作者：孙建美, 陈斐璐, 张越

作者单位：上海大学精密机械工程系，上海 200444

关键词：GRIN光纤探头;新型光纤气体传感器;空芯光子晶体光纤;耦合效率

摘要：

为研究集成化高性能的气体传感器，将超小GRIN光纤探头与空芯光子晶体光纤（HC-PCF）耦合，提供一种新型光纤气体传感器模型的设计方法。在解析新型光纤气体传感器模型的基础上，搭建实验测试系统，用GRIN光纤探头分别和单模光纤与HC-PCF耦合，进行接收光谱功率的比较分析。实验结果显示：在给定条件下，利用GRIN光纤探头的耦合系统可以获得67.73 nW的光谱功率，优于使用传统单模光纤接收到的53.52 nW。因此，利用GRIN光纤探头替代单模光纤与HC-PCF进行耦合并应用于光纤气体传感器中，具有更高的耦合效率和更高的输出光功率等优势，可用于新型光子晶体光纤气体传感器的研究。

A new gas sensor model based on ultra-small GRIN fiber probe
SUN Jianmei, CHEN Feilu, ZHANG Yue
Dept. of Precision Mechanical Engineering, Shanghai University, Shanghai 200444, China
Abstract: In order to study integrated high-performance gas sensor, the ultra-small GRIN fiber probe is coupled with hollow-core photonic crystal fiber (HC-PCF) to provide a new design method of the fiber optic gas sensor model. Based on the analysis of such new fiber gas sensor model, an experimental test system was built. The GRIN fiber probe was coupled with the single-model fiber (SMF) and HC-PCF respectively for comparative analysis of received spectral power. The experimental results show that under the given conditions, the coupling system using the GRIN fiber probe can obtain 67.73 nW of spectral power, which is better than 53.52 nW received using traditional single-mode fiber. Therefore, the use of GRIN fiber probes has the advantages of higher coupling efficiency and higher output optical power compared to SMF coupling with HC-PCF in fiber gas sensors, which can be further used in the research of new photonic crystal fiber gas sensors.
Keywords: GRIN fiber probe;new fiber gas sensor;hollow core photonic crystal fiber;coupling efficiency
2020, 46(12):28-32  收稿日期: 2020-05-12;收到修改稿日期: 2020-06-21
基金项目: 国家自然科学基金(61773249)
作者简介: 孙建美(1993-),女,山东潍坊市人,硕士,研究方向为智能内窥与光纤传感
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