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Multimode Interference Refractive Index Sensor Based on Coreless Fiber 被引量:2

Multimode Interference Refractive Index Sensor Based on Coreless Fiber
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摘要 multimode 干扰折射索引(RI ) 传感器数字地并且试验性地基于无核心的纤维被表明。二相同单个模式纤维(SMF ) 在什么时候的能被看作微弱地与步索引侧面指导 multimode 纤维(MMF ) 的等价物的无核心的纤维的节的两结束被拼接包围折射索引(SRI ) 比无核心的纤维的低。因此,它成为常规单个模式的 multimode 单个模式(SMS ) 纤维结构但是与一种更大的核心尺寸。产量系列将由于无核心的纤维的直接暴露在 SRI 与变化一起变。在不同 SRI 下面的产量系列数字地被学习,以及有无核心的纤维的不同长度和直径的敏感。断言和计算与试验性的结果显示出好协议。证明由确认可行的建议 RI 传感器试验,并且相对错误仅仅是 0.1% 哪个占据了更好的察觉到的性能和有实行可能。 A multimode interference refractive index (KI) sensor based on the coreless fiber was numerically and experimentally demonstrated. Two identical single mode fibers (SMF) are spliced at both ends of a section of the coreless fiber which can he considered as the equivalent weakly guiding multimode fiber (MMF) with a step-index profile when the surrounding refractive index (SKI) is lower than that of the coreless fiber. Thus, it becomes the conventional single-mode multimode single-mode (SMS) fiber structure but with a larger core size. The output spectra will shift along with the changes in the SKI owing to the direct exposure of the coreless fiber. The output spectra under different SKIs were numerically studied, as well as the sensitivities with different lengths and diameters of the coreless fiber. The predication and calculation showed the good agreement with the experimental results. The proposed RI sensor proved to be feasible by verification experiments, and the relative error was merely 0.1% which occupied preferable sensing performance and practicability.
作者 Yang Li (1) Zhibo Liu (1) Shuisheng Jian (1) Yang LI, Zhibo LIU, and Shuisheng JIAN Institute of Lightwave Technology, Beijing Jiaotong University, Beifing, 100044, China
出处 《光子传感器:英文版》 EI 2014年第1期21-27,共7页 Photonic Sensors
关键词 折射率分布 空芯光纤 多模干涉 传感器 验证实验 纤维结构 单模式 数值模拟 Refractive index sensor, multimode interference, coreless fiber
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