Optical transmitter tunable over a 65-nm wavelength range around 1550 nm for quantum key distribution

• URL: http://arxiv.org/abs/2310.11794v1
• Date: Wed, 18 Oct 2023 08:35:47 GMT
• Title: Optical transmitter tunable over a 65-nm wavelength range around 1550 nm for quantum key distribution
• Authors: B. Griffiths, Y. S. Lo, J. F. Dynes, R. I. Woodward, A. J. Shields
• Abstract summary: We propose and demonstrate an alternative quantum transmitter design consisting of a multimodal Fabry-Perot laser optically injection locked by a wavelength tunable laser. The transmitter is able to produce phase-controlled optical pulses at GHz speeds with a tunable wavelength range of >65nm centered at 1550nm.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The ability to create phase-controlled pulses of light with wavelength tunability has applications spanning quantum and classical communications networks. Traditionally, optical transmitters are able to either produce phase-controlled pulses at a fixed wavelength or require a chain of bulky and expensive external modulators to convert wavelength tunable continuous-wave light into optical pulses. One technology of great interest is quantum key distribution (QKD), a technology for generating perfectly random keys at remote nodes to ensure secure communications. Environments such as data centers, where the user needs change regularly, will require adaptability in the deployment of QKD to integrate into classical optical networks. Here we propose and demonstrate an alternative quantum transmitter design consisting of a multimodal Fabry-Perot laser optically injection locked by a wavelength tunable laser. The transmitter is able to produce phase-controlled optical pulses at GHz speeds with a tunable wavelength range of >65nm centered at 1550 nm. With this transmitter, we perform proof-of-principle QKD with secure bit rates of order Mb/s.

Related papers

• Tunable frequency conversion in doped photonic crystal fiber pumped near degeneracy [0.0]
  Future quantum networks will rely on the ability to coherently transfer optically encoded quantum information between different wavelength bands. We introduce a photonic crystal fiber with a germanium-doped core featuring group velocity matching at 1550 nm, the telecoms C-band, and 920 nm. Large lengths of this fiber are used to achieve nanometer-scale frequency shifts between wavelengths around 920 nm with up to 79.4% internal conversion efficiency.
  arXiv  Detail & Related papers  (2024-07-12T13:48:21Z)
• Polarization Purity and Dispersion Characteristics of Nested Antiresonant Nodeless Hollow-Core Optical Fiber at Near- and Mid-IR Wavelengths for Quantum Communications [3.9479376216271516]
  Hollow core fibers possess unparalleled polarization purity with minimal birefringence in the telecom wavelength range using continuous-wave (CW) laser light. Our results show a polarization extinction ratio between -30 dB and -70 dB across the 1520 to 1620 nm range in CW operation, peaking at -60 dB at the 2-mum design wavelength. Our findings highlight the potential of these fibers in emerging applications such as quantum key distribution (QKD) protocols.
  arXiv  Detail & Related papers  (2024-05-05T16:32:28Z)
• 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)
• High quality entanglement distribution through telecommunication fiber using near-infrared non-degenerate photon pairs [73.4643018649031]
  In urban environments, the quantum channel in the form of telecommunication optical fiber (confirming to ITU G.652D standards) are available. We investigate the possibility that for campus-type communications, entangled photons prepared in the Near-Infrared Range (NIR) can be transmitted successfully.
  arXiv  Detail & Related papers  (2022-09-09T03:23:11Z)
• Quantum-limited millimeter wave to optical transduction [50.663540427505616]
  Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
  arXiv  Detail & Related papers  (2022-07-20T18:04:26Z)
• High-efficiency microwave-optical quantum transduction based on a cavity electro-optic superconducting system with long coherence time [52.77024349608834]
  Frequency conversion between microwave and optical photons is a key enabling technology to create links between superconducting quantum processors. We propose a microwave-optical platform based on long-coherence-time superconducting radio-frequency (SRF) cavities. We show that the fidelity of heralded entanglement generation between two remote quantum systems is enhanced by the low microwave losses.
  arXiv  Detail & Related papers  (2022-06-30T17:57:37Z)
• GHz-Pulsed Source of Entangled Photons for Reconfigurable Quantum Networks [0.0]
  Entanglement is a universal resource in quantum networks, yet entangled photon sources are typically custom-made for a specific use case. Here, we report on a flexible source design that produces high-quality entanglement in continuous-wave and GHz-rate-pulsed operation modes.
  arXiv  Detail & Related papers  (2022-01-21T17:52:52Z)
• Spectral control of nonclassical light using an integrated thin-film lithium niobate modulator [5.119503410288866]
  We demonstrate frequency shifting and bandwidth compression of nonclassical light using an integrated thin-film lithium niobate (TFLN) phase modulator. We achieve record-high electro-optic frequency shearing of telecom single photons over terahertz range. Our results showcase the viability and promise of on-chip quantum spectral control for scalable photonic quantum information processing.
  arXiv  Detail & Related papers  (2021-12-18T16:38:00Z)
• Telecom-band Hyperentangled Photon Pairs from a Fiber-based Source [49.06242674127539]
  We experimentally demonstrate the generation of telecom-band biphotons hyperentangled in both the polarization and frequency DoFs. The states produced by our hyperentanglement source can enable protocols such as dense coding and high-dimensional quantum key distribution.
  arXiv  Detail & Related papers  (2021-12-06T21:37:43Z)
• A practical compact source of heralded single photons for simple detection LIDAR [0.0]
  Quantum technologies such as quantum sensing, quantum cryptography and quantum computation all utilize properties of non-classical light. A common route for obtaining heralded single photons is spontaneous four-wave mixing in optical fibers. Here we propose a cost-efficient, compact and mobile alternative.
  arXiv  Detail & Related papers  (2021-09-05T12:18:59Z)
• Stable Polarization Entanglement based Quantum Key Distribution over Metropolitan Fibre Network [55.41644538483948]
  We demonstrate a quantum key distribution implementation over deployed dark telecom fibers with polarisation-entangled photons generated at the O-band. One of the photons in the pairs are propagated through 10km of deployed fiber while the others are detected locally. This ensures continuous and stable QKD operation with an average QBER of 6.4% and a final key rate of 109 bits/s.
  arXiv  Detail & Related papers  (2020-07-04T02:36:57Z)

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.