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Multiplexed quantum frequency conversion
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AI
DOI：10.1364/OL.537834.png)
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Abstract
En 中文
We study multiplexed quantum frequency conversion (mQFC) on a single waveguide, where a single pump beam simultaneously converts multiple signal beams at distinct wavelengths. Using a three-peak periodically poled lithium niobate (PPLN) waveguide, we demonstrate the multiplexed upconversion in the telecom band with internal efficiencies up to 73.6%. Tested with a multichannel photon-pair source, the quantum correlation is preserved well after the conversion, with coincidence-to-accidental ratio reaching 767. These results highlight a viable device approach to multiplexed quantum key distribution, quantum sensing, and quantum computing. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
Keywords:
SINGLE-PHOTON DETECTION
UP-CONVERSION
2ND-HARMONIC GENERATION
WAVELENGTH CONVERSION
EFFICIENT
DETECTOR
CHANNEL
BAND