RESPONSE ANALYSIS OF DISTRIBUTED FEEDBACK FIBER LASER SENSOR IN HIGH-FREQUENCY ULTRASONIC FIELD

被引：0
|
作者：
Chen, Jia-yi [1 ,2 ]
Wu, Xian-mei [1 ,2 ]
Liu, Song [1 ,2 ]
Wang, Cong [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Acoust, State Key Lab Acoust, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
PROCEEDINGS OF THE 2019 13TH SYMPOSIUM ON PIEZOELECTRICITY, ACOUSTIC WAVES AND DEVICE APPLICATIONS (SPAWDA) | 2019年
基金：
中国国家自然科学基金;
关键词：
DFB laser fiber sensor; Optical fiber ultrasonic sensing; High-frequency ultrasonic; BRAGG GRATING SENSORS; DAMAGE DETECTION;
D O I：
10.1109/spawda.2019.8681808
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
The response of the distributed feedback (DFB) fiber laser sensor under ultrasonic excitation is represented by the change in the reflection spectrum. In this paper, we simulate the strain of the axial distribution of DFB by finite element method and calculate the reflection spectrum by transfer matrix method. The results show that under the action of high-frequency ultrasonic, the wavelength shift of DFB is small, and it is not sensitive to high-frequency ultrasonic waves. The peak with lower reflectivity in the spectrum is distorted.
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页数：6
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