Integrated four-channel all-fiber up-conversion single-photon-detector with adjustable efficiency and dark count

Up-conversion single photondetector (UCSPD) has been widely used in many research fields includingquantum key distribution, lidar, optical time domain reflectrometry, and deep space communication. For the first time in laboratory, we have developed an integrated four-channel all-fiber UCSPD which can work in both free-running and gate modes. This compact module can satisfy different experimental demands with adjustabledetection efficiency and dark count. We have characterized the key parameters of the UCSPDsystem.
Source: Review of Scientific Instruments - Category: Physics Authors: Source Type: research