电光调制对外部光反馈垂直腔表面发射激光器输出矢量混沌偏振的操控

Manipulation of the vector chaotic polarization of VCSEL output with external optical feedback by electro-optic modulation

基于周期性极化铌酸锂晶体的线性电光效应耦合波理论,数值研究了电光调制对外部光反馈垂直腔表面发射激光器(VCSEL)输出矢量混沌偏振模的操控.研究结果表明,VCSEL输出的偏振度随着电光晶体的长度或施加于电光晶体的外电场强度成周期性转换,控制一定的施加外电场强度和晶体的长度,激光器的不同参数下引起初始混沌偏振态都可以转换为其他任意混沌偏振态.特别是合理选择一定的施加外电场强度或晶体长度.VCSEL输出的任意混沌偏振模可以转换为完全一致的两线性混沌偏振模(x和y偏振),即两线性混沌偏振模的能量能够达到稳定和万全均衡.

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.