Tseng Chin-Hao, Hwang Sheng-Kwang
Opt Lett. 2020 Jul 1;45(13):3777-3780. doi: 10.1364/OL.396332.
This Letter studies a photonic approach for chaotic microwave generation through destabilization of period-one (P1) nonlinear dynamics in a semiconductor laser subject to intensity-modulated (IM) optical injection. Chaos can be excited when the modulation sideband perturbation carried by the IM optical injection is a few gigahertz higher than the lower oscillation sideband of the P1 dynamics. As a result, chaotic microwaves with a spectral distribution of more than 50 GHz and a bandwidth of about 33 GHz are generated without any time-delay signature or modulation-induced peak. Such features provide the generated chaotic microwaves with preferable characteristics for radar applications, including high detection resolution, superior detection unambiguity, strong anti-jamming capability, and simultaneous multi-band detection.
本信函研究了一种通过强度调制（IM）光注入使半导体激光器中的周期一（P1）非线性动力学失稳来产生混沌微波的光子学方法。当IM光注入所携带的调制边带扰动比P1动力学的较低振荡边带高几吉赫兹时，混沌就会被激发。结果，产生了频谱分布超过50 GHz且带宽约为33 GHz的混沌微波，且没有任何时延特征或调制诱导峰。这些特性为所产生的混沌微波提供了适用于雷达应用的优良特性，包括高检测分辨率、卓越的检测无模糊性、强大的抗干扰能力以及同时多频段检测。
