Study on noise reduction in up-conversion single photon detectors

Lijun Ma, Oliver Slattery, Xiao Tang, Ronald E. Meyers, Yanhua Shih, Keith S. Deacon
2010 Quantum Communications and Quantum Imaging VIII  
Up-conversion single photon detector technology has become efficient for photons in the near infrared range. However, its dark count rate is a major concern for some applications in quantum optics. We have theoretically and experimentally studied the causes of dark counts, and developed an up-conversion detector with an ultra low dark count rate. A reduced dark count rate of only 320 counts per second is achieved at the maximum overall detection efficiency of 18% and a dark count rate of less
more » ... ount rate of less than 100 counts per second is achieved at a detection efficiency of 10%. The ultra low dark count rate enables this type of up-conversion detector to be utilized in a variety of applications where weak signals in the near IR region are only at a level of few thousand photons per second.
doi:10.1117/12.859272 fatcat:modsmrquevfuhdnzyz2wpp2cei