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Variation of refractive-index profiles in single-mode fibre preforms measured using an improved high-resolution spatial-filtering technique

Variation of refractive-index profiles in single-mode fibre preforms measured using an improved high-resolution spatial-filtering technique
Variation of refractive-index profiles in single-mode fibre preforms measured using an improved high-resolution spatial-filtering technique
The non-destructive measurement of refractive-index profiles (RIP) in optical fibre preforms is of considerable importance to both preform fabrication and to fibre propagation assessment. Recently we have reported a technique based on spatial filtering which allows direct visualisation of the preform deflection function and reveals the RIP in considerable detail. The method has the advantage that it requires a minimum of equipment and is simple to apply. We report here a further development involving dynamic filtering which allows both enhanced performance and easier computer automation. The capability of the new equipment is demonstrated by using it to reveal the evolution of the RIP along the length of a single-mode fibre preform and. to predict at each point the wavelength region of monomode operation. It is shown that considerable variation can occur towards the ends of the preform and that this causes a shift of the cut-off wavelength. The method thus provides a powerful tool for preform diagnosis.
1586031872
140-143
IOS Publisher
Sasaki, I.
309a20ae-9f88-4c29-9b85-0c82ef37278b
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Mansfield, R.J.
410984a0-44c7-4a5a-8381-9733e4ef577f
Adams, M.J.
4a9df701-bc4d-492e-a54e-de6d526d3083
Sasaki, I.
309a20ae-9f88-4c29-9b85-0c82ef37278b
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Mansfield, R.J.
410984a0-44c7-4a5a-8381-9733e4ef577f
Adams, M.J.
4a9df701-bc4d-492e-a54e-de6d526d3083

Sasaki, I., Payne, D.N., Mansfield, R.J. and Adams, M.J. (1980) Variation of refractive-index profiles in single-mode fibre preforms measured using an improved high-resolution spatial-filtering technique. In 6th European Conference on Networks and Optical Communications. IOS Publisher. pp. 140-143 .

Record type: Conference or Workshop Item (Paper)

Abstract

The non-destructive measurement of refractive-index profiles (RIP) in optical fibre preforms is of considerable importance to both preform fabrication and to fibre propagation assessment. Recently we have reported a technique based on spatial filtering which allows direct visualisation of the preform deflection function and reveals the RIP in considerable detail. The method has the advantage that it requires a minimum of equipment and is simple to apply. We report here a further development involving dynamic filtering which allows both enhanced performance and easier computer automation. The capability of the new equipment is demonstrated by using it to reveal the evolution of the RIP along the length of a single-mode fibre preform and. to predict at each point the wavelength region of monomode operation. It is shown that considerable variation can occur towards the ends of the preform and that this causes a shift of the cut-off wavelength. The method thus provides a powerful tool for preform diagnosis.

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More information

Published date: 1980
Venue - Dates: 6th ECOC, United Kingdom, 1980-09-01 - 1980-09-01

Identifiers

Local EPrints ID: 77717
URI: http://eprints.soton.ac.uk/id/eprint/77717
ISBN: 1586031872
PURE UUID: fd326787-4534-41ea-9a6f-196131919512

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Date deposited: 11 Mar 2010
Last modified: 29 Nov 2018 17:32

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Contributors

Author: I. Sasaki
Author: D.N. Payne
Author: R.J. Mansfield
Author: M.J. Adams

University divisions

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