The University of Southampton
University of Southampton Institutional Repository

Optical fibre taper components

Optical fibre taper components
Optical fibre taper components
This thesis describes the fabrication, properties and analysis of some components made from tapered single-mode optical fibres. Its greater part is concerned with the study of directional couplers made by the taper technique, and the well-known properties of these important components are summarised.

An extensive investigation into the effects of twist on tapered couplers is described. Twist is found to change (‘tune’) the output splitting ratio of couplers, an effect which is examined experimentally. The practical application of twist-tuning as the basis of a freely tunable coupler, and also as an aid in the fabrication of standard fixed-ratio couplers, is considered. The effects of twist on couplers are analysed in detail, and a simple twist-tuning law is derived, tested and criticised.

The use of a pre-polish technique for the fabrication of asymmetric tapered couplers is described. The adjustment of the maximum splitting ratio of asymmetric couplers is demonstrated, a priori by control of the coupler's cross-sectional shape, and a posteriori by twist-tuning. Questions concerning the connection between waveguide adiabaticity and loss, raised by the successful implementation of asymmetric couplers, are considered.

The effects of birefringence on the performance of the fibre Sagnac reflector, which is made by joining together the two output fibres of a coupler, are examined experimentally and analysed using Jones calculus.

Miscellaneous studies concerning single-fibre tapers are also described. These consider the fabrication and properties of tapers with rectangular cross-sections, light propagation through tapered few-mode fibres, and the effects of a tapered section of fibre on the 'fibre fuse' thermal damage mechanism.
Birks, Timothy Adam
7ed29af2-9b54-4143-b5b3-00080a458cc9
Birks, Timothy Adam
7ed29af2-9b54-4143-b5b3-00080a458cc9
Hussey, C.D.
6360ed38-f77f-4bf2-bd9d-ee2460e0ba70

Birks, Timothy Adam (1990) Optical fibre taper components. University of Limerick (final award), Optoelectronics Research Centre, Southampton, Doctoral Thesis, 275pp.

Record type: Thesis (Doctoral)

Abstract

This thesis describes the fabrication, properties and analysis of some components made from tapered single-mode optical fibres. Its greater part is concerned with the study of directional couplers made by the taper technique, and the well-known properties of these important components are summarised.

An extensive investigation into the effects of twist on tapered couplers is described. Twist is found to change (‘tune’) the output splitting ratio of couplers, an effect which is examined experimentally. The practical application of twist-tuning as the basis of a freely tunable coupler, and also as an aid in the fabrication of standard fixed-ratio couplers, is considered. The effects of twist on couplers are analysed in detail, and a simple twist-tuning law is derived, tested and criticised.

The use of a pre-polish technique for the fabrication of asymmetric tapered couplers is described. The adjustment of the maximum splitting ratio of asymmetric couplers is demonstrated, a priori by control of the coupler's cross-sectional shape, and a posteriori by twist-tuning. Questions concerning the connection between waveguide adiabaticity and loss, raised by the successful implementation of asymmetric couplers, are considered.

The effects of birefringence on the performance of the fibre Sagnac reflector, which is made by joining together the two output fibres of a coupler, are examined experimentally and analysed using Jones calculus.

Miscellaneous studies concerning single-fibre tapers are also described. These consider the fabrication and properties of tapers with rectangular cross-sections, light propagation through tapered few-mode fibres, and the effects of a tapered section of fibre on the 'fibre fuse' thermal damage mechanism.

PDF
Birks_1990_thesis_1760T.pdf - Other
Restricted to Repository staff only

More information

Published date: May 1990
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 394670
URI: https://eprints.soton.ac.uk/id/eprint/394670
PURE UUID: 437179c4-5ed9-4f28-bc32-e5b9ffda55bf

Catalogue record

Date deposited: 22 Jun 2016 12:41
Last modified: 17 Jul 2017 18:58

Export record

Contributors

Author: Timothy Adam Birks
Thesis advisor: C.D. Hussey

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×