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Updated: Aug 19, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Ultratunable Quantum Frequency Conversion in Photonic Crystal Fiber.

K A G Bonsma-Fisher1, P J Bustard1, C Parry2

  • 1National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada.

Physical Review Letters
|December 3, 2022
PubMed
Summary
This summary is machine-generated.

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Researchers achieved quantum frequency conversion for single photons across an ultrabroad wavelength range using a novel photonic crystal fiber. This breakthrough advances quantum networking capabilities by enabling flexible photon manipulation for future quantum networks.

Area of Science:

  • Quantum optics
  • Photonics
  • Quantum information science

Background:

  • Quantum frequency conversion (QFC) is crucial for building scalable quantum networks.
  • Existing QFC methods often lack the broad wavelength tunability required for diverse quantum applications.

Purpose of the Study:

  • To demonstrate ultrabroadband quantum frequency conversion of single photons.
  • To enable wavelength tunability for single photons within a photonic crystal fiber (PCF).

Main Methods:

  • Utilized a group-velocity-symmetric photonic crystal fiber for quantum frequency conversion.
  • Employed a single pump laser to control the target output wavelength.
  • Characterized the conversion efficiency and photon statistics of the converted light.

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Last Updated: Aug 19, 2025

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Main Results:

  • Achieved QFC of heralded 1551 nm photons to an ultrabroadband range (1226-1408 nm), covering over 150 frequency bins.
  • Demonstrated internal and total conversion efficiencies of 12(1)% and 1.4(2)%, respectively.
  • Measured a heralded second-order intensity correlation function g(2)(0) of 0.25(6) for converted photons.

Conclusions:

  • The developed PCF enables flexible, ultrabroadband quantum frequency conversion of single photons.
  • This technology is a significant enabler for various quantum networking tasks and applications.
  • The demonstrated method offers precise control over the converted photon wavelength.