Spectroscopic Stokes Polarimetry Based on Fourier Transform Spectrometer and Phase Error Calibration in Michelson Interferometer

摘要

Three methods are proposed for measuring the spectroscopic/monochromatic Stokes parameters using a Fourier transform spectrometer In the first method the parameters are extracted using an optical setup comprising a white light source a polarizer set to 0° a quarter-wave plate and a scanning Michelson interferometer In the proposed approach the parameters are extracted from the intensity distributions of the interferograms produced with the quarter-wave plate rotated to 0° 22 5° 45° and -45° respectively In the second approach the interferograms of two-dimensional detection also can be simultaneously extracted via a pixilated phase-retarder and polarizer array made from photonic crystal on a high-speed CCD camera and a parallel read out circuit with a multi-channel analog to digital converter Thus a full-field and dynamic spectroscopic Stokes polarimetry without any rotating components could be developed Finally in the third method the white light source is replaced by a monochromatic light source the interferometer is removed and a simple Stokes polarimetry is introduced in this study The validity of the proposed methods is demonstrated both numerically and experimentally To the authors’ knowledge this could be the simplest optical arrangement in extracting the spectral Stokes parameters Importantly the latter two methods avoid the need for rotating components within the optical system and therefore provide an experimentally straightforward means of extracting the spectral Stokes parameters In addition the study is also proposed the compensation of phase distortion of beam splitter in Michelson interferometer The method using Q H Q structure on the principle of compensation is proposed Before phase errors is compensated you can confirm whether this model can be compensated using genetic algorithms this method can greatly reduce the phase distortion errors of beam splitter

獎項日期	2014 8月 1
原文	English
監督員	Yu-Lung Lo (Supervisor)