时 间：2019年5月13日10:00

地 点：光电国家研究中心 A301

报 告 人：包华龙 博士, 英国萨塞克斯大学

邀 请 人：周军 教授

报告题目：

滤波器驱动四波混频激光微腔频率梳

Filter-Driven Four Wave Mixing Laser Micro-combs

报告摘要 (Abstract)：

一种基于光学克尔效应的新型微腔光频梳产生技术近年来成为国际研究热点。由于其小型化、超高重复频率等特点使其在精密光谱测量，微波产生、光通信等众多领域发挥重要作用。本报告主要介绍一种基于微环谐振腔和环形增益光纤腔相结合的结构来实现光频率梳的产生，通过合理地控制微环谐振腔和环行增益光纤腔的参数，实现了几种不同的稳定态，包括激光腔孤子，图灵环和第二类光频率梳等。

The generation of optical frequency combs in microresonators or micro-combs has developed into a hot research area in the past decade. Because of their unique characteristics, they have the potential to revolutionise many fields, spanning from metrology to optical communications. In this presentation, I will introduce how we achieve microcomb generation based on nesting a high-Q, nonlinear microresonator in a fibre laser loop. We termed this scheme filter-driven four-wave mixing (FD-FWM) laser, because the nonlinear interaction necessary to sustain the pulses generation is four-wave mixing (FWM) driven by an intra-cavity filter. In the system, several stable operating regimes, including laser cavity-solitons, Turing patterns and Type-II combs, over a wide range of operating conditions have been achieved. Our recent developments will be presented in details.

报告人简介（Biography):

包华龙博士目前是英国萨塞克斯大学博士后研究员。2015年于丹麦技术大学取得博士学位，同年加入英国萨塞克斯大学新兴光子实验室工作，研究兴趣为微型谐振腔光学频梳技术，光纤激光器，太赫兹波导器件， 光纤传感等领域，以第一作者在Nature Photonics, Scientific Reports, Research Photonics, Optics Express等国际SCI期刊上发表论文十余篇。曾获国际会议IEEE ICOCN2017青年科学家奖。

Dr. Bao received the PhD degree from the Department of Photonics Engineering, Technical University of Denmark in 2015. At the same year, he joined the Emergent Photonics Laboratory at the University of Sussex as a postdoctoral research fellow. His current research interests include the micro-resonator based frequency combs generation, fibre lasers, terahertz waveguides, fibre sensors. He has published more than 10 journal papers including Nature Photonics, Scientific Reports, Research Photonics, Optics Express. He won the Young Scientist Award at the conference IEEE ICOCN2017.