Towards fully-fledged quantum and classical communication over deployed fiber with up-conversion module
arXiv:2106.05073 · doi:10.1002/qute.202000156
Abstract
Quantum key distribution (QKD), the distribution of quantum secured keys useful for data encryption, is expected to have a crucial impact in the next decades. However, although the notable achievements accomplished in the last twenty years, many practical and serious challenges are limiting the full deployment of this novel quantum technology in the current telecommunication infrastructures. In particular, the co-propagation of quantum signals and high-speed data traffic within the same optical fiber, is not completely resolved, due to the intrinsic noise caused by the high intensity of the classical signals. As a consequence, current co-propagation schemes limit the amount of classical optical power in order to reduce the overall link noise. However, this ad-hoc solution restrains the overall range of possibilities for a large-scale QKD deployment. Here, we propose and demonstrate a new method, based on up-conversion assisted receiver, for co-propagating classical light and QKD signals. In addition, we compare the performances of this scheme with an off-the-shelf quantum receiver, equipped with a standard InGaAs detector, over different lengths of an installed fiber link. Our proposal exhibits higher tolerance for noise in comparison to the standard receiver, thus enabling the distribution of secret keys in the condition of 4 dB-higher classical power.
arXiv comment13 figures
References in corpus (25)
- Advances in Quantum Cryptography
- Secure quantum key distribution with realistic devices
- Multidimensional quantum entanglement with large-scale integrated optics
- Secure quantum key distribution over 421 km of optical fiber
- High-dimensional quantum communication: benefits, progress, and future challenges
- A Fast and Compact Quantum Random Number Generator
- Provably-Secure and High-Rate Quantum Key Distribution with Time-Bin Qudits
- Quantum key distribution and 1 Gbit/s data encryption over a single fibre
- High-Dimensional Quantum Key Distribution based on Multicore Fiber using Silicon Photonic Integrated Circuits
- Integrating quantum key distribution with classical communications in backbone fiber network
- Coexistence of continuous variable QKD with intense DWDM classical channels
- Continuous-variable QKD over 50km commercial fiber
- Feasibility of quantum key distribution through dense wavelength division multiplexing network
- Quantum information processing with space-division multiplexing optical fibres
- Distribution of high-dimensional entanglement via an intra-city free-space link
- Finite-key analysis on the 1-decoy state QKD protocol
- Quantifying photonic high-dimensional entanglement
- In-field entanglement distribution over a 96 km-long submarine optical fibre
- Ultra fast quantum key distribution over a 97 km installed telecom fiber with wavelength-division multiplexing clock synchronization
- Efficient time-bin encoding for practical high-dimensional quantum key distribution
- Boosting the secret key rate in a shared quantum and classical fibre communication system
- Ultralow noise up-conversion detector and spectrometer at telecom band
- Experimental transmission of quantum digital signatures over 90-km of installed optical fiber using a differential phase shift quantum key distribution system
- Security proof for a simplified BB84-like QKD protocol
- Up-conversion single-photon detectors based on integrated periodically poled lithium niobate waveguides