FBG Hydrophone: Theory and Experimen |
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基金项目: | This work was supported by the National 863 Program under Grant No. 2007AA03ZA 15. The authors also wish to thank Yuan-Hui Liu for his help with the experiment. |
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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.
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关 键 词: | 纤维布拉格光栅 光学应用 水听器 光板 |
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