Fiber Fabry-Perot interferometer sensor for measuring resonances of piezoelectric elements

被引：1
作者：
da Silva, Ricardo E. [1 ]
Oliveira, Roberson A. [1 ]
Pohl, Alexandre A. P. [1 ]
机构：
[1] Univ Tecnol Fed Parana, 3165 Av Sete Setembro, BR-8023090 Curitiba, Parana, Brazil
来源：
21ST INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS | 2011年 / 7753卷
关键词：
Fabry-Perot interferometer; optical signal processing; piezoelectrics;
D O I：
10.1117/12.885858
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The development of a fiber extrinsic Fabry-Perot interferometer for measuring vibration amplitude and resonances of piezoelectric elements is reported. The signal demodulation method based on the use of an optical spectrum analyzer allows the measurement of displacements and resonances with high resolution. The technique consists basically in monitoring changes in the intensity or the wavelength of a single interferometric fringe at a point of high sensitivity in the sensor response curve. For sensor calibration, three signal processing techniques were employed. Vibration amplitude measurement with 0.84 nm/V sensitivity and the characterization of the piezo resonance is demonstrated.
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页数：4
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