Quantum Key Distribution With 1.25 Gbps Clock Synchronization

Abstract

We have demonstrated the exchange of sifted quantum cryptographic key over a 730 meter free-space link at rates of up to 1.0 Mbps, two orders of magnitude faster than previously reported results. A classical channel at 1550 nm operates in parallel with a quantum channel at 845 nm. Clock recovery techniques on the classical channel at 1.25 Gbps enable quantum transmission at up to the clock rate. System performance is currently limited by the timing resolution of our silicon avalanche photodiode detectors. With improved detector resolution, our technique will yield another order of magnitude increase in performance, with existing technology.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2004
Accession Number
ADA510676

Entities

People

  • A. J. Gross
  • A. Mink
  • A. Nakassis
  • B. J. Hershman
  • Carl J. Williams
  • Charles W. Clark
  • D. H. Su
  • E. W. Hagley
  • J. C. Bienfang
  • Jesse Wen
  • R. Lu
  • Xuming Tang

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Avalanche Photodiodes
  • Beam Splitting
  • Coding
  • Computers
  • Cryptography
  • Detection
  • Detectors
  • Field Programmable Gate Arrays
  • Measurement
  • Operating Systems
  • Optics
  • Optoelectronics
  • Photons
  • Quantum Bits
  • Quantum Cryptography
  • Quantum Key Distribution
  • Standards

Fields of Study

  • Physics

Readers

  • Image Processing and Computer Vision.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Radio communications and signal processing.

Technology Areas

  • Directed Energy
  • Quantum Computing
  • Quantum Science - Quantum Key Distribution
  • Space