Photonic Microwave Generation and Stabilization Using Self-Feedback Semiconductor Lasers Subject to Optical Feedback
Kai-Hung Lo1*, Sheng-Kwang Hwang1,2
1Department of Photonics, National Cheng Kung University, Tainan, Taiwan
2Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan
* presenting author:Kai-Hung Lo,
Self-feedback can elicit period-one nonlinear dynamics, others call self-pulse, from semiconductor laser. Without electronic microwave generator, the period-one dynamics are all-optical and tunable microwave generation from tens even to one hundred of gigahertz under various feedback strength, delay time and delay phase. Owing to the intrinsic laser noise, the disturbance of microwave restricts the applications of period-one. External optical feedback can stabilize such generated microwave, and reduce 3-dB linewidth. In this study, we numerically research how the external optical feedback influences the characteristics of period-one nonlinear dynamics, induced by self-feedback, in semiconductor laser under various optical feedback conditions.

Keywords: optical feedback, microwave, nonlinear dynamics