窄带ASE注入分布反馈式半导体激光器产生混沌光实验研究

Experiment of chaotic DFB laser diodes subject to sliced amplified spontaneous emissions

利用窄带的放大自发辐射作为外部光源扰动分布反馈式半导体激光器,使其实现混沌态输出。基于对实验数据标准化香农熵和峰峰值的计算,分析了注入强度对产生混沌信号的复杂度和幅值的影响,并与采用连续光注入分布反馈式半导体激光器生成的混沌信号做对比研究。研究表明,同样条件下,采用窄带的放大自发辐射扰动激光器产生混沌信号,容许的注入参数范围更广,所生成的混沌信号的复杂度更高,幅值更大。

Generation of chaos using a distributed feedback laser diodes （DFB-LD） with amplified spontaneous emissions is experi- mentally demonstrated. We analyze the effect of injection strength and detuning frequency on the complexity and amplitude of the generated chaotic signals through normalized Shannon entropy and peak-to-peak value. We find that, in comparison with the cha- otic signals generated by a continuous-wave optical injected DFB laser, those generated by amplified spontaneous emission injec- tion have broader injection parameters, higher complexity and larger amplitude.