Fiber optic interferometric sensor and method by adding controll

Optics: measuring and testing – By particle light scattering – With photocell detection

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25022727, G01B 902

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active

060233311

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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