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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
Summary
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.
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.
