光纤陀螺受辐照影响机理分析

构成光纤陀螺敏感器件的保偏光纤环在辐射环境中损耗会增加,陀螺的精度随之降低,从而限制了光纤陀螺在空间中的应用。采用60Co作为辐射源模拟空间辐射环境,对光纤陀螺及其光电器件进行了大量的试验,并对光纤陀螺及其光电器件受空间辐射影响的机理进行了研究,得出光纤陀螺光电器件中保偏光纤环受辐射影响最严重,从而重点分析了光纤陀螺敏感器件保偏光纤环的辐射影响机理,从原理上探讨了保偏光纤环在辐射条件下损耗的增加对光纤陀螺的影响,为光纤陀螺抗辐射加固技术提供了理论基础。

Mechamism of Radiation Effects on Fiber Optic Gyros

The polarization-maintaining fiber coil in a fiber optic gyro(FOG) is a sensitive element,its loss will increase when it works in radiation environment such as the spatial,and the performance of FOG also degracles.The spatial radiation enviroment is simulated with 60Co as the radiation source,and influences of spatial radiation on elements of fiber optic gyro especially the polarization-maintaining fiber,were researched based on lots of simulation experiments of spatial radiation.It is found the polarization-maintaining fiber suffers from the spatial radiation most seriously,and the radiation effect mechanism of polarization-maintaining fiber has been proposed.Furthermore,the radiation effect on fiber opti gyro owing to the increase of loss in polarization-maintaining fiber under radiation has been discussed,which provides theoretical foundation for radiation hardening design of fiber optic gyro.