Frequency multiplexing for quasi-deterministic heralded single-photon sources

Nature Communications
Chaitali JoshiAlexander L Gaeta

Abstract

Parametric single-photon sources are well suited for large-scale quantum networks due to their potential for photonic integration. Active multiplexing of photons can overcome the intrinsically probabilistic nature of these sources, resulting in near-deterministic operation. However, previous implementations using spatial and temporal multiplexing scale unfavorably due to rapidly increasing switching losses. Here, we break this limitation via frequency multiplexing in which switching losses remain fixed irrespective of the number of multiplexed modes. We use low-noise optical frequency conversion for efficient frequency switching and demonstrate multiplexing of three modes. We achieve a generation rate of 4.6 × 104 photons per second with an ultra-low g(2)(0) = 0.07 indicating high single-photon purity. Our scalable, all-fiber multiplexing system has a total loss of just 1.3 dB, such that the 4.8 dB multiplexing enhancement markedly overcomes switching loss. Our approach offers a promising path to creating a deterministic photon source on an integrated chip-based platform.

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Citations

Jul 18, 2019·Nature Communications·Avik DuttShanhui Fan
Nov 25, 2018·Optics Express·Eyal BaharJeffrey Moses
May 2, 2020·Physical Review Letters·Xiaoyue DingJeffrey Moses
May 3, 2020·The Review of Scientific Instruments·Evan Meyer-ScottAlan Migdall
Aug 7, 2019·Physical Review Letters·David L HurstPieter Kok
Oct 1, 2019·Optics Letters·Aron VanselowSven Ramelow
Aug 19, 2018·Optics Express·J B ChristensenK Rottwitt
Apr 28, 2020·Physical Review Letters·Chaitali JoshiAlexander L Gaeta
Feb 27, 2021·Physical Review Letters·H OllivierP Senellart
Apr 25, 2021·Nature Communications·Siddharth BuddhirajuShanhui Fan
Jun 26, 2021·Physical Review Letters·S E ThomasP Senellart
Jun 16, 2021·Optics Letters·Serge Massar, Stéphane Clemmen
Nov 26, 2019··Alexander GaetaAlessandro Farsi
Oct 19, 2020··Shigehito MikiNobuyuki Imoto

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