Accurate Measurement Of The Voltage-Microdisplacement Correlation Of Piezoelectric Sensor With A Fiber Optic Interferometer

Dong Tai-Huo; Pao Cheng-Kang; Lin Dan

doi:10.1117/12.941125

14 October 1987 Accurate Measurement Of The Voltage-Microdisplacement Correlation Of Piezoelectric Sensor With A Fiber Optic Interferometer

Dong Tai-Huo, Pao Cheng-Kang, Lin Dan

Author Affiliations +

Proceedings Volume 0798, Fiber Optic Sensors II; (1987) https://doi.org/10.1117/12.941125
Event: Fourth International Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, The Hague, Netherlands

Abstract

A novel method for measuring the voltage-microdisplacement correlation of a piezoelectric sensor has been devised. It is based on the multi-mode fiber-optic interferometry and the variation in the resonant frequency dv which can be affected by changing the cavity length of a laser with a piezoelectric sensor. Then the linearity of the PZT can be measured with a ultra-precision by counting the interfe.rometric fringes shifted. The experimental results have shown that this device permits to detecting the displacement of PZT as small as λ/240 when using a fiber 20m in length. The potential of fiber interferometry in measuring the ultra-microdisplacement is also discussed.

Citation Download Citation

Dong Tai-Huo, Pao Cheng-Kang, and Lin Dan "Accurate Measurement Of The Voltage-Microdisplacement Correlation Of Piezoelectric Sensor With A Fiber Optic Interferometer", Proc. SPIE 0798, Fiber Optic Sensors II, (14 October 1987); https://doi.org/10.1117/12.941125

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