Generation rate scaling: the quality factor optimization of microring resonators for photon-pair sources

• DOI: 10.1364/prj.6.000587
• Publication Date: 2018-05-22T18:41:14Z
• Authors: Kai Guo; Xiaodong Shi; Xiaolin Wang; Junbo Yang; Yunhong Ding; Haiyan Ou; Yijun Zhao
• Keywords: Q factor; Four-wave mixing

To achieve photon-pair generation scaling, we optimize the quality factor of microring resonators for efficient continuous-wave-pumped spontaneous four-wave mixing.Numerical studies indicate that a high intrinsic makes pair rate and brightness possible, in which maximums take place under overcoupling critical-coupling conditions, respectively.We fabricate six all-pass-type resonator samples on silicon-on-insulator chip involving gap width as only degree freedom.The signal count rate, brightness, coincidence all are characterized, then compared with modified simulations by taking detector saturation nonlinear loss into account.Being experimentally validated first time to best our knowledge, this work explicitly demonstrates reducing round-trip ring cavity designing corresponding optimized more effective generate high-rate or high-brightness photon pairs than conventional strategy simply increasing factor.