First demonstration of a broadband 37-cell hollow core photonic bandgap fiber and its application to high capacity mode division multiplexing. - Yongmin Jung; Vincent A. J. M. Sleiffer; Naveen K. Baddela; Marco N. Petrovich; John R. Hayes; Natalie V. Wheeler; David R. Gray; E. Numkam Fokoua; John P. Wooler; Nicholas Heng-Loong Wong; Francesca Parmigiani; Shaif-Ul Alam; et al. (OFC/NFOEC, 2013)