental study has been made of propagation in multimode optical fibre. The fibre used in the experiments mainly consists of a capillary of ME1 glass filled with hexachlorobuta-1,3-diene. The main topics considered in this thesis are single-mode propagation and mode conversion effects due to bending, undulation and stress or strain. A measured pulse dispersion of less than 0.4ns/km has been achieved. A contributing factor is the high-loss cladding which results in a preferential mode filtering of higher-order modes so that the pulse dispersion for a beam of high launching angular width is reduced for a relatively small increase in attenuation. Pulse dispersion and mode conversion are not strong functions of bending and undulation of the fibre, but strongly depend on stress or strain.

The graded-index fibre has also been considered and its pulse dispersion is predicted to be half that of the pulse dispersion of the liquid-core fibre.
Matsumura, H.
1e8b76d6-6100-43c0-b411-6f9fe68671eb
Matsumura, H.
1e8b76d6-6100-43c0-b411-6f9fe68671eb
Gambling, W.A.
70d15b3d-eaf7-44ed-9120-7ae47ba68324

Matsumura, H. (1974) Propagation characteristics of optical fibres. University of Southampton, Department of Electronics, Doctoral Thesis, 167pp.

Record type: Thesis (Doctoral)

Abstract

A theoretical and experimental study has been made of propagation in multimode optical fibre. The fibre used in the experiments mainly consists of a capillary of ME1 glass filled with hexachlorobuta-1,3-diene. The main topics considered in this thesis are single-mode propagation and mode conversion effects due to bending, undulation and stress or strain. A measured pulse dispersion of less than 0.4ns/km has been achieved. A contributing factor is the high-loss cladding which results in a preferential mode filtering of higher-order modes so that the pulse dispersion for a beam of high launching angular width is reduced for a relatively small increase in attenuation. Pulse dispersion and mode conversion are not strong functions of bending and undulation of the fibre, but strongly depend on stress or strain.

The graded-index fibre has also been considered and its pulse dispersion is predicted to be half that of the pulse dispersion of the liquid-core fibre.

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More information

Published date: January 1974
Organisations: University of Southampton, Electronics & Computer Science

Identifiers

Local EPrints ID: 394752
URI: https://eprints.soton.ac.uk/id/eprint/394752
PURE UUID: 8cb25568-37c7-403b-9dc6-023eb0443435

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Date deposited: 29 Jun 2016 16:07
Last modified: 17 Jul 2017 18:57

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Contributors

Author: H. Matsumura
Thesis advisor: W.A. Gambling

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