Long-distance transmission of quantum key distribution coexisting with classical optical communication over weakly-coupled few-mode fiber

• URL: http://arxiv.org/abs/2002.00420v1
• Date: Sun, 2 Feb 2020 15:58:36 GMT
• Title: Long-distance transmission of quantum key distribution coexisting with classical optical communication over weakly-coupled few-mode fiber
• Authors: Bi-Xiao Wang, Yingqiu Mao, Lei Shen, Lei Zhang, Xiao-Bo Lan, Dawei Ge, Yuyang Gao, Juhao Li, Yan-Lin Tang, Shi-Biao Tang, Jun Zhang, Teng-Yun Chen and Jian-Wei Pan
• Abstract summary: Quantum key distribution (QKD) is one of the most practical applications in quantum information processing. We present for the first time a QKD implementation coexisting with classical optical communication over weakly-coupled FMF. Co-propagation of QKD with one 100 Gbps classical data channel at -2.60 dBm launched power is achieved over 86 km FMF with 1.3 kbps real-time secure key generation.
• Score: 13.259161549224265
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum key distribution (QKD) is one of the most practical applications in quantum information processing, which can generate information-theoretical secure keys between remote parties. With the help of the wavelength-division multiplexing technique, QKD has been integrated with the classical optical communication networks. The wavelength-division multiplexing can be further improved by the mode-wavelength dual multiplexing technique with few-mode fiber (FMF), which has additional modal isolation and large effective core area of mode, and particularly is practical in fabrication and splicing technology compared with the multi-core fiber. Here, we present for the first time a QKD implementation coexisting with classical optical communication over weakly-coupled FMF using all-fiber mode-selective couplers. The co-propagation of QKD with one 100 Gbps classical data channel at -2.60 dBm launched power is achieved over 86 km FMF with 1.3 kbps real-time secure key generation. Compared with single-mode fiber, the average Raman noise in FMF is reduced by 86% at the same fiber-input power. Our work implements an important approach to the integration between QKD and classical optical communication and previews the compatibility of quantum communications with the next-generation mode division multiplexing networks

Related papers

• Energy-time Entanglement Coexisting with Fiber Optical Communication at Telecom C-band [11.687749207950633]
  coexistence of quantum and classical light in the same fiber link is extremely desired in developing quantum communication. We demonstrate the coexistence of energy-time entanglement based QKD and fiber optical communication at the telecom C-band.
  arXiv  Detail & Related papers  (2023-05-30T02:41:06Z)
• Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
  Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols. We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
  arXiv  Detail & Related papers  (2023-04-24T15:43:08Z)
• Two-mode squeezing over deployed fiber coexisting with conventional communications [55.41644538483948]
  Multi-mode squeezing is critical for enabling CV quantum networks and distributed quantum sensing. To date, multi-mode squeezing measured by homodyne detection has been limited to single-room experiments. This demonstration enables future applications in quantum networks and quantum sensing that rely on distributed multi-mode squeezing.
  arXiv  Detail & Related papers  (2023-04-20T02:29:33Z)
• High-rate sub-GHz linewidth bichromatic entanglement source for quantum networking [59.191830955730346]
  In this work, we study an entanglement source based on four-wave mixing in a diamond configuration in a warm rubidium vapor. We are able to achieve in-fiber entangled pair generation rates greater than $107, /s$, orders of magnitude higher than previously reported atomic sources.
  arXiv  Detail & Related papers  (2023-04-11T21:19:30Z)
• Twin-field quantum key distribution without phase locking [18.013181607967322]
  We show an approach to recover the single-photon interference pattern and realize TF-QKD emphwithout phase locking. Our work provides a scalable and practical solution to TF-QKD, thus representing an important step towards its wide applications.
  arXiv  Detail & Related papers  (2022-12-08T15:03:12Z)
• High-dimensional quantum key distribution using energy-time entanglement over 242 km partially deployed fiber [8.905152890117282]
  Entanglement-based quantum key distribution (QKD) is an essential ingredient in quantum communication. We report an experimental QKD using energy-time entangled photon pairs that transmit over optical fibers of 242 km. We generate secure keys with secure key rates of 0.22 bps and 0.06 bps in and finite-size regime.
  arXiv  Detail & Related papers  (2022-12-06T01:37:57Z)
• The limits of multiplexing quantum and classical channels: Case study of a 2.5 GHz discrete variable quantum key distribution system [0.0]
  We study the performance of a system running a simplified BB84 protocol at 2.5 GHz repetition rate. We discuss the performance of an ideal system under the same conditions. In this scenario we could exchange a secret key with a launch power up to 16.7 dBm in the classical channels.
  arXiv  Detail & Related papers  (2021-09-06T12:52:58Z)
• Towards fully-fledged quantum and classical communication over deployed fiber with up-conversion module [47.187609203210705]
  We propose and demonstrate a new method, based on up-conversion assisted receiver, for co-propagating classical light and QKD signals. 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  Detail & Related papers  (2021-06-09T13:52:27Z)
• Characterization and stability measurement of deployed multicore fibers for quantum applications [50.591267188664666]
  We characterize for the first time, in terms of phase stability, multiple strands of a 4-core multicore fiber installed underground in the city of L'Aquila. We investigate the possibility of using such an infrastructure to implement quantum-enhanced schemes, such as high-dimensional quantum key distribution, quantum-based environmental sensors.
  arXiv  Detail & Related papers  (2021-03-11T18:24:59Z)
• Path-encoded high-dimensional quantum communication over a 2 km multicore fiber [50.591267188664666]
  We demonstrate the reliable transmission over a 2 km long multicore fiber of path-encoded high-dimensional quantum states. A stable interferometric detection is guaranteed, allowing for low error rates and the generation of 6.3 Mbit/s of secret key rate.
  arXiv  Detail & Related papers  (2021-03-10T11:02:45Z)
• Coherent phase transfer for real-world twin-field quantum key distribution [0.0]
  We develop a solution for the simultaneous key streaming and channel length control, and demonstrate it on a 206 km field-deployed fiber with 65 dB loss. Our technique reduces the quantum-bit-error-rate contributed by channel length variations to 1%, representing an effective solution for real-world quantum communications.
  arXiv  Detail & Related papers  (2020-12-30T15:40:07Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.