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US 5,848,213 AGranted
Low shupe bias fiber optic rotation sensor coil
AssigneeLitton Systems, Inc.
InventorJohn P. Rahn
Life of this patent
Estimating the term…
Abstract
A fiber optic ribbon is used for forming a sensing coil that may be used in a Sagnac effect fiber optic rotation sensor. The fiber optic ribbon provides a single radial layer per turn of the coil winder and can be made to have a quadrupole spatial turn distribution.
Claims5
A method for forming sensing coil of optical fiber for a fiber optic rotation sensor, comprising the steps of:
- arranging a plurality of optical fibers 1, 2, . . . N to be parallel to one another in a planar array;
- encasing the plurality of the optical fibers in a flexible material to retain them in parallel relationship to one another to form a ribbon of the optical fibers having a pair of ribbon ends;
- and
- rolling the ribbon into a spiral;
- bringing the ends of the ribbon into contact;
- forming butt splices between selected fiber ends to form an optical fiber coil having a clockwise input lead and a counterclockwise input lead.
3 more elements
A fiber optic coil, comprising:
- a plurality of optical fibers 1, 2, . . . N arranged to be parallel to one another in a planar array;
- a flexible material formed to encase the plurality of the optical fibers to retain them in parallel relationship to one another to form a ribbon of the optical fibers having a pair of ribbon ends;
- and
- a spiral formed in the ribbon of optical fibers;
- and
- a plurality of butt splices formed between ends of selected fiber in the fiber ribbon to form an optical fiber coil having a clockwise input lead and a counterclockwise input lead.
3 more elements
Dependencies are inferred from the claim text.