【学术报告】美国康奈尔大学Prof.Frank W. Wise第二场学术报告
发布人:江苏省先进激光技术与新兴产业协同创新中心 发布时间:2015-01-09 浏览次数:

 2014年12月14日上午10:00Prof. Frank W.Wise在物电学院四楼江苏省先进激光材料与器件重点实验室学术报告厅做了题为“ High-Performance Femtosecond Fiber Lasers Based on New Pulse Evolutions (基于新的脉冲演化过程的高性能飞秒光纤激光器)”的学术报告,报告会由先进激光材料与器件重点实验室副主任赵鹭明老师主持,物电学院部分领导老师及研究生参加并聆听了学术报告。

    报告内容:

 The femtosecond lasers that underlie ultrafast science and technology arebased on solitons, which are pulses that balance anomalous dispersion andnonlinearity. Solitons offer attractive features, but their energy islimited, and this limitation is particularly challenging in fiber lasers.Recently, a new class of pulses that form with normal dispersion has beenidentified. These are referred to as dissipative solitons. Short-pulsefiber lasers based on them generate pulses with 30 times the energy of priorfiber lasers, and much-higher energies may be possible. Dissipative-solitonlasers can exceed the performance of solid-state lasers while offering themajor practical benefits of the waveguide medium. Theoretical andexperimental results on dissipative-soliton lasers will be presented.Dissipative processes can also be used to stabilize self-similar evolutionof parabolic pulses (similaritons) in a laser. In contrast to dissipativesolitons, similaritons exhibit strong temporal and spectral breathing asthey traverse a laser. Similaritons are nonlinear attractors in gain fiber,and ways to exploit this property will be discussed.Dissipative-soliton and similariton lasers offer high performance withsimple designs, and so should have significant impact on short-pulse scienceand technology in the future.

作为超快科学和技术基础的飞秒激光器都是基于孤子理论的。产生的超短脉冲是反常色散和非线性效应平衡的结果。孤子具有很多优点,但它们的能量有限,而且这种对脉冲能量的限制在光纤激光器中尤为明显。最近,一类新的在正常色散中形成的脉冲得到证实。它们被归类为耗散孤子。基于耗散孤子的短脉冲光纤激光器可以产生高30倍以上的脉冲能量,甚至可以更高。耗散孤子激光器可以媲美固体激光器同时保持波导介质的优势。在本讲座中将讲述耗散孤子激光器的理论和实验结果。耗散过程也可以用来稳定激光器中抛物线型脉冲的自相似演变。不同于耗散孤子,自相似子是增益光纤中的非线性吸引子,关于这一点将在讲座中讨论。耗散孤子和自相似子激光器提供了优异的性能,同时保持简单结构,因此会对未来的短脉冲科学和技术产生重要影响。

报告人简介:

Frank Wise received a BS degree from Princeton University, a MS degree from the University of California at Berkeley, and a PhD from Cornell University. Before PhD studies at Cornell, he worked on advanced integrated circuits at Bell Laboratories. Since receiving the PhD in 1989, he has been on the faculty in Applied Physics at Cornell. His group has efforts in nonlinear pulse propagation and semiconductor nanostructures. Since 2002 his group has been working on fiber lasers. From 2007 to 2011 he was director of the School of Applied and Engineering Physics.

美国物理学会会士(Fellow of the American Physical Society);

美国光学学会会士(Fellow of the Optical Society of America);

发表论文200余篇,SCI他引接近万次。其中Science一篇、Nature Photonics一篇、Nature Nanotechnology一篇、Physical Review Letters 12篇。超快光学权威。研究方向包括超短脉冲源的发展和使用超短脉冲源测量超快现象等。
 


 

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