Multibeam laser heterodyne measurement with ultraprecision for electrostriction coefficient based on an oscillating mirror modulation  

作　　者：李彦超 高扬 冉玲苓 丁群 王春晖 孙剑锋 

机构地区：[1]College of Electronic Engineering, HeiLongJiang University, Heilongjiang, Harbin 150080, China [2]National Key Laboratozy of Tunable Laser Technology, Harbin Institute of Technology Harbin 150001, China

出　　处：《Chinese Optics Letters》2014年第A01期9-14,共6页中国光学快报（英文版）

摘　　要：This paper proposes a novel method of multibeam laser heterodyne measurement for an electrostriction coefficient. Based on the Doppler effect and heterodyne technology, loaded with the information of length variation to the frequency difference of the multibeam laser heterodyne signal by the frequency modulation of the oscillating mirror, this method can obtain many values of length variation caused by different voltages after the multibeam laser heterodyne signal demodulation simultaneously. Processing these values by a weighted- average method, it can obtain length variation accurately, and eventually obtain value of electrostriction coefficient of metal by the calculation. This novel method is used to simulate measurement for electrostriction coefficient of PZT under different voltages by MATLAB, and the obtained result shows that the relative measurement error of this method is just 0.98%.This paper proposes a novel method of multibeam laser heterodyne measurement for an electrostriction coefficient. Based on the Doppler effect and heterodyne technology, loaded with the information of length variation to the frequency difference of the multibeam laser heterodyne signal by the frequency modulation of the oscillating mirror, this method can obtain many values of length variation caused by different voltages after the multibeam laser heterodyne signal demodulation simultaneously. Processing these values by a weighted- average method, it can obtain length variation accurately, and eventually obtain value of electrostriction coefficient of metal by the calculation. This novel method is used to simulate measurement for electrostriction coefficient of PZT under different voltages by MATLAB, and the obtained result shows that the relative measurement error of this method is just 0.98%.

分 类 号：TN248.4[电子电信—物理电子学] TQ334.9[化学工程—橡胶工业]