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We demonstrate a down-conversion-based twin photon source pumped by a 10 GHz repetition-rate-tunable comb laser at 1553 nm wavelength. We show high Hong-Ou-Mandel interference visibilities, which are free from the pump-power induced degradation.
In order to solve multi access interference (MAI) effect of multi-user blind detection in underwater acoustic communication networks, blind adaptive multi-user detection method based on improved Kalman filter algorithm was proposed. This method can suppress the MAI problem when the user number increases. Simulation was done for both traditional Kalman method and improved Kalman method in synchronous...
A high-speed quantum key distribution system with the wavelength-division multiplexing was demonstrated in 12hour continuous operation. We achieved a secure key rate of 208 kbps through a 45-km field fiber with 14.5-dB loss.
We have developed a practical superconducting nanowire single photon detector (SNSPD) system with our superconducting thin films and devices fabrication, optical coupling packaging, and cryogenic technology. The SNSPD devices were fabricated from high-quality niobium nitride (NbN) ultra-thin films that were epitaxially grown on single-crystal MgO substrates, and optical cavity structure were applied...
We have developed a robust, BB84, 850 nm wavelength, gigahertz clock, phase encoding quantum key distribution system. This has been analyzed using a number of single-photon detectors and tested against predictions from our theoretical model.
Intrusion Detection System (IDS) through collecting and analyzing information from network and Host to check whether there are some signs about attack. Network-based Intrusion Detection System for Virtual Machine Environment is a novel approach to implement the traditional network-based IDS in virtual machine environment. The paper get the network packets from the virtual bridge which is a virtual...
We report a development of a multi-channel superconducting nanowire single photon detector system, which showed the high detection efficiency over 10% at 100 Hz dark count rate and the wavelength of 1550 nm.
Recent progress in quantum key distribution (QKD), regarding high-speed and long-distance experiments and field trials are briefly reviewed. We also introduce our research on the randomness of quantum key. We have confirmed a quantum key, as a crypto key, assures the required randomness with some dynamic compensation.
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