基于多芯光纤复用技术的光纤陀螺方案  

Design scheme of fiber optic gyroscope based on multi-core fiber multiplexing technology

作　　者：杨晟旻 徐宏杰[1] 孙胜琳 梁佳辉 YANG Shengmin;XU Hongjie;SUN Shenglin;LIANG Jiahui(School of Instrumentation Science and Opto-electronics Engineering,Beijing University of Aeronautics&Astronautics(BUAA),Beijing 100191,China)

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191

出　　处：《中国惯性技术学报》2022年第5期626-630,共5页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金(61935002)。

摘　　要：针对目前高精度光纤陀螺小型化的需求,于国内首次提出基于多芯光纤的纤陀螺光纤环复用光纤陀螺方案。通过特殊的耦合方式,使光在多芯光纤中的往返传输,可增加光纤环的有效长度,从而在不增加光纤环尺寸的情况下提高光纤陀螺的测量精度。首先设计了光路方案,对光耦合方式及偏振噪声抑制进行了分析。然后,以六芯光纤为例,提出了一种用于0.001°/h级别光纤陀螺的实用光路方案,经理论推导可知,相同尺寸下,基于多芯光纤复用的陀螺较普通光纤陀螺,理论精度可提升6倍,所以光纤陀螺中使用多芯光纤环可以实现高精度光纤陀螺的小型化。In response to the current miniaturization needs of high-precision fiber-optic gyroscopes,the fiber optic coil multiplexing technology for fiber optic gyroscopes based on multi-core optical fibers was proposed for the first time in China.Through the special coupling method,the round-trip transmission of light in the multi-core optical fiber can increase the effective length of the fiber coil,thereby improving the measurement accuracy of the fiber-optic gyroscope without increasing the size of the fiber coil.Firstly,the optical path scheme is designed,and the optical coupling mode and polarization noise suppression are analyzed.Then,taking six-core optical fiber as an example,a practical optical path scheme for 0.001°/h level fiber-optic gyroscope is proposed.It can be known from theoretical derivation that,under the same size,the gyroscope based on multi-core fiber multiplexing is more efficient than ordinary fiber optic gyroscope.The accuracy can be increased by 6 times,so the use of multi-core fiber optic coil in fiber optic gyroscopes can realize the miniaturization of high-precision fiber optic gyroscopes.

关 键 词：光纤陀螺 多芯光纤 Lyot消偏器 光纤环复用 

分 类 号：TH741[机械工程—光学工程]