Optical power balancing in interferometric fiber optic...

Details Optical power balancing in interferometric fiber optic... Optical power balancing in interferometric fiber optic...

G - Physics

01

C

G01C 19/72 (2006.01)

Patent

CA 2221326

An interferometric fiber optic gyroscope having a wavelength-sensitive splitter which has a splitting ratio that changes according to light wavelength. A feedback circuit indicates any difference that there might be in the intensities of counterpropagating beams in the sensing loop of the gyroscope, and provides a signal to the light source to change the light wavelength in a direction to cause the splitter ratio to change so as to equalize the beams' intensities for eliminating the Kerr effect.

L'invention concerne un gyroscope à fibre optique interférométrique, à répartiteur sensible aux longueurs d'ondes, dont le rapport de répartition varie en fonction de la longueur des ondes lumineuses. Un circuit de retour indique toute éventuelle différence intervenant au niveau des intensités de faisceaux de contre-propagation dans la boucle de détection du gyroscope, et fournit un signal à la source lumineuse pour modifier la longueur des ondes lumineuses dans une direction, afin d'entraîner une modification du rapport de répartition, dans une mesure suffisante pour égaliser les intensités des faisceaux, de manière à éliminer l'effet Kerr.

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