基于超细径光纤的高精度光纤陀螺  

High precision fiber optic gyroscope based on ultra-thin fiber

作　　者：赵坤 赵小明[1] 左文龙[1] 颜苗[1] 罗文勇 刘伯晗[1] ZHAO Kun;ZHAO Xiaoming;ZUO Wenlong;YAN Miao;LUO Wenyong;LIU Bohan(Tianjing Navigation Instrument Research Institute,Tianjin 300131,China;Raygetec Co.,Ltd,Wuhan 430074,China)

机构地区：[1]天津航海仪器研究所,天津300131 [2]锐光信通科技有限公司,武汉430074

出　　处：《中国惯性技术学报》2022年第5期615-619,共5页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金(62105307);装备预研基金(50917010201)。

摘　　要：在应用系统的牵引及光学器件技术的推动下,工程化光纤陀螺朝着小型化、轻量化、高精度方向发展,设计了一种基于新型超细径(60/100)光纤制作的高精度光纤陀螺。相比于传统细径保偏光纤,新型超细径光纤可增加光纤的抗弯曲程度,也可使光纤环圈的绕制半径减少;同时,由于光纤变细,光纤环厚度减小,当环境温度改变时,内外层光纤温度差减小,有利于改善光纤陀螺环圈全温性能,提高光纤陀螺温度特性。首先研究了新型超细径光纤纤芯、包层结构设计,在此基础上为针对性提高涂覆胶体、绕环胶体材料的可靠性,建立了胶体材料性能随时间退化的模型;随后,基于上述新型光纤和小型化宽谱ASE光源,成功搭建了高精度光纤陀螺仪样机,陀螺整机尺寸为70 mm×70 mm×35 mm,陀螺测试零偏稳定性可达0.007°/h,可以满足陀螺小型化、轻量化、高精度需求。With the development of application system and the progress of optical device technology,engineered FOGs are developing towards miniaturization,lightweight and high-precision.A small high-precision FOG based on a new type of ultra-fine diameter(60/100)fiber is designed.Compared with the traditional thin diameter polarization maintaining fiber,the new ultra-thin diameter fiber can increase the bending resistance of the fiber and reduce the winding radius of the fiber coil.At the same time,due to the thinning of the fiber,the thickness of the fiber coil decreases.When the ambient temperature changes,the temperature difference between the inner and outer layers of the fiber decreases,which is conducive to improving the full temperature performance of the ring and the temperature characteristics of the FOG.Firstly,the core and cladding structure design of a new ultra-thin diameter fiber is designed.On this basis,the degradation model of colloidal materials with time is established in order to improve the reliability of coated and looped colloidal materials.Then,based on the new fiber and miniaturized broadband ASE light source,the miniaturized high-precision FOG is successfully built.The size of the FOG is 70 mm×70 mm×35 mm,bias stability could reach 0.007°/h,which can meet the requirements of miniaturization,lightweight and high precision of the gyroscope.

关 键 词：高精度光纤陀螺 超细径光纤 零偏稳定性 宽谱ASE光源 

分 类 号：U666.1[交通运输工程—船舶及航道工程]