题　目：Optical frequency combs and free space data transmission using quantum cascade lasers at 10 µm

报告人：Carlo Sirtori

单　位：Ecole normale supérieure Paris, France

主持人：胡梦云

时　间：11月21日（周五）下午15:00-15:40

地　点：光学大楼A508会议室

报告内容简介：

I will begin by discussing the fundamental physical concepts underlying quantum lasers and in particular the optical.

Next, I will present the origin of frequency-modulated (FM) mode-locking in quantum cascade (QC) lasers and illustrate the multi-heterodyne setup used to retrieve the temporal evolution of the laser emitted electric field.

Finally, I will describe the operation of unipolar quantum optoelectronic (UQO) devices, which enable high-speed free-space optical communication systems operating at a wavelength of 10 µm. These devices operate at room temperature and are integrated into metasurfaces for enhanced performance. Data transmission rates exceeding 60 Gbit/s have been achieved using UQO devices together with standard telecom coding schemes and equalization techniques.

报告人简介：

After completing his PhD in Milan, Carlo Sirtori moved to Bell Laboratories (NJ, USA) in 1990 working on the quantum properties of low dimensional semiconductor quantum structures. During the year at Bell Labs he made some major contribution such as the first demonstration of the “Quantum Cascade Laser”. In 1998 he joined THALES Research & Technology in France, where he was a group leader and then head of the "Semiconductor Lasers" department. After a few years of experience as a manager, he took an academic position to focus his research on quantum physics and technology. In 2003 he was appointed professor at the University Paris-Diderot where he was director of the MPQ laboratories from 2010 until 2018. The same year he left the University to join, Ecole normale supérieure (Paris) as professor, holder of the ENS-THALES Chair and director of the Master Quantum Engineering.