Optical fiber Fabry-Perot sensor based on BPQDs-PVA compound for humidity measurement

被引：4
作者：
Shao, Min [1 ]
Wang, Yanmei [1 ]
Liu, Bingkun [1 ]
Zhang, Wensong [2 ]
Lu, Qingqing [2 ]
机构：
[1] Xian Shiyou Univ, Sch Sci, Key Lab Photoelect Logging & Detecting Oil & Gas, Minist Educ, Xian 710065, Shanxi, Peoples R China
[2] Ltd Co Xian Heqi Photoelect Technol, Xian 710075, Peoples R China
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2024年 / 35卷 / 02期
关键词：
optical fiber humidity sensor; Fabry-Perot interferometer; black phosphorus quantum dots; polyvinyl alcohol; RELATIVE-HUMIDITY; FAST-RESPONSE; HUMAN BREATH;
D O I：
10.1088/1361-6501/ad087c
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A high-sensitivity fiber humidity sensor based on Fabry-Perot interferometer is experimentally proposed. The sensor is fabricated by coating black phosphorus quantum dots (BPQDs)-polyvinyl alcohol (PVA) film on the end face of single mode fiber via controllable dipping method. Benefit from the BPQDs-PVA based cavity, the length and the refractive index of the BPQDs-PVA compound changes with ambient humidity, evidently modulating the interference spectrum. Experimental results show that the sensor achieves a maximum humidity sensitivity of 4.844 nm/%RH in the humidity range of 33%-56%RH with a low temperature cross sensitivity of 0.017%RH degrees C-1. Meanwhile, stability test exhibits a low instability of 0.016%RH. Together with the advantages of simple manufacture, small size and fast response, the sensor has broad practical application prospect.
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页数：9
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