The University of Southampton
University of Southampton Institutional Repository

Behaviour of asymmetric fused-tapered single-mode fibre couplers

Behaviour of asymmetric fused-tapered single-mode fibre couplers
Behaviour of asymmetric fused-tapered single-mode fibre couplers
Fused-tapered single-mode fibre couplers are available which have a flattened wavelength response and which are therefore useful in applications requiring a near-constant power-splitting ratio over a range of wavelengths. They are made by inducing an asymmetry in the constituent fibres, for example by pre-tapering or pre-etching one or both fibres prior to coupler fabrication, or by using two dissimilar fibres. The maximum coupled power in these couplers has been shown to decrease with increasing asymmetry. Couplers made from dissimilar fibres could also be useful for integrating systems made from different fibres, and it may be necessary for such a coupler to exhibit complete power transfer despite the asymmetry in fibre type. Complete power transfer has only previously been shown to be possible in dissimilar fibre couplers by differentially etching the fibres used to make the coupler, in order to adjust the extent of cladding diameter asymmetry. It would be advantageous to be able to adjust the splitting ratio of these couplers without requiring close control over the cladding diameter asymmetry of the constituent fibres. We demonstrate that the maximum coupled power of an asymmetric coupler is strongly dependent on the degree-of-fusion in the coupler, and that it is possible to obtain near-total power transfer (or indeed any level of power transfer) for a given cladding diameter asymmetry by controlling the degree-of-fusion of the coupler. We therefore remove the requirement for a controllable differential etching process prior to coupler fabrication.
Birks, T.A.
65bb633e-6fa2-40f7-a1c6-748bb5ca2178
Hussey, C.D.
6360ed38-f77f-4bf2-bd9d-ee2460e0ba70
Birks, T.A.
65bb633e-6fa2-40f7-a1c6-748bb5ca2178
Hussey, C.D.
6360ed38-f77f-4bf2-bd9d-ee2460e0ba70

Birks, T.A. and Hussey, C.D. (1988) Behaviour of asymmetric fused-tapered single-mode fibre couplers. IEE Colloquium on All-Fibre Devices, London, United Kingdom. 03 Jun 1988. 4 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Fused-tapered single-mode fibre couplers are available which have a flattened wavelength response and which are therefore useful in applications requiring a near-constant power-splitting ratio over a range of wavelengths. They are made by inducing an asymmetry in the constituent fibres, for example by pre-tapering or pre-etching one or both fibres prior to coupler fabrication, or by using two dissimilar fibres. The maximum coupled power in these couplers has been shown to decrease with increasing asymmetry. Couplers made from dissimilar fibres could also be useful for integrating systems made from different fibres, and it may be necessary for such a coupler to exhibit complete power transfer despite the asymmetry in fibre type. Complete power transfer has only previously been shown to be possible in dissimilar fibre couplers by differentially etching the fibres used to make the coupler, in order to adjust the extent of cladding diameter asymmetry. It would be advantageous to be able to adjust the splitting ratio of these couplers without requiring close control over the cladding diameter asymmetry of the constituent fibres. We demonstrate that the maximum coupled power of an asymmetric coupler is strongly dependent on the degree-of-fusion in the coupler, and that it is possible to obtain near-total power transfer (or indeed any level of power transfer) for a given cladding diameter asymmetry by controlling the degree-of-fusion of the coupler. We therefore remove the requirement for a controllable differential etching process prior to coupler fabrication.

Text
350.pdf - Other
Download (222kB)

More information

Published date: June 1988
Venue - Dates: IEE Colloquium on All-Fibre Devices, London, United Kingdom, 1988-06-03 - 1988-06-03

Identifiers

Local EPrints ID: 77592
URI: https://eprints.soton.ac.uk/id/eprint/77592
PURE UUID: bae46159-edca-4dd9-ba57-1291db7abd87

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 11 Jan 2019 17:31

Export record

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.

×