摘要
针对高强度聚焦超声(HIFU)声场测量,提出并研究了一种基于Parylene膜的法-珀干涉型光纤水听器。采用真空气相沉积法在光纤的端面蒸镀Parylene膜构成光纤水听器的法-珀腔,分析了光纤水听器的传感原理和解调原理,建立了HIFU声场检测的实验系统。实验结果表明,基于Parylene膜的法-珀干涉型光纤水听器能准确传感超声信号,其输出与换能器驱动电压的非线性度小于0.01,且与聚偏氟乙烯(PVDF)针式水听器的测量结果基本一致。
A Fabry-Perot interferometric fiber-optic hydrophone formed by Parylene coating for measuring high intensity focused ultrasound （H1FU） is presented. The Fabry-Perot cavity of the fiber-optic hydrophone is formed by coating a Parylene film on the cleaved end of a single mode fiber by the vacuum vapor deposition method. The sensing principle and the demodulation principle of the Fabry-Perot interferometric fiber-optic hydrophone has been dis- cussed. An experiment system of HIFU acoustic field has been fabricated. The experimental results show that the proposed Fabry-Perot interferometric fiber-optic hydrophone can accurately sense the ultrasonic signals,the non-line- arity of the output voltage of the fiber-optic hydrophone relative to the voltage applied to the ultrasonic transducer is less than 0.01, and the results sensed by the developed Fabry^Perot interferometric fiber-optic hydrophone agree with those sensed by the PVDF needle hydrophone.
出处
《压电与声光》
CSCD
北大核心
2012年第3期355-358,共4页
Piezoelectrics & Acoustooptics
基金
重庆市科委自然科学重点基金项目(CSTC
2009BA5072)
作者简介
张洁（1985-），女（彝族），贵州毕节人，硕士，主要从事生物医学工程的研究。E—mail：zhangj6647@163．com。
通信作者：王代华，E-mail：dhwang@cqu．edu．cn。
