Fiber optic interferometric sensor and method by adding controlled amounts of circular birefringence in the sensing fiber
Abstract
A fiber optic interferometric sensor (10, 70) includes a sensing fiber (32, 92) which forms a closed optical path around a current-carrying conductor (44, 94). The sensing fiber (32, 92) has a predetermined number of twists which causes a predetermined amount, T, of circular rotation of the polarization state of the light waves traveling on the optical path, thereby reducing a scale factor error introduced by linear birefringence in the sensing fiber.
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Citation
Blake, James N.; Short, Shayne X. (2000). Fiber optic interferometric sensor and method by adding controlled amounts of circular birefringence in the sensing fiber. United States. Patent and Trademark Office; Texas A&M University. Libraries. Available electronically from https : / /hdl .handle .net /1969 .1 /176633.