飞秒掺镱光纤激光器的功率测量 Power scaling of femtosecond Yb-fiber lasers

报告摘要：

飞秒掺镱光纤激光器已经在频率计量、高次谐波的产生、精密加工、多光子显微成像技术等方面得到许多重要应用。本讲座将介绍高功率掺镱光纤激光器系统中的关键超快激光技术，主要讨论一些关键使能设备（例如LMA光纤，啁啾体积布拉格光栅）和不同的扩增技术（例如，啁啾脉冲放大和预啁啾管理扩增）。

Femtosecond Yb-fiber laser have found many important applications such as frequency metrology, high harmonic generation, precision machining, multi-photon microscopy imaging. This talk will discuss key ultrafast laser technologies in implementing high-power Yb-fiber laser system. We will discuss key enabling devices (e.g., LMA fiber, chirped volume Bragg grating) and different amplification techniques (e.g., chirped pulse amplification and pre-chirp managed amplification).

报告人介绍：

常国庆研究员，取得清华大学电子工程系学士和硕士学位、密歇根大学超快光学中心电子工程系博士学位，曾任麻省理工学院电子研究实验室研究员，现为汉堡（德国）自由电子激光科学中心（CFEL）亥姆霍兹青年科学家小组“超快光纤光学”下超快光学和X射线分部的负责人。主要从事高功率超快光纤激光器（例如激光器件、振荡器、放大器等）、超快非线性光学和用于天文光谱仪精度校准的飞秒频率梳等方面的研究，旨在突破超快激光技术的限制，并将其应用在基于实验室的EUV/X 射线源、中红外光谱频率梳、腔增强超快非线性光学和多光子显微技术等课题中。

Guoqing Chang graduated with both Bachelor and Master degrees from Electronics Engineering department of Tsinghua University and Ph.D. degree in Electrical Engineering from the Center for Ultrafast Optical Science at the University of Michigan. After staying at the University of Michigan as a postdoctoral research fellow for about one year, he joined the Research Laboratory of Electronics at Massachusetts Institute of Technology as a postdoctoral research associate. In August 2012, he moved to the Center for free electron laser (CFEL) at Hamburg (Germany) as the head of the Helmholtz Young investigator group “Ultrafast Fiber Optics” under the ultrafast optics and X-Rays division. His research has focused on high-power ultrafast fiber lasers (e.g., laser device, oscillator, amplifier, etc.), ultrafast nonlinear optics and femtosecond frequency combs for precision calibration of astronomical spectrographs. At CFEL, his research group aims to pushing the limits of ultrafast laser technologies and apply them to explore broader topics, such as laboratory-based EUV/X-ray source, mid-IR frequency combs for spectroscopy, cavity enhanced ultrafast nonlinear optics, and multi-photon microscopy.