FBG Hydrophone: Theory and Experiment

作     者：Wen-Tao Zhang Fang Li Yu-Liang Liu 

作者机构：Optoelectronic SystemLaboratory Institute of Semiconductors Chinese Academy of SciencesBeijing 100083 China 

出 版 物：《Journal of Electronic Science and Technology of China》 (中国电子科技（英文版）)

年 卷 期：2008年第6卷第4期

页      面：462-465页

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：supported by the National 863 Program under Grant No. 2007AA03Z415 

主　　题：Diaphragm fiber Bragg grating,hydrophone. 

摘      要：A fiber Bragg grating （FBG） hydrophone with enhanced sensitivity is demonstrated. A novel piston-like diaphragm with a hard core fixed at the center is used as the sensing element. Theoretical analysis shows that the Young＇s modulus of the diaphragm and the radius of the hard core have significant effect on the pressure sensitivity. Experiments are carried out to test this effect and the performance of the hydrophone. The static measure- ment result is in good agreement with the theoretical result and an acoustic sensitivity of 7 nm/MPa has been achieved.