Peng Junsong, Researcher and Doctoral Supervisor at State Key Laboratory of Precision Spectroscopy, East China Normal University, Recipient of the National Science Fund for Excellent Young Scholars.

Dr. Peng received his Ph.D. from Shanghai Jiao Tong University. Following his doctoral studies, he conducted postdoctoral research at the Royal Institute of Technology (KTH), Sweden, and Aston University, UK (2013-2016). He joined East China Normal University in 2016. He has been awarded the prestigious EU Marie Skłodowska-Curie Fellowship (2014) and the Shanghai Rising-Star Program (A Class) in 2020.

His research focuses on “Femtosecond Fiber Laser Physics and Technology”. When first encountering the term "femtosecond fiber laser," he imagined a large and complex device. However, upon visiting a lab and observing that femtosecond lasers could be generated simply by combining segments of hair-thin optical fibers, he developed a profound fascination with this system.

In recent years, he has developed novel measurement techniques that address the challenge of probing ultrafast processes in femtosecond lasers. This work has revealed several new types of ultrafast dynamic characteristics and their underlying physical mechanisms in femtosecond lasers. He has published over forty papers in SCI-indexed journals including Science Advances, Nature Communications, Laser & Photonics Reviews, Communications Physics, Physical Review Applied and Optics Letters.

His research achievements include: Capturing "breathing" laser dynamics, reported by the National Natural Science Foundation of China (NSFC) under the title "Scientists Capture 'Breathing' Laser for the First Time". Realizing distortion-free chirped pulse amplification based on self-similaritons (Nature Photonics). The Editor-in-Chief, Rachel Won, highlighted this work, stating: "Thanks to its linear chirp, self-similariton is an ideal seed light for chirped amplification systems." Resolving the fundamental scientific question of how mode-locking initiates in lasers. This work was selected as the cover of Communications Physics and featured as an Editor's Highlight by Nature China. Developing a field-autocorrelation technique praised by EU Physical Society President J. Dudley as having "A particular advantage" (Nature Reviews Physics1, 675 (2019)).Two of his publications were selected by Communications Physics among their "Highlighted papers" commemorating the 60th anniversary of the laser.

Personal Homepage:https://faculty.ecnu.edu.cn/_s29/pjs/main.psp