Fiber optic winding

Details Fiber optic winding Fiber optic winding

G - Physics

01

C

G01C 19/72 (2006.01) G02B 6/44 (2006.01)

Patent

CA 2114032

In an optical fiber coil arrangement for use in rotation sensors, for example, errors resulting from axial and/or radial time varying temperature gradients can be minimized ar substantially eliminated by employing reverse quadrupoles for the sensor coil. One of the quadrupoles is wound in a + - - + winding configuration. However, the next adjacent quadrupole is wound in a - + + - winding configuration. This reverse quadrupole arrangement substantially eliminates radial time varying temperature gra- dient dependent errors and reduces axial time varying temperature gradient dependent errors. The axial time varying temperature gradient dependent errors can be substantially eliminated by winding a reverse octupole arrangement. Accordingly, a reverse oc- tupole arrangement is wound with a + - - + - + + - - + + - + - - + winding configuration. Alternatively, the axial time vary- ing temperature gradient dependent errors can be substantially eliminated by providing extra lengths of the "+" and "-" ends which are axially displaced so as to substantially eliminate this axial time varying temperature gradient dependent error.

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