文献类型：期刊文献

英文题名：Adhesive-free bonding homogenous fused-silica Fabry-Perot optical fiber low pressure sensor in harsh environments by CO2 laser welding

作者：Wang Wenhua[1];Wu Weina[2];Wu Shengxu[3];Li Yongqiang[1];Huang Cunyou[1];Tian Xiuyun[1];Fei Xianxiang[1];Huang Jiang[1]

机构：[1]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Guangdong, Peoples R China;[2]Guangdong Ocean Univ, Sch Math & Comp Sci, Zhanjiang 524088, Guangdong, Peoples R China;[3]Guangdong Inst Anal, China Natl Analyt Ctr, Guangzhou 510070, Guangdong, Peoples R China

年份：2019

卷号：435

起止页码：97

外文期刊名：OPTICS COMMUNICATIONS

收录：SCI-EXPANDED(收录号：WOS:000454624400018)、、WOS

基金：This work was supported by the Science and Technology Planning of Guangdong Province, China (NO. 2015A030401094).

语种：英文

外文关键词：Optical fiber pressure sensor; Fabry-Perot interference; Adhesive-free bonding; Laser welding; Diaphragm

外文摘要：In this paper, we present a high-sensitivity homogenous fused-silica low pressure sensor. It was constructed from the commercially available standard silica fiber, fused-silica diaphragm and ferrule through CO2 laser all-welding. A Fabry-Perot (FP) cavity was fully sealed between the ultra-thin fused-silica diaphragm and the ferrule end face, and the ultra-thin diaphragm acts as a pressure transducer. We proposed the laser heat conduction welding for the fused-silica diaphragm, and the laser deep penetration point welding for the fiber and the ferrule. So the monolithic structure fused-silica FP interference optical fiber sensor was achieved. The sensor has a vent hole between the fiber and the ferrule forming during the laser deep penetration point welding, which can effectively reduce temperature dependence. The sensor exhibits excellent stability and repeatability, extreme low temperature dependence with 0.025nm/degrees C that is 1/76 of the theoretical value, a sensitivity of 5.15nm/kPa, and a resolution of 4.7Pa. With a monolithic fused-silica configuration, the adhesive-free bonding high-sensitivity fused-silica sensor is expected to be suitable for low pressure measurements in extreme harsh environments.