Imperfect quarter-waveplate compensation in Sagnac interferometer-type current sensors

We analyze scale factor errors associated with integrating imperfect quarter-waveplates into loop and in-line Sagnac interferometer fiber-optic current sensors. We show that relatively large imperfections in the quarter-waveplates can be tolerated in the loop version when the birefringence axes of t...

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Veröffentlicht in:	Journal of lightwave technology 1998-07, Vol.16 (7), p.1212-1219
Hauptverfasser:	Short, S.X., Tselikov, A.A., de Arruda, J.U., Blake, J.N.
Format:	Artikel
Sprache:	eng
Schlagworte:	Birefringence Current measurement Exact sciences and technology General equipment and techniques Gyroscopes Instruments, apparatus, components and techniques common to several branches of physics and astronomy Interferometers Optical fiber devices Optical fiber polarization Optical fiber sensors Optical fibers Optical instruments, equipment and techniques Physics Sagnac interferometers Sensors (chemical, optical, electrical, movement, gas, etc.) remote sensing Stability Temperature sensors Transducers
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Beschreibung
Zusammenfassung:	We analyze scale factor errors associated with integrating imperfect quarter-waveplates into loop and in-line Sagnac interferometer fiber-optic current sensors. We show that relatively large imperfections in the quarter-waveplates can be tolerated in the loop version when the birefringence axes of the two quarter-waveplates are oriented 45/spl deg/ with respect to each other. For the in-line version, we demonstrate an electronic signal processing scheme that desensitizes the scale factor to imperfections in the quarter-waveplate.
ISSN:	0733-8724 1558-2213
DOI:	10.1109/50.701399