Complete chaotic synchronization characteristics of the linear-polarization mode of vertical-cavity surface-emitting semiconductor lasers with isotropic optical feedback
Complete chaotic synchronization characteristics of the linear-polarization mode of vertical-cavity surface-emitting semiconductor lasers with isotropic optical feedback
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DOI：
10.1016/j.optcom.2007.11.021
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发表时间：
2008-03
影响因子：
2.4
通讯作者：
D. Zhong;G. Xia;Zhengmao Wu;X. Jia
中科院分区：
文献类型：
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作者：
D. Zhong;G. Xia;Zhengmao Wu;X. Jia
基于SFM模型[M.San Miguel，Q.Fung，J.V.Moloney，Phys.Rev.A.52(1995)1728.]，数值研究了各向同性光反馈垂直腔面发射半导体激光器(VCSEL)线偏振(LP)模全混沌同步特性。当光从发射机到接收机的传输时间τ等于外腔往返时间τ，并且T_VCSEL的中心频率与R_VCSEL的中心频率匹配时，在x偏振模式和y偏振模式同时获得高同步质量的反馈系数和注入电流的大范围范围内。然而，在x和y极化模式可能同时获得较差同步质量的中心频率失配区。但对于τc≠τ，混合偏振模式的各个LP模的同步质量同时较差。此外，在注入电流足够大的情况下，当反馈系数和Δτ(=τc−τ固定在一定值时，系统在两个激光器中具有相同中心频率的输出完全受y偏振模式的支配。因此，该系统可以实现完全占优的y偏振模的稳定良好同步。但是，随着绝对频率失谐值的增大，完全占优的y偏振模的同步质量会恶化。此外，在正频率失配区，相同频率失谐值对完全控制的y偏振模的同步质量的影响小于负频率失谐区。最后，当给定τ且T_VCSEL的中心频率与R_VCSEL的中心频率匹配时，τ的影响在接收端VCSEL的时间演化中不是简单的时移，这将严重影响每种LP模式的完全同步质量。
Based on the SFM model [M. San Miguel, Q. Feng, J.V. Moloney, Phys. Rev. A. 52 (1995) 1728.], complete chaotic synchronization characteristics of linear-polarization (LP) Mode of the vertical-cavity surface-emitting semiconductor lasers (VCSELs) with isotropic optical feedback are numerically investigated. When the propagation time τcof light from the transmitter to the receiver equals to the external cavity round-trip time τ, and the central frequency of the T_VCSEL matches that of the R_VCSEL, in large scale region of the feedback coefficient and the injection current where the x-polarization mode as well as the y-polarization mode obtains high synchronization quality at the same time. However, in the central frequency mismatch regions where the x- and y-polarization mode can obtain inferior synchronization quality at same time. But for τc≠τ, each LP mode of the mixed polarization modes achieved inferior synchronization quality at the same time. Besides, with big enough injection current, the output of the system with the same central frequency in two lasers is entirely governed by the y-polarization mode when the feedback coefficient and Δτ(=τc−τ) fixed at a certain value. So the system can realize steadily good synchronization of the completely dominant y-polarization mode. But the synchronization quality of the completely dominated y-polarization mode can be deteriorated by increasing absolute frequency detuning value. Besides, in positive frequency mismatch regions where the influence of the same frequency detuning value on the synchronization quality of the entirely governed y-polarization mode becomes smaller than in negative frequency detuning regions. At last, when τ is given and the central frequency of the T_VCSEL matches that of the R_VCSEL, the influence of the τcis not a simple time-shift in the time-evolution of the receiver VCSEL, which has serious influence on the complete synchronization quality of each LP mode.