材料科学
套圈
光纤布拉格光栅
压力传感器
光纤
激光器
焊接
激光束焊接
温度测量
光纤传感器
干涉测量
光纤激光器
光电子学
复合材料
光学
纤维
机械工程
波长
物理
工程类
量子力学
作者
Wenhua Wang,Xin Zhou,Wei-Na Wu,Jihua Chen,Shenlong He,Weifeng Guo,Junbin Gao,Shaoxin Huang,Xuanhua Chen
出处
期刊:Materials
[MDPI AG]
日期:2019-02-13
卷期号:12 (4): 552-552
被引量:8
摘要
In this paper, an optical fiber pressure sensor cascading a diaphragm-assisted Fabry-Perot interferometer (FPI) and a fiber Bragg grating (FBG) is proposed and demonstrated. The sensor comprises an optical fiber, a fused-silica ferrule, and a fused-silica diaphragm. We use a femtosecond laser firstly to fabricate a pit on the end face of the ferrule and then investigate the laser heat conduction welding and deep penetration welding technology for manufacturing the seepage pressure sensor of the all-fused-silica material. We develop a sensor based on a monolithic structured FPI without adhesive bonding by means of all-laser-welding. The pressure characteristics of the sensor have good linearity at different temperatures. Also, the monolithic structured sensor possesses excellent resolution, hysteresis, and long-term stability. The environmental temperature obtained by the FBG is employed to compensate for the difference in seepage pressure at different temperatures, and the difference in seepage pressure responses at different temperatures is shown to be very small after temperature compensation.
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