We have measured the ultrafast reset time of NbN superconducting single photon detectors (SSPDs) based on a design consisting of parallel superconducting stripes. Compared to a standard SSPD of identical active area, the parallel SSPD displays a similar detection efficiency and a kinetic inductance, which is divided by . For , the duration of the voltage detection pulse is reduced by nearly two orders of magnitude down to . The timing jitter associated with the rising front is only . These results open a way to efficient detectors with ultrahigh counting rate exceeding 1 GHz.
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