Abstract:
Kerr optical frequency combs are multimode states of light generated via a third-order optical nonlinearity in an optical resonator. When a Kerr resonator is pumped weakly, spontaneous parametric processes populate resonator modes in pairs. In this regime, Kerr combs can be a quantum resource for the generation of single photons and energy-time entangled pairs, multiphoton entangled states, and squeezed vacuum. When pumped more strongly, the parametric gain can exceed the resonator loss and give rise to optical parametric oscillation and bright comb formation. The modes of a Kerr comb can become phase-locked to form stable, low-noise dissipative Kerr solitons. This regime of Kerr comb operation has become the foundation of multiple technologies, including comb-based spectroscopy, LiDAR, optical frequency synthesizers, and optical processors. In this talk, I will give a brief review on the quantum optical frequency combs and soliton microcombs; I will also introduce our recent works in this intriguing field.
Biography:
Dr. Guangqiang He, professor and doctoral supervisor of the State Key Laboratory of Regional Optical Fiber Communication Networks and New Optical Communication Systems, Department of Electronic Engineering, Shanghai Jiao Tong University. He graduated from the Department of Electronic Engineering at Shanghai Jiao Tong University in 2006 with a Ph.D. in Communication and Information Systems. From May 2009 to May 2010, he visited the Optical Center and Department of Physics and Astronomy at the University of Rochester in the United States. Currently, he is a senior member of the Optical Society of America (OSA) and a member of the Institute of Electrical and Electronics Engineers (IEEE) in the United States.
As the project leader, he has led three projects funded by the National Natural Science Foundation of China, two projects funded by the National High tech Research and Development Program (863 Program), and one project funded by the Guangdong Province Key Field Research and Development Program. He has published over 80 journal articles in journals such as Physical Review A/B/Applied, Photonics Research, Advanced Optical Materials, Optics Letters, Optics Express, Nanophotonics, etc. and was indexed by SCI with over 70 articles. He has also obtained 13 authorized national invention patents.
Seminar by the NYU-ECNU Institute of Physics at NYU Shanghai