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2016年12月14日 学术报告

来源： 发布时间：2016-12-12【字体：大 中 小】

　　报告时间：2016年12月14日，上午10:00 

　　报告地点：1号楼108会议室 

　　报 告 人：庞盟 

　　Title: Optomechanical interactions in pulsed fibre lasers – from high-harmonic mode-locking to all-optical bit storage 

　　Abstract: 

　　Pulsed fibre lasers mode-locked at a high harmonic of their round-trip frequency have many potential applications, from telecommunications to data storage. Control of multiple pulses in passively mode-locked fibre lasers has, however, proven very difficult to achieve. This has recently changed with the advent of fibre lasers mode-locked by intense optomechanical interactions in a short length of photonic crystal fibre (PCF). Optomechanical coupling between cavity modes gives rise to highly stable, optomechanically bound, laser soliton states. The repetition rate of these states corresponds to the mechanical resonant frequency in the PCF core, which can be a few GHz. In this talk, we will show that a fibre laser coupled with a mechanical resonator can be successfully used for generating GHz-repetition-rate ultrafast pulse train, as well as storing optical-soliton-bits over many hours corresponding to an error-free transmission of GHz-rate soliton sequence over tens of billion kilometres. 

　　高次谐波锁模脉冲光纤激光器在光通信和光存储上有较为广泛的应用。但是，如何控制激光腔内的多个脉冲是一个难题。随着光子晶体光纤里光机械相互作用在光纤脉冲激光器里的应用，这个难题得到了一定的解决。激光腔内的强光机械相互作用导致了激光器多纵模间的相互耦合，从而产生一系列强束缚激光孤子态。这些孤子态的重复频率和光子晶体光纤的机械谐振频率锁定，能达到千兆赫兹。在此次报告里，我将介绍与机械谐振相耦合的光纤激光器系统。并讨论如何利用这一系统产生千兆赫兹飞秒脉冲光源，和实现光纤激光腔内的长时间全光信息存储。 

　　Biography: 

　　Meng Pang graduated from Tianjin University (with bachelor degree) and Tsinghua University (with Master degree) in 2004 and 2007. He obtained his Ph. D degree from Hong Kong Polytechnic University in 2011. In Prof. Wei Jin’s group at PolyU, his Ph. D project was focused on hollow-core photonic crystal fibre sensors and devices. In 2011, He joined Prof. Xiaoyi Bao’s group as a postdoc fellow at University of Ottawa, Canada, where he studied random fibre lasers and nonlinear fibre optics. From 2013, he worked as a postdoc fellow in Russell’s division, Max-Planck Institute for Science of Light (MPL), Germany. His research topics at MPL include optomechanical effects in photonic crystal fibres, mode-locked fibre lasers and pulse propagation in optical fibres. 

　　庞盟博士，分别于2004年和2007年分别于天津大学和清华大学获得学士和硕士学位。他于2011年于香港理工大学获得博士学位。导师为靳伟教授，博士课题是空心光子晶体光纤传感及器件研究。2011年加入加拿大渥太华大学鲍晓毅教授课题组，从事博士后研究，研究课题是非线性光纤光学和随机光纤激光器。之后于2013年加入德国马普光学所罗素课题组，从事博士后研究，研究课题是光子晶体光纤里的声光效应，锁模激光器和光纤中的光脉冲传播。 

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