High-time-resolved 64-channel single-flux quantum-based address encoder integrated with a multi-pixel superconducting nanowire single-photon detector

Superconducting nanowire single-photon detectors for quantum information

“…The readout in case of an SNSPD array is another key technology for array application because the detectors are operated at considerably low temperatures. Some inspiring results and studies have been recently observed [98,198]. For example, the first kilopixel SNSPDs with row-column multiplexing architecture were demonstrated in 2019 [98].…”

Kilopixel array of superconducting nanowire single-photon detectors

“…As pixel counts increase, direct readout becomes unfeasible due to the increasing heat load of high-speed cables and the limited cooling power of typical cryostats. Several architectures for cryogenic multiplexing of SNSPD arrays have been successfully demonstrated for array sizes up to 64 pixels [13], including row-column multiplexing [14], SFQ readout [15], pulse amplitude multiplexing [16], and frequency multiplexing [17]. Additionally, a delay-line based SNSPD imager has been demonstrated with ∼ 600 effective pixels [18].…”

Quantum Key Distribution with On‐Chip Dissipative Kerr Soliton

“…Wavelength division multiplexing (WDM) is an effective technique to increase the SKR in an end-to-end QKD system [14][15][16], or to route quantum signals in QKD networks [10,11]. The emerging achievements of integrated photonic QKD chips [17][18][19] and single photon detector arrays [20] exhibit the potential to integrate large-scale information transmitting and receiving units in very small scales.…”

“…Wavelength division multiplexing (WDM) is an essential technique in increasing the SKR in an end‐to‐end QKD system, and routing quantum signals in QKD networks . The emerging achievements of integrated photonic QKD chips, and single photon detector arrays have exhibited the potential to integrate high speed and large‐scale QKD transceivers on a single chip.…”