Research on conversion of randomly polarized light to linearly polarized light

• Main Authors: CHEN,CHIEN-YU, 陳建有
• Other Authors: HSU,CHIA-CHEN
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/fy33df

碩士 === 國立中正大學 === 物理系研究所 === 107 === In this thesis, I presented a linear polarization conversion system. First, using a polarization beam splitter divided unpolarized light to p-polarized beam and s-polarized beam, then using a PZT to control phase difference between two beams to be 0.Finally, using a polarization beam splitter combined these two beams to be a linear polarized beam. In this research, the linear polarization converting system was integrated with a phase detection system by which Stokes parameters were measured. The phase detection system sent a feedback voltage, determined by Stokes parameters, back to the PZT to make p-polarized and s-polarized light in phase. Therefore, the random-polarized light can be converted to be linear-polarized. Using the linear polarization conversion system with sin-1 feedback method, I can convert an elliptical polarized light with a minimum/maximum ratio of 0.3323 to a quasi-linear polarized light with a minimum/maximum ratio of 0.0194. In addition, with tan-1 feedback method can convert an elliptical polarized light with a minimum/maximum ratio of 0.3976 to a quasi-linear polarized light with a minimum/maximum ratio of 0.0334.