提出一种可用于降低半导体激光器(SL)输出混沌光的自相关性并增加其带宽的方案。该方案将具有单路相位调制光反馈的SL作为主激光器,将具有双路滤波光反馈的SL作为从激光器,并将主激光器输出的激光注入到从激光器中。数值研究了抽运因子、外光注入系数和主从激光器之间的频率失谐对从激光器输出混沌光的自相关性及其带宽的影响。结果表明:在所选的参数条件下,该方案能有效地降低从激光器输出混沌光的自相关性并增加其带宽,混沌激光带宽的极大值达到18.45 GHz。

A scheme for eliminating the autocorrelation and broadening the bandwidth of chaotic laser from semiconductor lasers (SL) is proposed. In this scheme, a SL with single-channel phase modulation optical feedback is taken as the master laser, and a SL with double-channel filter optical feedback is taken as the slave laser. The laser from the master laser is injected into the slave laser. We numerically investigate the influences of parameters, such as the pumping factor, external light injection coefficient and frequency detuning between master and slave lasers, on the autocorrelation and bandwidth of chaotic laser from slave laser. The results show that the proposed scheme can effectively reduce the autocorrelation and broaden the bandwidth of chaotic laser form slave laser under the selected parameter conditions. The bandwidth maximum value of chaotic laser can reach 18.45 GHz.