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HIGH-PERFORMANCE PMD OPTICAL FIBER OPTIC INTERFEROMETER, HIGH-PMD OPTICAL FIBER OPTIC GYROSCOPE, AND INERTIAL NAVIGATION SYSTEM COMPRISING SUCH A GYROSCOPE
HIGH-PERFORMANCE PMD OPTICAL FIBER OPTIC INTERFEROMETER, HIGH-PMD OPTICAL FIBER OPTIC GYROSCOPE, AND INERTIAL NAVIGATION SYSTEM COMPRISING SUCH A GYROSCOPE
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机译：高性能PMD光纤干涉仪，高PMD光纤陀螺仪和包含此类陀螺仪的惯性导航系统
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摘要
The present invention relates to an optical fiber interferometer comprising a broadband optical source (1) having a decoherence time τ, a coil comprising N turns of an optical fiber (5) of length L, optical means capable of separating the beam incident in first and second beams respectively coupled to first and second ends of the fiber (5) so that the first beam travels the optical fiber in a first direction and the second beam travels the optical fiber in a direction. counter-propagative direction and a detector (6) able to detect the intensity of the output beam. According to the invention, the optical fiber is a high polarization mode optical fiber (PMD), the length L of the optical fiber coil is greater than twice the correlation length of the fiber, L 2.L so that the fiber operates in a coupled PMD regime and the propagation time difference (DGD) between two orthogonal polarization states accumulated on the length L of the fiber is greater than the decoherence time of the DGD source τ.
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