Abstract Based on the primary electro-optic effect of lithium niobate crystal and combined with a polarizer and a Faraday rotator, a novel spatial non-reciprocal phase modulator design scheme suitable for Sagnac loop structure is proposed. On the one hand, this structure fundamentally eliminates the influence of eigenfrequency on the modulation mode of the system, and improves the sensitivity and accuracy of the system. On the other hand, experiments show that this phase modulator has good modulation characteristics and temperature stability. Applying this phase modulator to a fiber optic gyroscope (FOG), the experimental results are in good agreement with the theoretical analysis, which proves the correctness and feasibility of the structure. It provides new options for the use of phase modulators for test instrument such as fiber-optic gyroscopes and current transformers, and provides a way of thinking to promote the development of fiber-optic gyroscopes to high precision.

中文翻译：

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一种新型空间非互易相位调制器在光纤陀螺仪中的应用

摘要 基于铌酸锂晶体的初级电光效应，结合偏振器和法拉第旋转器，提出了一种适用于萨格纳克环结构的新型空间非互易相位调制器设计方案。一方面，这种结构从根本上消除了本征频率对系统调制方式的影响，提高了系统的灵敏度和精度。另一方面，实验表明该相位调制器具有良好的调制特性和温度稳定性。将该相位调制器应用于光纤陀螺仪（FOG），实验结果与理论分析吻合较好，证明了该结构的正确性和可行性。