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数值研究了各向异性光反馈注入的垂直表面发射激光器(VCSEL)的矢量偏振模转换机理,研究结果表明,首先,当注入电流接近阈值电流时,由VCSEL的外部参数和偏振器控制的光反馈注入量中各偏振模的能量决定VCSEL输出的偏振态.其次,由偏振器控制的各向异性光反馈注入引起的VCSEL输出偏振态呈周期性变化.另外,当由偏振器控制的反馈注入量中的^x偏振和^y偏振模能量相当时,^x偏振模和y^偏振模之间竞争激烈,而激光器外部微小的扰动都会打破这两种偏振模竞争平衡,从而使激光器输出偏振态对外部参数变化非常敏感.最后,当注入电流远大于阈值电流时,^y偏振模增益获得足够大,这时VCSEL输出为稳定的y^偏振,即VCSEL的输出偏振态与其他参数无关.
The results show that when the injection current is close to the threshold current, the external parameters of the VCSEL and the optical feedback controlled by the polarizer are used to investigate the mechanism of anisotropic optical feedback. The energy of each polarization mode in the injection determines the polarization state of the VCSEL output.Secondly, the polarization state of VCSEL output caused by the polarization-controlled anisotropic optical feedback injection periodically changes.In addition, when the amount of feedback injection controlled by the polarizer In the ^ x polarization and ^ y polarization mode energy equivalent, ^ x polarization mode and y ^ polarization mode intense competition, and laser minor external disturbances will break the polarization balance of these two modes, so that the laser output polarization state The sensitivity of the external parameters is very sensitive.Finally, when the injection current is much larger than the threshold current, ^ y polarization mode gain is sufficiently large, VCSEL output is stable y ^ polarization, VCSEL output polarization state has nothing to do with other parameters.