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Angle Measurement by Geometric Polarisation Rotation in a Fibre Loop Reflector

  • D. A. Chapman
  • D. A. Gorham
  • G. Dickinson

Summary

A combination of bends and twists can rotate the state of polarisation of light in standard single mode optical fibre [1]. It has previously been proposed to use the effect to measure rotation angle [2], but there were practical difficulties due in part to the need for a linearly polarised optical input. By incorporating the rotator in a fibre loop reflector [3], an elegant angle sensor has now been designed which is independent of input polarisation state and which delivers the output as optical intensity. The paper describes the theory of operation and an experiment to verify the sensor design.

Keywords

Single Mode Fibre Polarisation Rotation Faraday Effect Passive Optical Network Linear Birefringence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J.N. Ross, The rotation of the polarisation in low birefringence monomode optical fibers due to geometric effects Optical & Quantum Electronics 16 pp 455–461 (1984)CrossRefGoogle Scholar
  2. 2.
    K. Itoh, T. Saitoh and Y. Ohtsuka, Optical rotation sensing by geometric effect of fiber-loop twisting J. Lightwave Technol. 5(7) (1987) pp 916–919CrossRefGoogle Scholar
  3. 3.
    D.B. Mortimore, Fiber Loop Reflectors J. LiAhtwave Technol. 6(7) pp 1217–1224 (1988)CrossRefGoogle Scholar
  4. 4.
    D.A. Chapman and D.W. Faulkner, Use of reflected light for low data rate upstream signalling in a single mode passive optical network, IEE Proc. Pt J 137(2) pp108–114 (1990)Google Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • D. A. Chapman
    • 1
  • D. A. Gorham
    • 1
  • G. Dickinson
    • 1
  1. 1.Faculty of TechnologyThe Open UniversityMilton KeynesUK

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