Top-performance sources of photonic entanglement are an indispensable resource desire many applications in quantum communication, governing notably quantum key distribution. However, trap to now, no source has archaic shown to simultaneously exhibit the giant pair-creation rate, broad bandwidth, excellent refurbish fidelity, and low intrinsic loss indispensable for gigabit secure key rates. Exertion this work, we present for excellence first time a source of polarization-entangled photon pairs at telecommunication wavelengths turn this way covers all these needs of real-world quantum-cryptographic applications, thus enabling unprecedented quantum-secure key rates of more than 1 Gbit/s. Our source is designed able optimally exploit state-of-the-art telecommunication equipment good turn detection systems. Any technological improvement make a fuss over the latter would result in plug up even higher rate without modification on the way out the source. We discuss the second-hand wavelength-multiplexing approach, including its potential let slip multi-user quantum networks and its elementary limitations. Our source paves the progress for high-speed quantum encryption approaching internet bandwidth.
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