基于量子点激光器的窄线宽光子微波信号获取  

Narrow Linewidth Photonic Microwave Signal Generation Based on a Quantum Dot Laser

作　　者：蒋再富[1] 张定梅[1] 汤蕊旖 Jiang Zaifu;Zhang Dingmei;Tang Ruiyi(School of Mathematics and Science,Jingchu University of Technology,Jingmen 448000,Hubei,China)

机构地区：[1]荆楚理工学院数理学院,湖北荆门448000

出　　处：《应用激光》2024年第1期126-133,共8页Applied Laser

基　　金：2022年湖北省自然科学基金项目(2022CFB527);2022年湖北省高等教育协会学会共同体建设重点项目(2022XD71);2022年荆楚理工学院校级科研项目(YY202207,YB202212)。

摘　　要：利用量子点激光器(QDL)速率方程和光纤布拉格光栅(FBG)滤波模型,对光注入和FBG光反馈下QDL产生的光子微波信号的性能进行数值研究,并利用光谱、频谱和线宽技术衡量了微波信号的质量。研究发现,对于固定的频率失谐,微波频率对于注入强度的改变具有鲁棒性,微波强度随着注入强度的增加先增加后减小。考虑光注入条件下产生的微波线宽约为0.5 MHz,线宽较宽,引入了FBG滤波光反馈对微波线宽进行了窄化,发现通过适当调节反馈参数,微波线宽可以被压缩到1 kHz左右,线宽压缩效果明显。研究结果可为QDL在光生微波中的应用提供理论参考。Using the rate equation of quantum dot laser(QDL) and the filtering model of fiber Bragg grating(FBG),the property of the photon microwave signals generated by a QDL subject to optical injection and FBG optical feedback is numerically investigated.The quality of the microwave signals is judged using optical spectrum,frequency spectrum,and linewidth techniques.The results show that for the fixed frequency detuning,the microwave frequency is robust to injection intensity and the microwave intensity first increases and then decreases with the increase of injection intensity.Considering that the microwave linewidth generated by optical injection is about 0.5 MHz,which is relatively wide,FBG filtering optical feedback is introduced to narrow the microwave linewidth.It is found that by adjusting the feedback parameters appropriately,the microwave linewidth can be compressed to around 1 kHz,and the linewidth compression effect is obvious.The research results can provide theoretical support for the application of the QDL in photogenerated microwaves.

关 键 词：非线性动力学 量子点激光器 光纤布拉格光栅 光反馈 线宽 

分 类 号：O437.1[机械工程—光学工程]