Fibre Optic Two Polarization Interferometer With Unambiguous Digital Readout And Its Application As Remote Strain Sensor

Norbert Furstenau

doi:10.1117/12.963610

6 October 1986 Fibre Optic Two Polarization Interferometer With Unambiguous Digital Readout And Its Application As Remote Strain Sensor

Norbert Furstenau

Author Affiliations +

Proceedings Volume 0630, Fibre Optics '86; (1986) https://doi.org/10.1117/12.963610
Event: Sira/Fibre Optics '86, 1986, London, United Kingdom

Abstract

For overcoming the ambiguity of fringe counting in fibre optic interferometers with remote readout two phase shifted (π/2) interference signals are produced employing the residual birefringence of non-ideal monomode fibres. A simple logic circuit determines the sign of the measurand change corresponding to the sign of the phase shift and feeds the counting pulses into an up-down counter. The method is tested by strain measurements with jacketed as well as bare sections of fibre employing a Mach-Zehnder setup.

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Norbert Furstenau "Fibre Optic Two Polarization Interferometer With Unambiguous Digital Readout And Its Application As Remote Strain Sensor", Proc. SPIE 0630, Fibre Optics '86, (6 October 1986); https://doi.org/10.1117/12.963610

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