Experimental Analysis Of The Polarization Properties Of PMF Fusion In Fiber Optical Gyroscope

FOG (Fiber Optic Gyroscope) is an angular rate sensor based on the Sagnac effect. It has become a new mainstream instrumentation of the field of inertial technology, because of its high reliability, long life, start fast, large dynamic range and other advantages.In practical engineering applications, due to some restrictions on the performance of light sources, the light in fiber optic gyroscope transmission is not ideal but rather partially of polarized light. In the case of connecting two polarization maintaining fibers (PMF), their polarization maintaining characteristics affected by axial misalignments. This article describes in detail various expressions of the polarized light. A partially coherent theoretical analysis of partially polarized light through the polarization maintaining fiber fusion point with axial misalignments has been taken place. According to a simplified model of partially polarized light, analysis of the impact of the degree of polarization and extinction ratio using Jones vector theory when partially polarized light through the fusion point. Numerical simulation in variety situations has been carried out. Measure the degree of polarization, azimuth angle, extinction ratio and phase in laboratory, when partially polarized light through the polarization maintaining fiber fusion point with axial misalignment, and compare with numerical simulation results which can used for the later analysis of polarized light transmits through the fusion point of polarization maintaining fiber.