U-shaped micro-groove fiber based on femtosecond laser processing for humidity sensing

被引：0
|
作者：
傅贵 [1 ]
马丽丽 [1 ]
苏富芳 [1 ]
史萌 [1 ]
机构：
[1] Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Qufu Normal University
来源：
Optoelectronics Letters | 2018年 / 14卷 / 03期
基金：
中国国家自然科学基金;
关键词：
PVA; U-shaped micro-groove fiber based on femtosecond laser processing for humidity sensing; GO;
D O I：
暂无
中图分类号：
TP212 [发送器（变换器）、传感器];
学科分类号：
080202 ;
摘要：
A novel optical fiber sensor with a U-shaped micro-groove structure ablated by femtosecond laser on single-mode fiber for measuring air relative humidity(RH)is reported in this paper.In order to improve the accuracy of sensor,a graphene oxide(GO)/polyvinyl alcohol(PVA)composite film is coated on the surface of micro-groove structure.In the U-shaped micro-groove structure,the remaining core and micro-cavity in the micro-groove make up two major optical propagation paths,forming a Mach-Zehnder interferometer(MZI).The sensor has a good linear response within the RH range of 30%—85%,and the maximum sensitivity can reach 0.638 1 nm/%RH.The effect of temperature on the overall performance of the humidity sensor is also investigated.As a new type of all-fiber device,the sensor shows excellent sensitivity and stability.
引用
收藏
页码：212 / 215
页数：4
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