A sensitive intensity modulation differential optical fiber angular displacement sensor has been developed. The influence of the distance between the end face of the emitting fiber and the reflecting surface, the tilt angle of receiving optical fiber and the surface reflectivity on the performance of the sensor was analyzed. The optimal geometric parameters of the sensor structure were obtained based on the simulation results and the response of the sensor to different angular displacement was investigated. The experimental results show the sensor has large linear range for micro angular displacement detection and the sensitivity can reach to 0.0377 V/° and 0.08104 V/° for positive and negative angle detection respectively.

中文翻译：

---

强度调制差分光纤角位移传感器的理论与实验研究

已经开发了灵敏的强度调制差分光纤角位移传感器。分析了发射光纤端面与反射表面之间的距离，接收光纤的倾斜角度和表面反射率对传感器性能的影响。根据仿真结果获得了传感器结构的最佳几何参数，并研究了传感器对不同角度位移的响应。实验结果表明，该传感器在微角度位移检测中具有较大的线性范围，正负检测灵敏度分别达到0.0377 V /°和0.08104 V /°。