一种基于光纤萨尼亚克环的新型传感结构

A Novel Sensing Structure Based on Fiber Sagnac Loop

提出了一种实现全光纤多扰动测量的基于光纤萨尼亚克环的新型传感结构。该传感结构采用新型的双萨尼亚克环结构并用波分复用技术代替了传统的双光源结构 ,减小了系统损耗 ,实现了对多扰动的位置的测量。分析了传感原理 ,推导了数学模型 ,表明测量误差与解调电路的频率响应有关 ,并进行了单频和多频扰动的实验研究 ,实验证明了理论分析的正确性。

A novel sensing structure is proposed based on fiber Sagnac loop, and all fiber sensing for multi disturbance is realized. The sensing structure has the novel double Sagnac loop and WDM technology instead of traditional double light source, reducing the system error and realizing the measurement of multi disturbance. The analysis of sensing theory, deducing mathematical model and the simple and multi disturbance test are performed. The theory is proved experimently. Analysis indicates that the error is related to frequence response of demodulation circuit.