Stabilised current sensor using Sagnac interferometer
- 1 August 1988
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 21 (8) , 791-796
- https://doi.org/10.1088/0022-3735/21/8/010
Abstract
A current sensor based on a stabilised fibre-optic Sagnac interferometer has been constructed and preliminary tests have been carried out. Measurements made with this system are independent of variations in the following parameters: laser intensity, light intensity injected into the optical fibre and birefringence within the fibre. The stabilised output is obtained by electronically combining the output signal from the interferometer with samples of the signal which have traversed the optical fibre in opposite directions. The mathematical basis for the stabilisation technique and construction details for the instrument are given.Keywords
This publication has 9 references indexed in Scilit:
- Development of a magneto-optic current sensor for high, pulsed currentsReview of Scientific Instruments, 1986
- Origins and control of polarization effects in single-mode fibersJournal of Lightwave Technology, 1983
- Optical fibres for current measurement applicationsOptics & Laser Technology, 1980
- Polarization optics of twisted single-mode fibersApplied Optics, 1979
- Fiber-ring interferometer: polarization analysisOptics Letters, 1979
- Polarization and magnetooptic properties of single-mode optical fiberApplied Optics, 1978
- Representation of codirectional coupled wavesOptics Letters, 1977
- Coupled-Mode Theory for Anisotropic Optical WaveguidesBell System Technical Journal, 1975
- Network theory without circuit elementsProceedings of the IEEE, 1967