Optical fiber birefringence compensation mirror and a current sensor

摘要

As well as easy to alignment assembly, to improve the vibration resistance of the current sensor by compensating the birefringence generated in the sensor optical fiber in the current sensor in particular, and the fiber birefringence to allow large current detection by the current sensor I will provide compensation mirror. I also provide a current sensor resistance to vibration is improved by the optical fiber birefringence compensation mirror is optically connected. Optical fiber, birefringent element, lens, magnet, Faraday rotator, and I make up a mirror, an optical fiber birefringence compensation mirror. From the optical input and output end face of the optical fiber, as well as arranged in the order of the mirror birefringent element, and Faraday rotator, and a single-mode optical fiber. The incident light from the optical fiber, is separated into two linearly polarized light beams in the birefringent element, rotate 45 degrees the polarization plane of linearly polarized light of two Faraday rotator, and reflected in point symmetry at a point linearly polarized light of two mirror and then, it is rotated 45 degrees to the polarization plane in the Faraday rotator further, re-combined into one optical birefringent element, and is incident on the optical fiber.