Aug 2, 2024

Title: A quantum perspective of Kerr microcombs

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Speaker: Prof. Qifan Yang

                Peking University, China

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Abstract:

An optical frequency comb is a cluster of equally spaced lasers providing a coherent bidirectional link between optical and microwave signals. The realization of these combs in optical microresonators, particularly those generated through Kerr nonlinearities, offers a chip-based solution for numerous applications ranging from precision metrology to telecommunications. While the dynamics of these Kerr microcombs are well-described by the classical Lugiato-Lefever equations, their quantum nature has often been overlooked. In this talk, I will present our recent studies of quantum effects in Kerr microcombs, including quantum-limited timing noise in bright soliton and dark pulse microcombs, as well as protocols to surpass these limits. We also correlated non-classical light in Kerr microresonators, resulting in the largest-scale entanglement on photonic chips to date.

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Biography:

Prof. Qifan Yang received his B. Sc in Physics from Peking University in 2013, and Ph. D. in Applied Physics from Caltech in 2019. He worked as a postdoctoral scholar in Caltech before he joined School of Physics, Peking University in 2020, where he is presently an assistant professor in Physics. His research interests span integrated photonics and nonlinear optics to high-Q microresonators and optical frequency combs.