内凹阶梯型反射式光纤传感器探头的设计

摘要

设计了一种新型的内凹阶梯型反射式光纤传感器探头.基于出射端光场分布模型,建立输出调制特性的数学模型,结合影响传感器特性的主要参数,对两根接收光纤与发送光纤端面之间的错位量a、b进行了仿真计算和分析,得出了系统的优化设计参数.最后与平面型探头进行对比分析,该探头不仅具有良好的光学补偿作用,而且扩大了量程,提高了测量的灵敏度.%A new type of concave ladder optical fiber sensing probe was designed.A mathematical model of the output modu-lation function was established based on the output distribution model.Combined with the main parameters that affect the charac-teristics of the sensor,the misalignment amount a and b between the two receiving fiber and the transmitting fiber were simulated and analyzed,and the optimal design parameters of the system were obtained.Finally,compared with the planar probe,the new probe not only has a good optical compensation,but also expand the measurement range,improving the measurement sensitivity.