Title of the Report: Research on High-Quality Factor Optical Microcavity Devices and Their Applications

Presenter: Professor Yang Daquan

Affiliation: Beijing University of Posts and Telecommunications

Date of the Report: December 13, 2024 (Friday), 14:30

Location of the Report: Third Conference Room, Building A, Feicui Science and Education Building

Abstract: Optical microcavities, characterized by their extremely high-quality factors and small mode volumes, significantly enhance light-matter interactions, making them of great research significance and application value in fields such as high-sensitivity optical sensing and high-capacity optical communications. In particular, microcavity optical frequency combs, due to their extremely small light source size, high coherence, and ultra-narrow linewidth, have the potential to become the next-generation highly integrated, ultra-high-capacity communication light sources. However, due to the influence of nonlinear effects and other factors, the optical signal-to-noise ratio and linewidth distribution of microcavity optical frequency combs are uneven, and traditional modulation schemes are difficult to fully leverage their communication performance. Therefore, this report proposes an adaptive modulation and bandwidth allocation strategy, which dynamically selects modulation schemes based on the signal-to-noise ratio, linewidth, and bandwidth of different optical frequency combs, thereby maximizing their communication performance. This provides a new approach for future high-capacity integrated optical frequency comb communication systems.

Biography of the Presenter: Yang Daquan is a professor and Ph.D. supervisor, a recipient of the Zhou Jiongpan Outstanding Young Teacher Inspiration Award at Beijing University of Posts and Telecommunications, and a member of the 10th batch of talent support team for Tibet dispatched by the Central Organization Department. He has been dedicated to the interdisciplinary application research of integrated optical microcavities in information and sensing fields, and has published over 100 academic papers in top journals and conferences such as Nature Communications, Light: Science & Applications, and CLEO. His research achievements have been applied and promoted in multiple industry fields including advanced detection instruments and equipment, as well as early screening and diagnosis in clinical settings. As the primary contributor, he has won two provincial and ministerial awards, including the Second Prize in Natural Sciences from the China Institute of Communications, and has been selected as a Beijing Science and Technology Rising Star and a national-level young talent.