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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 16,
  • Issue 8,
  • pp. 1404-
  • (1998)

Polarization Effects in the Sagnac-Michelson Distributed Disturbance Location Sensor

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Abstract

An analysis, based on Jones calculus, is presented of polarization effects in the merged Sagnac-Michelson interferometric sensor for distributed disturbance detection. The nature of birefringence biasing in the Sagnac interferometer is clarified: the cosine-response of the Sagnac interferometer can be biased to a sine-response by introducing birefringence with retardation equal to \pi/2 in the Sagnac-loop. In addition, the input light should be linearly polarized and both the direction of polarization and the optical axes of the birefringence region should be oriented at \pi/4 with respect to the plane of the fiber-loop.

© 1998 IEEE

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