Gyro sensor coil with filled optical fiber

G - Physics – 01 – C

Patent

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G01C 19/72 (2006.01)

Patent

CA 2236313

A sensor coil for a fiber optic gyroscope includes fiber with an inner jacket of predetermined composition for reducing the effects of temperature-change-induced optical length asymmetry upon bias stability. Filler material of predetermined composition is combined with silicone and deposited upon the glass fiber, forming an inner jacket. The composition of the inner jacket is adjusted to thereby effect the Poisson ratio of the inner jacket and thereby reduce the isotropic thermally-induced pressure within the wound coil resulting in reduced temperature-induced optical length asymmetry and improved bias stability.

Bobine de capteur destinée à un gyroscope à fibre optique comprenant une fibre dotée d'une enveloppe intérieure afin de réduire les effets de l'asymétrie de la longueur optique provoqués par des changements de température sur la stabilité de la polarisation. Une matière de remplissage de composition prédéterminée est combinée à du silicium et déposée sur la fibre de verre pour constituer l'enveloppe intérieure. La composition de l'enveloppe intérieure est réglée de façon à influer sur le nombre de Poisson de cette enveloppe et à réduire ainsi la pression isotropique causée par la chaleur à l'intérieur de la bobine enroulée, ce qui permet de diminuer l'asymétrie de la longueur optique provoquée par la température et d'améliorer la stabilité de la polarisation..

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