光学学报, 2010, 30 (6): 1608, 网络出版: 2010-06-07
基于环形反射面的全光纤法珀干涉式折射率传感器
All-Fiber Fabry-Pérot Interferometer Refractive Index Sensor Formed by Ring Reflector
光纤传感 法布里珀罗(法珀)干涉仪 环形反射面 折射率 optical fiber sensors Fabry-Pérot interferometer ring reflector refractive index
摘要
通过在单模光纤后依次熔接一段大芯径空芯光纤和一段小芯径空芯光纤,制作了一种由小芯径空芯光纤形成环形反射面的全光纤法珀腔。由于这种环形反射面结构的中间通孔适合气体或低粘度液体进出,因此可将其应用于气体或低粘度液体的折射率测量。分析了这种结构形成光纤法珀腔的机理,并实验研究了这种基于环形反射面的干涉式折射率传感器,得到了这种传感器用于折射率测量时的分辨率约为1.652×10-6。可以预见这种具有环形反射面的法珀干涉式折射率传感器在有毒、易燃、易爆的气体以及低粘度液体的折射率或含量检测中具有极大的潜在应用价值。
Abstract
All-fiber Fabry-Pérot based on ring reflector structure is fabricated by orderly splicing two section of hollow fibers with different core diameters to the light induced single-mode fiber. As the small hole in the ring surface is easy for gas or liquid in and out the cavity,it is useful in detecting the refractive index of gas and liquid. The forming theory of the fiber optic Fabry-Pérot cavity is analyzed,and the refractive index sensor base on ring reflector is studied by experiments. A resolution of the refractive index 1.652×10-6 is obtained in a measuring refractive index experiment. It can be anticipated that the Fabry-Pérot refractive index sensors with ring reflector will have important applications in the fields of the toxic,flammable,explosive gases and low viscosity liquid refractive index or content detection.
柯涛, 朱涛, 饶云江, 段德稳, 徐敏. 基于环形反射面的全光纤法珀干涉式折射率传感器[J]. 光学学报, 2010, 30(6): 1608. Ke Tao, Zhu Tao, Rao Yunjiang, Duan Dewen, Xu Min. All-Fiber Fabry-Pérot Interferometer Refractive Index Sensor Formed by Ring Reflector[J]. Acta Optica Sinica, 2010, 30(6): 1608.