Designed a multi-channel photonic mixing system based on cascade carrier suppression, which can achieve frequency conversions simultaneously for multi-channels, effectively inhibit the generation of third-order intermodulation, and significantly reduce the insertion loss in the conversion process. Meanwhile, a simulation with the software Optisystem has been done, indicating excellent frequency-conversion characteristics and good scalability of this scheme, that shows the microwave photonic frequency conversion can be a potential application for microwave signal parallel processing.
We propose a scheme of BB84 quantum key distribution (QKD) with a triggered parametric down-conversion (PDC)
source. According to different results of Alice's measurement using a photon number resolving (PNR) detector, we
separate photon pulses into three sets to implement the passive decoy method. Performances of two different kinds of
widely-used PNR detectors, TES and TMD, are investigated by simulation. With the parameters of PNR detectors
nowadays, TES and TMD perform similarly. Both of them can improve the secure transmission distance up to 171 km.
Furthermore, compared with the case using threshold detectors, this scheme can achieve a higher key generation rate.