Polarization modulation in single-frequency He-Ne laser with an anisotropy feedback cavity  

作　　者：陈文学 张书练 龙兴武 

机构地区：[1]Department of Opto-Electronic Engineering,College of Opto-Electric Science and Engineering,National University of Defense Technology [2]The State Key Lab of Precision Measurement Technology and Instrument,Department of Precision Instruments,Tsinghua University

出　　处：《Chinese Optics Letters》2012年第5期54-57,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 61036016);the Scientific and Technological Achievements Transformation and Industrialization Project by the Beijing Municipal Education Commission

摘　　要：The polarization state is modulated by tilting birefringence component placed in the feedback external cavity.The variation of the polarization state in one period of modulation is found to be similar to sine wave.The periods become increasingly smaller.The maximum of variation in one period decreases against the rotated angle.The experimental phenomenon is subjected to the change of optical path and secondary reflection.The phenomenon is analyzed theoretically based on geometrical optics and crystal optics.High-accuracy measurements of absolute and relative angles can be realized based on the experimental phenomenon.The angle resolution is 0.1 arcsec in theory.The polarization state is modulated by tilting birefringence component placed in the feedback external cavity.The variation of the polarization state in one period of modulation is found to be similar to sine wave.The periods become increasingly smaller.The maximum of variation in one period decreases against the rotated angle.The experimental phenomenon is subjected to the change of optical path and secondary reflection.The phenomenon is analyzed theoretically based on geometrical optics and crystal optics.High-accuracy measurements of absolute and relative angles can be realized based on the experimental phenomenon.The angle resolution is 0.1 arcsec in theory.

关 键 词：CRYSTALLOGRAPHY Geometrical optics Physical optics State feedback 

分 类 号：TN24[电子电信—物理电子学]