Amplitude multiplexing readout of an integrated autocorrelator

The realization of large-scale photonic circuits for quantum optics experiments requires an increasing number of integrated detectors. Superconducting nanowire single photon detectors (SNSPDs) can be easily integrated on chip to efficiently detect the light propagating inside waveguides. In this paper, we propose and implement a novel amplitude-multiplexing scheme allowing the efficient readout of several SNSPDs with only one coaxial cable.