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Updated: Nov 21, 2025
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Single-photon frequency shifting with a quadrature phase-shift keying modulator
Changchen Chen1, Jane E Heyes2, Jeffrey H Shapiro2
1Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA. chencc@mit.edu.
Scientific Reports
|January 12, 2021
Summary
Researchers demonstrate precise frequency control of single photons using a commercial modulator, enhancing quantum communication and networks. This method improves quantum interference visibility, crucial for advanced quantum technologies.
Area of Science:
- Quantum optics
- Quantum information science
- Photonics
Background:
- Deterministic frequency manipulation of single photons is critical for quantum communications and networks.
- Existing methods may lack efficiency or accessibility for practical applications.
Purpose of the Study:
- To demonstrate a simple and effective method for frequency shifting single photons.
- To showcase the utility of this frequency shifter in quantum photonic experiments.
Main Methods:
- Utilized a commercially available quadrature phase-shift keying modulator for frequency manipulation.
- Applied the modulator to both classical and nonclassical light sources.
- Measured the spectral properties of the frequency-shifted photons, including carrier-to-sideband ratio.
Main Results:
- Achieved a deterministic frequency shift of 15.65 GHz for single photons.
- Measured a high carrier-to-sideband ratio of 30 dB for the frequency-shifted photons.
- Improved Hong-Ou-Mandel quantum interference visibility from 62.7% to 89.1% by correcting spectral overlap.
Conclusions:
- The demonstrated frequency shifter is a practical tool for quantum photonics.
- This technique enhances the performance of quantum interference experiments.
- The method holds promise for advancing quantum communication and network technologies.
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