基于光电负反馈的光注入1550nm垂直腔面发射激光器产生窄线宽微波信号

发布时间：2018-05-23 11:36

本文选题：非线性光学 + 半导体激光非线性动力学　；参考：《光子学报》2017年03期

【摘要】：基于1 550nm垂直腔面发射激光器在平行偏振光注入下呈现的单周期非线性动力学状态,进一步引入光电负反馈,得到了高质量的微波信号.实验研究结果表明:平行偏振光注入下,通过调节注入光的注入强度及频率,1 550nm垂直腔面发射激光器可呈现注入锁定、单周期、倍周期、混沌等多种非线性动力学状态;在合适的注入参量下,平行偏振光注入1 550nm垂直腔面发射激光器可产生光谱具有单边带结构、频率超过10GHz的光子微波信号,但该微波信号的线宽较宽(达MHz量级);进一步引入光电负反馈后,通过选取合适的光电反馈强度,可将该微波信号的线宽减小至一百多kHz(减小两个量级以上);在选择优化的反馈强度条件下,仅通过简单调节注入光强度,可实现窄线宽光子微波信号的频率在一定范围内连续可调谐.
[Abstract]:Based on the single period nonlinear dynamic state of 1 550nm vertical cavity surface-emitting laser under parallel polarized light injection, a high quality microwave signal is obtained by introducing optoelectronic negative feedback. The experimental results show that, by adjusting the injection intensity and frequency of the injected light, a 1 550nm vertical cavity surface-emitting laser can present a variety of nonlinear dynamic states, such as injection locking, single period, double period, chaos and so on. Under suitable injection parameters, a parallel polarized laser injected with 1 550nm vertical cavity surface emitting laser can produce a photonic microwave signal with a single sideband structure and a frequency greater than 10GHz. However, the line width of the microwave signal is wider (up to the MHz order of magnitude). After further introduction of optoelectronic negative feedback, the appropriate optoelectronic feedback intensity is selected. The line width of the microwave signal can be reduced to more than 100 kHz (by more than two orders of magnitude). The frequency of narrow-linewidth photonic microwave signal can be continuously tunable in a certain range.
【作者单位】：西南大学物理科学与技术学院;
【基金】：国家自然科学基金(Nos.61275116,61475127,61575163)资助~~
【分类号】：TN248

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