光纤环是光纤陀螺组成的核心部件，不同绕制方式绕成的光纤环性能差别很大，随时间变化的温度梯度会影响光纤环的瞬态特性。针对采用八级对称绕法绕制的高精度光纤环，分别通过理论分析和实验验证来研究其瞬态特性，建立高精度光纤环存在等效不对称度情况下的径向和轴向温度激励模型，分析其在两种温度激励下的热致非互易误差角度大小，采用智能桌面温箱和温度激励装置搭建实验平台，对两种热致非互易误差角度大小进行实验测试，根据测试结果及理论分析，可得到高精度光纤环的等效不对称度大小，分析光纤环瞬态特性，判断其绕制性能，对光纤环用于光纤陀螺具有指导意义。

The fiber coil is the core component of the fiber optic gyroscope. Different winding method directly reflects the performance of the gyro. The temperature gradient varies with time will affect the transient characteristics of the fiber coil. For high accuracy fiber coil with octupole-winding method, we first study the transient effects through theoretical analysis and experimental verification respectively. Radial and axial direction temperature excitation model is built with the exist of equivalent asymmetrical length of the high accuracy fiber coil. Then we analyze the thermal nonreciprocal error angle under two different temperature excitation conditions. Next, we experimentally test the thermal nonreciprocal error angle based on the built experimental platform. According to the test result and the theoretical analysis, we can get the equivalent asymmetrical length of the high accuracy fiber coil, analyze the transient effects of high accuracy fiber coil and judge the performance, which are useful for the application of the fiber coil using in fiber optic gyroscope.