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从理论和实验上研究了利用光注入半导体激光器对高重复速率光脉冲产生的周期振荡和时钟分频现象.结果表明,光注入半导体激光器引起的二倍周期振荡是使注入脉冲重复频率分频的直接原因.通过耦合速率方程,数值模拟了半导体激光器在外光注入时输出光的时间序列和功率谱,并且分析了激光腔内各种周期振荡的特征.研究表明,当注入光使半导体激光器出现稳定的二倍周期振荡,且注入光的重复频率为此振荡频率的二倍时,时钟分频即可产生.实验中,采用重复频率为6.32GHz的光脉冲注入Fabry-Perot激光器,实现了3.16GHz时钟分频信号的输出.所得实验结果与理论分析相符.
The periodic oscillation and clock frequency division of the high repetition rate optical pulse using the semiconductor laser with light injection have been theoretically and experimentally studied. The results show that the double-cycle oscillation caused by the optical injection semiconductor laser is to divide the repetition rate of the injection pulse The direct reason is that the time series and power spectrum of the output light of the semiconductor laser are numerically simulated by the coupled rate equation and the characteristics of the various periodic oscillations in the laser cavity are analyzed.The results show that when the injected light makes the semiconductor laser stable Of the double-cycle oscillation, and the injection frequency of the repetition rate of this oscillation frequency twice, the clock frequency can be generated.In the experiment, the use of repetition rate of 6.32GHz optical pulses into the Fabry-Perot laser, to achieve 3.16GHz Clock frequency signal output.The experimental results are consistent with the theoretical analysis.