Ge Zengting, Hao Tengfei, Capmany José, Li Wei, Zhu Ninghua, Li Ming
State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, 100083, Beijing, China.
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, 100049, Beijing, China.
Nat Commun. 2020 Nov 12;11(1):5724. doi: 10.1038/s41467-020-19596-x.
Random scattering of light in transmission media has attracted a great deal of attention in the field of photonics over the past few decades. An optoelectronic oscillator (OEO) is a microwave photonic system offering unbeatable features for the generation of microwave oscillations with ultra-low phase noise. Here, we combine the unique features of random scattering and OEO technologies by proposing an OEO structure based on random distributed feedback. Thanks to the random distribution of Rayleigh scattering caused by inhomogeneities within the glass structure of the fiber, we demonstrate the generation of ultra-wideband (up to 40 GHz from DC) random microwave signals in an open cavity OEO. The generated signals enjoy random characteristics, and their frequencies are not limited by a fixed cavity length figure. The proposed device has potential in many fields such as random bit generation, radar systems, electronic interference and countermeasures, and telecommunications.
在过去几十年里，光在传输介质中的随机散射在光子学领域引起了广泛关注。光电振荡器（OEO）是一种微波光子系统，在产生具有超低相位噪声的微波振荡方面具有无与伦比的特性。在此，我们通过提出一种基于随机分布反馈的OEO结构，将随机散射和OEO技术的独特特性相结合。由于光纤玻璃结构内部不均匀性引起的瑞利散射的随机分布，我们在开放腔OEO中演示了超宽带（从直流起高达40 GHz）随机微波信号的产生。所产生的信号具有随机特性，其频率不受固定腔长数值的限制。所提出的器件在随机比特生成、雷达系统、电子干扰与对抗以及电信等许多领域具有潜力。
