Fig. 1. Experimental setup for the RF spectrum analysis of optical feedback FP laser (FP-LD, Fabry-Perot laser diode; PC, polarization controller; VOA, variable optical attenuator; FM, fiber mirror; EDFA, erbium-doped fiber amplifier; BPF, optical bandpass filter; PD, photodetector; ESA, electrical spectrum analyzer; OSA, optical spectrum analyzer).基于光反馈FP激光器混沌频谱特性分析实验装置(FP-LD, 法布里-珀罗激光二极管; PC, 偏振控制器; VOA, 可调光衰减器; FM, 光纤反射镜; EDFA, 掺铒光纤放大器; BPF, 可调光滤波器; PD, 光电探测器; ESA, 频谱仪; OSA, 光谱仪)

Fig. 2. Characteristics of the multi-mode chaos: (a) Optical spectrum; (b) RF spectrum.多模混沌激光特性实验结果　(a)光谱; (b)频谱

Fig. 3. Characteristics of single-mode chaotic signals (m = –1, 0, +1): (a1)−(a3) Optical spectra; (b1)−(b3) RF spectra. m = –1, 0, +1模式下的单模混沌信号特性实验结果　(a1)—(a3)光谱; (b1)—(b3)频谱

Fig. 4. Numerical results of multi-mode FP-LD with optical feedback: (a) Optical spectrum (M = 15); (b) power spectrum. 多纵模光反馈FP激光器数值仿真结果　(a) 光谱(M = 15); (b) 频谱

Fig. 5. Simulation results of single-mode chaotic signals (m = –1, 0, +1): (a1)−(a3) Power spectra; (b1)−(b3) time series; (c1)−(c3) cross-correlations. 光反馈多模激光器在3个模式(m = –1, 0, +1)下单模混沌信号的模拟结果　(a1)—(a3) 频谱; (b1)—(b3) 时序; (c1)—(c3) 互相关函数

Table 1. Simulation parameters of FP-LD with optical feedback.