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Proceedings Paper

Distributed optical fiber sensor for spatial location of polarization mode coupling
Author(s): Ilkan Cokgor; Vincent A. Handerek; Alan J. Rogers
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Paper Abstract

Transverse stress applied to a highly birefringent fiber at an arbitrary angle (other than 0 or 90 degrees) to the fiber birefringence axes causes rotation of the birefringence axes and changes the beat length of the fiber in that section. If one of the polarization modes is excited at the input, coupling of light from one mode to the other will be observed at a stress point. The presentation describes a method for determining the locations of discrete mode coupling points spaced along a polarization maintaining fiber using a pump-prob architecture based on the optical Kerr effect. Probe light experiences coupling at different stress locations. Counterpropagating strong pump light also experiences coupling while inducing additional birefringence, and changing the polarization state of the probe at the output. This system may be made temperature independent by introducing a phase tracking/triggering system. The advantages and limitations of this technique are described.

Paper Details

Date Published: 5 March 1993
PDF: 6 pages
Proc. SPIE 1797, Distributed and Multiplexed Fiber Optic Sensors II, (5 March 1993); doi: 10.1117/12.141296
Show Author Affiliations
Ilkan Cokgor, King's College London (United Kingdom)
Vincent A. Handerek, King's College London (United Kingdom)
Alan J. Rogers, King's College London (United Kingdom)


Published in SPIE Proceedings Vol. 1797:
Distributed and Multiplexed Fiber Optic Sensors II
John P. Dakin; Alan D. Kersey, Editor(s)

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