基于变分理论的单模光纤耦合器应变特性研究  

Study of Fiber-optic Coupler Strain Characteristic Based on Variational Theory

作　　者：马宾[1,2] 徐健[3] 隋青美[2] 

机构地区：[1]山东政法学院信息科学技术系,山东济南250014 [2]山东大学控制科学与工程学院,山东济南250061 [3]山东财政学院计算机信息工程学院,山东济南250013

出　　处：《仪表技术与传感器》2009年第7期69-71,110,共4页Instrument Technique and Sensor

基　　金：山东省自然科学基金(Z2006G06)

摘　　要：根据单模光纤耦合器的输出功率的比值对耦合区长度变化敏感的特点,仔细分析了熔融拉锥型光纤耦合器的应变特性。选用螺旋测微仪对光纤耦合器的应变特性进行研究,避免了悬臂梁结构自重、梁的振动等不可控因素对测量结果的影响,有效提高了测量精度。和电阻应变片的对比实验证明,熔融拉锥式单模光纤耦合器不但具有应力敏感性,而且随应变呈线性单调变化,同时具有较好的温度稳定性和横向抗干扰性。According to the characteristic of the ratio of single-mode fiber-optic coupler＇s output power is sensitive to the coupling zone＇s length change ; the strain characteristic of fused biconical taper was discussed in detail. The strain characteristic of the fiber-optic coupler was investigated with spiral micrometer in order to avoid the disturbance of cantilever self-weight and self-vibra- tion, the measurement precision was enhanced effectively. The experimental results comparision with resistance strain gauge indicate that the fused biconical taper coupler is sensitive to the strain, and the function changes monotone and linear. Meanwhile it has good temperature stability and antiisturber transversely.

关 键 词：熔融拉锥 单模光纤 耦合器 耦合比 变分理论 

分 类 号：TN253[电子电信—物理电子学]