Yu Fei is a research fellow at the Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS). In 2014, he graduated from the Centre for Photonics and Photonic Materials (CPPM), Department of Physics, University of Bath, UK. His doctoral supervisor is Prof. Jonathan C. Knight, the inventor of photonic crystal fibers. In March 2018, under the Talent Program sponsored by CAS, he was introduced from overseas to SIOM to engage in the research of hollow-core photonic crystal fibers (HC-PCFs). With main research on the design, preparation and application of silica microstructured optical fibers, he is one of the earliest scholars engaged in the research of the anti-resonant hollow-core fiber (AR-HCF) in the world. His research in low-loss and silica-based anti-resonant hollow-core fibers (2012), mid-infrared acetylene gas fiber lasers based on hollow-core fibers (2016), and hollow-core fibers with anti-photo-darkening and deep-ultraviolet laser energy transmission (2018) have been covered by many domestic and foreign media, including Spotlight and Optics & Photonics of the Optical Society of America (OSA ), and Optics.org, LaserFocusWorld, and Phys.org of Society of Photo-Optical Instrumentation Engineers (SPIE). Since 2012, he has published 44 journal papers, with an h-index of 17 on Google Scholar.