23 February 1989 Fiber Optic Sensor System Using Birefringent Filters For Spectral Encoding
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Proceedings Volume 1011, Fiber Optic Sensors III; (1989) https://doi.org/10.1117/12.949318
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany
A system of multimode fiber optic sensors is described for the remote measurement of position, angle, force, pressure and other measurands that can be converted into a rotation of polarization. A birefringent filter encodes the polarization angle into the power ratio of two interleaved comb spectra or, in a modified implementation, into the absolute spectral position of a comb spectrum. By using identical filters in all transducers and in the evaluation unit, transducers for the same or different measurands become interchange-able. All sensors are of the incremental type, with accuracies reaching 0.5 % of one period of the measurand, independent of variations in the attenuation of the fiber link of up to 20dB.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Friedhelm Dorsch, Friedhelm Dorsch, Reinhard Ulrich, Reinhard Ulrich, } "Fiber Optic Sensor System Using Birefringent Filters For Spectral Encoding", Proc. SPIE 1011, Fiber Optic Sensors III, (23 February 1989); doi: 10.1117/12.949318; https://doi.org/10.1117/12.949318

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