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Related Experiment Video

Updated: May 13, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

High-efficiency frequency conversion in the single-photon regime.

Alex S Clark1, Shayan Shahnia, Matthew J Collins

  • 1Centre for Ultrahigh bandwidth Devices for Optical Systems, Institute of Photonics and Optical Science, School of Physics, University of Sydney, Sydney, New South Wales, Australia. a.clark@physics.usyd.edu.au

Optics Letters
|March 19, 2013
PubMed
Summary
This summary is machine-generated.

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Researchers achieved near-unit efficiency for single-photon frequency conversion using Bragg-scattering four-wave mixing in a highly nonlinear fiber. This breakthrough enables efficient photon manipulation for quantum communication applications.

Area of Science:

  • Quantum optics
  • Nonlinear fiber optics
  • Photonics

Background:

  • Efficient frequency conversion of single photons is crucial for quantum information processing and communication.
  • Previous methods often suffered from low efficiency or required complex experimental setups.

Purpose of the Study:

  • To demonstrate high-efficiency single-photon frequency conversion using Bragg-scattering four-wave mixing.
  • To utilize commercially available dispersion-engineered highly nonlinear fiber for practical applications.

Main Methods:

  • Employed Bragg-scattering four-wave mixing in a 750 m long highly nonlinear fiber.
  • Utilized a weak coherent state with an average input of 0.27 photons per detection gate window.
  • Operated within the low-loss telecommunications band for all relevant frequencies.

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Last Updated: May 13, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Published on: June 8, 2018

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Main Results:

  • Achieved 99.1%±4.9% downconversion efficiency for single photons.
  • Achieved 98.0%±5.0% upconversion efficiency for single photons.
  • Demonstrated frequency conversion by 12 nm with near-unit efficiency.

Conclusions:

  • Bragg-scattering four-wave mixing in dispersion-engineered nonlinear fiber offers a highly efficient method for single-photon frequency conversion.
  • The demonstrated technique is compatible with existing telecommunications infrastructure.
  • This work paves the way for advanced quantum communication and computation systems.