Visualization of internal phase motions in femtosecond soliton molecules using orbital angular momentum (OAM)-resolved method
In person: 12 October 2021 • 17:05 - 17:20 China Standard Time
Soliton molecules, exhibiting similarities to molecular-like behavior, have attracted tremendous attention. With the dramatic recent advances in real time spectroscopic techniques as well as time-domain probes, the detailed nature of various soliton molecular has been revealed. Particularly, time-stretch dispersive Fourier transform (DFT) technique has been applied to unveil the complex internal dynamics of bound states. Nevertheless, the observation time frame of such technique is limited to hundreds of micro seconds mainly confined by the storage capability of the real time oscilloscopes, as well as by the number and the distribution of soliton pulses. Here, we experimentally demonstrate a new probing concept, orbital angular momentum (OAM)-resolved method, for visual extraction of long-term internal phase motions within soliton molecules produced by a mode locked laser.
Tianjin Univ. (China)
Jintao Fan is an associate professor in ultrafast laser lab in Tianjin University, China. Dr. Jintao Fan received his B.S. degree in electronic science and technology and the Ph.D. degree in optical engineering from Tianjin University, Tianjin, China, in 2013 and 2019, respectively. During his Ph.D. tenure, He got the Tianjin University Outstanding Doctoral Fund in 2017, won Marie S. Curie MULTIPLY fellowship in 2019 and the 16th Wang Daheng Optical Award for College Students in 2020 (Only 30 college students are selected in the field of optics per year). His research interests include optical parametric oscillators, amplifiers and structure beam generation. His thesis contains nonlinear dynamics of optical parametric process for the generation of few-cycle laser pulses. His contributions have been featured in several international journals, including IEEE Journal of Selected Topics in Quantum Electronics, Optics Letter and Optics Express.