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.
Based on the period-one dynamical state emerging in a 1 550 nm vertical-cavity surfaceemitting laser with parallel optical injection,high-quality photonic microwave was acquired after further introducing optoelectronic negative feedback.The experimental results show that,under parallel polarized optically injection,1 550 nm vertical-cavity surface-emitting laser can exhibit rich nonlinear dynamics behaviors such as stable injection locking,period-one,period-two and chaos through adjusting injection strength and frequency detuning.Under suitable injection condition,a parallel polarized optically injected 1 550 nm vertical-cavity surface-emitting laser can generate a photonicmicrowave signal with a single sideband optical spectrum structure and a frequency over 10 GHz,but the linewidth of the microwave signal is relatively wide（on the order of MHz）.After further introducing optoelectronic negative feedback,the linewidth of the microwave signal can be narrowed to about 100kHz（reduced to more than two orders of magnitude）by choosing proper photoelectric feedback intensity.Furthermore,under the case that the feedback strength is set at the optimized value,the frequency of the narrow-linewidth microwave signal can be tuned continuously within a certain range through simply varying the injection strength.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2017年第3期69-75,共7页
Acta Photonica Sinica
基金
国家自然科学基金(Nos.61275116
61475127
61575163)资助~~
关键词
非线性光学
半导体激光非线性动力学
实验技术
垂直腔面发射激光器
光子微波
光注入
光电负反馈
Nonlinear optics
Nonlinear dynamics of semiconductor lasers
Experimental technique
Vertical-cavity surface-emitting laser
Photonic microwave
Optical injection
Optoelectronic negative feedback
