实验研究了弱谐振腔法布里-珀罗激光器在受到光注入扰动时的非线性动力学特性．通过测定“－3模”、“0模”、“13模”三个纵模输出的时间序列, 功率谱和光谱分布, 对其非线性动力学状态进行了判定．研究结果表明: 引入光注入后, 通过改变注入强度及频率失谐, 这三个纵模均可呈现出四波混频、单周期态、准周期态、混沌态以及稳定的光注入锁定态等非线性动力学特性, 其动力学演化路径为经准周期分岔进入混沌态．此外, 为实现对动力学状态的精确控制, 绘制了这三个纵模在光注入强度0 μW到450 μW和频率失谐－16 GHz到16 GHz构成的参量空间的动力学状态分布图．结果显示: “0模”与“13模”在正、负频率失谐均可观察到混沌区域, 而“－3模”在负频率失谐没有出现混沌区域; “0模”存在两个分离的稳定的光注入锁定态区, 而在“－3模”和“13模”仅观测到一个稳定的光注入锁定态区.

The nonlinear dynamics of a weak-resonant-cavity Fabry-Perot laser diode subject to optical injection was experimentally investigated. By recording the time series, power spectra and optical spectra of three longitudinal modes (“mode －3”, “mode 0”, and “mode 13” ) in the weak-resonant-cavity Fabry-Perot laser diode, the nonlinear dynamical states have been determined. The results show that, after introducing optical injection, through varying injection strength and frequency detuning, the three longitudinal modes can exhibit four-wave mixing, period one, quasi-period, chaos, and stable injection-locking, and the dynamical evolution route is from quasi-period to chaos. Moreover, in order to control the dynamical state accurately, we draw the dynamical state mappings of the three longitudinal modes in the parameter space of injection strength from 0 μW to 450 μW and frequency detuning from －16 GHz to 16 GHz. The results demonstrate that the chaotic region can be observed in the positive and negative frequency detuning for “mode 0” and “mode 13”, but cannot be observed in the negative frequency detuning region for “mode －3”. And there exist two separate stable injection-locking regions for “mode 0”, but there is only one stable injection-locking region for “mode －3” and “mode 13”.