Dataset for OTDR-Integrated D-shaped Optical Fiber Sensor for Refractive Index Detection

We demonstrated an Optical Time Domain Reflectometer-based refractive index (RI) sensor for RI detection. A bare fiber and a D-shaped fiber structure were utilized as a sensing probe. Both probes were connected to an OTDR via a single-mode fiber before the probe was immersed in a solution with different RIs. Results show a bare fiber owns a sensing sensitivity of 17.226 dB/RIU, while a D-shaped fiber has a sensitivity of 12.835 dB/RIU. The D-shaped fiber probe has a higher linearity of 0.9985 compared to 0.9341 for bare fiber, indicating the D-shaped fiber is more reliable for RI detection.

本研究演示了一款基于光时域反射仪（Optical Time Domain Reflectometer，OTDR）的折射率（refractive index，RI）传感器，用于折射率检测。实验采用裸光纤与D型光纤结构作为传感探针，两类探针均通过单模光纤连接至光时域反射仪，随后将探针浸没于不同折射率的溶液中。测试结果显示，裸光纤传感器的传感灵敏度可达17.226 dB/RIU，而D型光纤传感器的灵敏度为12.835 dB/RIU。D型光纤探针的线性度达0.9985，高于裸光纤的0.9341，表明D型光纤更适用于可靠的折射率检测。