Title :
Imperfect quarter-waveplate compensation in Sagnac interferometer-type current sensors
Author :
Short, Shayne X. ; Tselikov, Alexandr A. ; De Arruda, Josiel U. ; Blake, James N.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
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° 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
Keywords :
birefringence; compensation; electric current measurement; fibre optic sensors; light interferometers; optical elements; transducers; Sagnac interferometer-type current sensors; birefringence axes; electronic signal processing scheme; imperfect quarter-waveplate compensation; in-line Sagnac interferometer fiber-optic current sensors; in-line version; integrating imperfect quarter-waveplates; loop version; quarter-waveplates; relatively large imperfections; scale factor; scale factor errors; Birefringence; Current measurement; Gyroscopes; Optical fiber devices; Optical fiber polarization; Optical fiber sensors; Optical fibers; Sagnac interferometers; Stability; Temperature sensors;
Journal_Title :
Lightwave Technology, Journal of
