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Optical Fibre Sensors - Chapter 8: Principles and Components

Optical Fibre Sensors - Chapter 8: Principles and Components
Optical Fibre Sensors - Chapter 8: Principles and Components
Optical fibres have some degree of sensitivity to a wide range of external parameters. On the other hand the effects are usually small and are minimised as far as possible in fibres designed for telecommunications. Furthermore it is often difficult to differentiate between a number of small responses which may occur simultaneously. Considerable advantages can be gained in sensor applications by appropriate selection of core and cladding materials and by novel fibre structures and designs.

Thus by spinning the preform during fibre drawing a high degree of circular birefringence can be introduced whilst the linear birefringence becomes negligible. Such fibres can behave as sensors of magnetic fields and electric currents. By introducing a high degree of linear birefringence fibre gyroscopes capable of measuring angular rotation become possible. The introduction of rare-earth materials into the core produces absorption bands with steep edges which have a strong wavelength sensitivity to changes in temperature. This produces the basis for distributed sensors which cover a wide range of temperatures.

A variety of novel types of optical fibres are presently being explored for potential application to sensors and transducers.
0-8900-6317-6
249-276
Artech House
Gambling, W.A.
70d15b3d-eaf7-44ed-9120-7ae47ba68324
Poole, S.B.
67918af2-6d57-43ab-bfdb-89f9a9a78afe
Dakin, J.P.
Culshaw, B.
Gambling, W.A.
70d15b3d-eaf7-44ed-9120-7ae47ba68324
Poole, S.B.
67918af2-6d57-43ab-bfdb-89f9a9a78afe
Dakin, J.P.
Culshaw, B.

Gambling, W.A. and Poole, S.B. (1989) Optical Fibre Sensors - Chapter 8: Principles and Components. In, Dakin, J.P. and Culshaw, B. (eds.) Optical Fibre Sensors. Artech House, pp. 249-276.

Record type: Book Section

Abstract

Optical fibres have some degree of sensitivity to a wide range of external parameters. On the other hand the effects are usually small and are minimised as far as possible in fibres designed for telecommunications. Furthermore it is often difficult to differentiate between a number of small responses which may occur simultaneously. Considerable advantages can be gained in sensor applications by appropriate selection of core and cladding materials and by novel fibre structures and designs.

Thus by spinning the preform during fibre drawing a high degree of circular birefringence can be introduced whilst the linear birefringence becomes negligible. Such fibres can behave as sensors of magnetic fields and electric currents. By introducing a high degree of linear birefringence fibre gyroscopes capable of measuring angular rotation become possible. The introduction of rare-earth materials into the core produces absorption bands with steep edges which have a strong wavelength sensitivity to changes in temperature. This produces the basis for distributed sensors which cover a wide range of temperatures.

A variety of novel types of optical fibres are presently being explored for potential application to sensors and transducers.

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Published date: 1989

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Local EPrints ID: 77568
URI: http://eprints.soton.ac.uk/id/eprint/77568
ISBN: 0-8900-6317-6
PURE UUID: 41d3ce26-cddd-46b3-8733-f75d0c104d85

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Date deposited: 11 Mar 2010
Last modified: 13 Mar 2024 23:55

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Contributors

Author: W.A. Gambling
Author: S.B. Poole
Editor: J.P. Dakin
Editor: B. Culshaw

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