Elimination of the measurement error induced by piezoelectric ceramic nonlinearity in phase retardation measurement

摘要

We introduce a displacement measurement system based on the isotropic optical feedback technique to measure length variations in the feedback cavity. The principle of the system is based on frequency shifting and heterodyne phase-measuring. Using this system, displacements of some feature points in the intensity output of the laser such as polarization switching are measured. Based on the measured results, a linear relation is established between the position of the polarization switching and the anisotropy. This forms the basis of future applications of the polarization control technique in the field of optical measurement. (C) 2014 Elsevier Ltd. All rights reserved.