Guangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
State Key Laboratory of Cognitive Neuroscience and Learning, Center for Cognition and Neuroergonomics, Beijing Normal University at Zhuhai, Zhuhai 519087, China.
Sensors (Basel). 2021 Dec 23;22(1):81. doi: 10.3390/s22010081.
The simple and highly sensitive measurement of the refractive index (RI) of liquids is critical for designing the optical instruments and important in biochemical sensing applications. Intensity modulation-based polymer optical fiber (POF) RI sensors have a lot of advantages including low cost, easy fabrication and operation, good flexibility, and working in the visible wavelength. In this review, recent developments of the intensity modulation POF-based RI sensors are summarized. The materials of the POF and the working principle of intensity modulation are introduced briefly. Moreover, the RI sensing performance of POF sensors with different structures including tapered, bent, and side-polished structures, among others, are presented in detail. Finally, the sensing performance for different structures of POF-based RI sensors are compared and discussed.
液体折射率(RI)的简单、高灵敏度测量对于设计光学仪器至关重要,在生化传感应用中也非常重要。基于强度调制的聚合物光纤(POF)RI 传感器具有许多优点,包括低成本、易于制造和操作、良好的灵活性以及在可见光波长下工作。本综述总结了基于强度调制的 POF RI 传感器的最新发展。简要介绍了 POF 的材料和强度调制的工作原理。此外,详细介绍了具有不同结构的 POF 传感器(包括锥形、弯曲和侧面抛光结构等)的 RI 传感性能。最后,比较和讨论了基于 POF 的 RI 传感器不同结构的传感性能。