Keywords: 
• 外部光反馈VCSEL /
• 矢量混沌偏振 /
• 线性电光效应 /
• 极化铌酸锂晶体

Abstract: Based on the wave coupling theory of linear electrooptic effect in quasi-phase-matched periodical poled LiNbO_3（PPLN）.the control of the vector chaotic polarization of VCSEL output with external optical feedback by electro-optic modulation is numerically investigated.The investigation results show the polarization state of VCSEL output switching periodically with the applied external electronic field or the length of the crystal.The original chaotic polarized state of its output caused by different parameters of VCSEL can be converted into the olher arbitrary chaotic polarized state.In particular,by controlling a certain applied external electronic field or the length of the crystal,any chaotic polarization model of VCSEL output can be converted into two complete identical linear chaotic polarization models（x and y polarizations）.In the case,the energies of two linear chaotic polarization models can steadily realize balanced status.