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Curvature and microbending losses in single-mode optical fibres

Curvature and microbending losses in single-mode optical fibres
Curvature and microbending losses in single-mode optical fibres
Curvature of a single-mode optical fibre gives rise to two principal forms of additional transmission loss, namely transition loss and pure bend loss. The transition loss and the associated ray radiation, which have been observed at the beginning of a bend, can be satisfactorily explained by a modified coupled mode theory. The radiation modes are represented by a quasi-guided mode having an average propagation constant βe. The introduction of a gradual change of curvature reduces the transition loss much more than the pure bend loss. Analysis of the microbending loss shows that the transition component is a maximum at a given correlation length which can be simply expressed in terms of βe. The contributions of both transition and bend components to the total microbend loss have been derived for the case of a randomly-curved fibre for several autocorrelation and density functions.
0306-8919
43-59
Gambling, W.A.
70d15b3d-eaf7-44ed-9120-7ae47ba68324
Matsumura, H.
1e8b76d6-6100-43c0-b411-6f9fe68671eb
Ragdale, C.M.
fd1dac1c-ae44-4f32-8d55-366799ddef3c
Gambling, W.A.
70d15b3d-eaf7-44ed-9120-7ae47ba68324
Matsumura, H.
1e8b76d6-6100-43c0-b411-6f9fe68671eb
Ragdale, C.M.
fd1dac1c-ae44-4f32-8d55-366799ddef3c

Gambling, W.A., Matsumura, H. and Ragdale, C.M. (1979) Curvature and microbending losses in single-mode optical fibres. Optical and Quantum Electronics, 11 (1), 43-59. (doi:10.1007/BF00624057).

Record type: Article

Abstract

Curvature of a single-mode optical fibre gives rise to two principal forms of additional transmission loss, namely transition loss and pure bend loss. The transition loss and the associated ray radiation, which have been observed at the beginning of a bend, can be satisfactorily explained by a modified coupled mode theory. The radiation modes are represented by a quasi-guided mode having an average propagation constant βe. The introduction of a gradual change of curvature reduces the transition loss much more than the pure bend loss. Analysis of the microbending loss shows that the transition component is a maximum at a given correlation length which can be simply expressed in terms of βe. The contributions of both transition and bend components to the total microbend loss have been derived for the case of a randomly-curved fibre for several autocorrelation and density functions.

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Published date: January 1979

Identifiers

Local EPrints ID: 78703
URI: http://eprints.soton.ac.uk/id/eprint/78703
ISSN: 0306-8919
PURE UUID: 5ae61e3b-4865-4c45-9cee-bf862b765004

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Date deposited: 11 Mar 2010
Last modified: 14 Mar 2024 00:20

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Contributors

Author: W.A. Gambling
Author: H. Matsumura
Author: C.M. Ragdale

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