强光注入提高光反馈VCSELs混沌载波基频

Improving chaotic carrier fundamental frequency in VCSELs with optical feedback by strong light injection

研究了外部光注入对光反馈垂直腔表面发射半导体激光器(VCSEL)混沌载波基频的影响.研究结果表明:当外部注入光频率与VCSEL自由运行的振荡频率失谐一定时,随着外部光注入强度的增加,混沌载波基频总体呈现上升的趋势;通过调整失谐频率和注入强度大小,外部光注入可以使混沌载波基频得到大幅度的提高;当归一化的注入系数K=330,失谐频率为42GHz,可得到基频位于47.3GHz的混沌信号输出.

In this paper, the influence of the external light injection on the chaotic carrier fundamental frequency of vertical-cavity surface-emitting lasers （VCSELs） with optical feedback have been investigated. The results show that, for the fixed frequency offset between the master laser diode and the slave VCSEL, the chaotic carrier fundamental frequency will generally increase with the increase of injection intensity; the chaotic carrier fundamental frequency can be improved significantly by adjusting frequency offset and injection intensity. For the normalized injection intensity K of 330 and frequency offset 42 GHz, chaotic output with 47.3GHz fundamental frequency can be obtained.