Inherent temperature compensation of a dual-mode fiber voltage sensor with coherence-tuned interrogation

Author

Bohnert, K. ; Peyuignot, P.

Author_Institution

ABB Corp. Res. Center, Baden, Switzerland

Volume

16

Issue

4

fYear

1998

fDate

4/1/1998 12:00:00 AM

Firstpage

598

Lastpage

604

Abstract

We investigate the effects of temperature on a optical fiber voltage sensor. The sensor is based on the converse piezoelectric effect of quartz. The piezoelectric deformation of the cylinder-shaped transducer crystal induced by an applied at voltage is sensed by an elliptical-core dual-mode fiber. The resulting modulation of the differential phase of the LP₀₁ and even LP₁₁ modes of the fiber is remotely detected by coherence-tuned interrogation using a 780-nm multimode laser diode source. A second dual-mode fiber acts as a receiver interferometer. We determine the influence of temperature on the scale factor of the transducer and on the accuracy of the interferometric interrogation. We further show that the sensitivity to temperature of the group index difference of the sensor fiber modes can be exploited to temperature-correct the scale factor of the transducer

Keywords

compensation; fibre optic sensors; light coherence; measurement errors; sensitivity; transducers; tuning; voltage measurement; 780 nm; coherence-tuned interrogation; converse piezoelectric effect; cylinder-shaped transducer crystal; differential phase; dual-mode fiber; dual-mode fiber voltage sensor; elliptical-core dual-mode fiber; even LP₁₁ modes; group index difference; inherent temperature compensation; interferometric interrogation; measurement accuracy; nm multimode laser diode sourc; optical fiber voltage sensor; piezoelectric deformation; quartz; receiver interferometer; scale factor; sensitivity; sensor fiber modes; temperature-correct; transducer; Optical fiber sensors; Optical fibers; Optical interferometry; Optical receivers; Optical sensors; Phase modulation; Piezoelectric effect; Piezoelectric transducers; Temperature sensors; Voltage;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.664069

Filename

664069