光纤光栅对聚焦超声场检测的研究  

Research on the Detection of Focused Ultrasonic Field with Fiber Bragg Gratings

作　　者：田春华[1] 薛俭雷[1] 万永刚[1] 张立平[1] 梁明辉[1] 张淑丽[1] 

机构地区：[1]齐齐哈尔医学院

出　　处：《哈尔滨师范大学自然科学学报》2013年第2期35-37,共3页Natural Science Journal of Harbin Normal University

基　　金：黑龙江省教育厅科技研究项目资助(项目编号:12521640)

摘　　要：对聚焦超声场的声压特性进行了分析;利用传输矩阵法分析了切趾光纤光栅的反射谱;分析了超声波对光纤光栅作用会产生几何效应和弹光效应,引起谱线产生漂移,给出了参量的变化关系式;并通过实验测得无任何物理作用时的反射谱,不同频率超声波作用下谱线漂移曲线.证实了,超声波对光纤光栅作用会使中心波长产生漂移.Characteristic of the acoustic pressure of the focused ultrasonic field are analyzed. Transfer matrix method is used to analyze FBG the reflection spectrum of fiber bragg gratings. Ultrasonic effect on fiber Bragg grating will have a geometric effect and elastic - optic effect which caused the drift of reflection spectrum. Moreover, the parameter changes in the relationship are given. And the reflected spectra without any physical work are measured through the experiment. The reflection spectrum curves under the action of different frequency ultrasonic confirmed that the ultrasonic effect on fiber grating can make the center wavelength drift.

关 键 词：光纤光栅 超声波 聚焦超声场 

分 类 号：TN253[电子电信—物理电子学]