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对谐振式光纤陀螺中全保偏环形谐振腔及其定向耦合器进行了理论和实验研究，推导了谐振条件的解析表达式，并分析了谐振腔基本参数对谐振特性的影响。通过压电陶瓷对光纤谐振腔进行调制，记录输出特性曲线，得到了保偏环形谐振腔的谐振特性。最后给出了实验结果及测试曲线。并提出了在谐振系统中应加以解决的问题，为下一步系统的工作奠定了理论及实验基础。
The theoretical analysis and experimental study on fully preserved partial ring resonator and its directional coupler in resonant fiber gyroscope are presented. The analytic expression of resonance condition is deduced. The influence of fundamental parameters of resonant cavity on the resonance characteristics is also analyzed. The piezoelectric resonator is modulated by the piezoelectric ceramic, and the output characteristic curve is recorded to obtain the resonance characteristics of the polarization-maintaining ring resonator. Finally, the experimental results and test curves are given. And put forward the problem that should be solved in the resonant system, which laid the theoretical and experimental foundation for the next systematic work.