Superconducting nanowire single-photon detector arrays for deep space optical communication ground receivers

With their high timing resolution, high detection efficiency, and large dynamic range, Superconducting Nanowire Single-Photon Detectors (SNSPDs) are the ideal detectors for deep-space optical communication ground receivers. JPL has fabricated SNSPD detectors for four ground stations and fielded full detector systems at three of them as part of the upcoming Deep Space Optical Communication, RF/Optical Hybrid, and Optical to Orion projects. In this presentation, I will discuss the current status of these different detector systems and the technological advances that made them possible. I will also discuss the future improvements in SNSPD arrays necessary for next-generation optical communication ground stations.