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基于自旋反转模型,研究了1550 nm垂直腔面发射激光器(VCSELs)在偏振保持光反馈下的非线性动力学特性.结果表明:自由运行的1550 nm-VCSELs在电流增加的过程中,发生偏振转换所对应的电流值与内部参数的取值有关,随着有源介质线性色散效应系数γ_a的增大,偏振开关的转换点所对应的电流值将增加;偏振保持光反馈的引入将导致1550 nm-VCSELs中自由运行时的主导模(Y偏振模式)在不同电流下呈现不同动力学状态,引起另外一个模式(X模式)激射,两个模式的平均输出功率随电流的增加总体呈现增加的趋势,但伴随着起伏;反馈时间取不同值时,1550 nm-VCSELs的输出随着反馈强度的增大经历倍周期、准周期或阵发混沌等多种通向混沌的演化途径.
Based on the spin-inversion model, the nonlinear dynamics of 1550 nm vertical-cavity surface-emitting lasers (VCSELs) under polarization-maintaining optical feedback was investigated. The results show that the free-running 1550 nm VCSELs The current value corresponding to the polarization conversion is related to the value of the internal parameter. As the linear dispersion coefficient γ_a of the active medium increases, the current value corresponding to the switching point of the polarization switch will increase. The introduction of polarization-maintaining optical feedback will result in The dominant mode (Y-polarization mode) of free-running in 1550 nm-VCSELs exhibits different dynamic states at different currents, causing another mode (X-mode) lasing. The average output power of both modes is generally presented as the current increases However, with the feedback time taking different values, the output of 1550 nm-VCSELs undergoes many kinds of evolutionary paths leading to chaos, such as doubling period, quasiperiodic or intermittent chaos as the feedback strength increases.