All-Fiber-Optic Sensor for Relative Humidity Measurement

摘要：

A novel relative humidity (RH) sensor based on single-mode-multimode-single-mode (SMS) fiber structure is presented. The sensors are created through coating a thin layer of polyvinyl alcohol (PVA) on the multimode fiber deleted the cladding trough HF solution cauterization as the sensitive cladding film, whose refractive index varies as a function of humidity level. Due to the SMS fiber structures sensitivity to ambient refractive index, the spectral properties of SMS fiber structure coated PVA sensitive film are modified under exposure to different ambient humidity levels ranging from 50％~ 89％RH. The related theoretical analysis and the numerical simulation of spectral transmission of SMS fiber structure with different surrounding refractive index are also proposed. The sensitive of the RH measurement of 0.18nm/％RH in the range from 80％-89％RH is experimentally achieved. The experimental results obtained are consistent with the conclusion obtained by numerical simulating.

关键词： relative humidity (RH) SMS fiber structure polyvinyl alcohol (PVA) coating optical fiber sensor

作者: Yu Zhao Yongxing Jin Houhui Liang Xinyong Dong Jianfeng Wang

作者单位: Institute of Optoelectronic Technology, China Jiliang University, Xueyuan Street, Hangzhou, 310018, China

会议类型: 国际会议

会议名称: 2011 International Conference on Electronics and Optoelectronics(2011电子学与光电子学国际会议 ICEOE 2011)

会议地点: 大连

会议语种:英文

页码: 83-86

在线出版日期: 2011-07-29（万方平台首次上网日期，不代表论文的发表时间）