Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

Spatial Multiplexing of High-Purity Heralded Single Photons in an Integrated Fibre Architecture

Robert J. A. Francis-Jones, Rowan A. Hoggarth, Peter J. Mosley

Published Jan 1, 2016• 1 citation
Publisher

Abstract

We present the construction and characterisation of a spatially multiplexed photonic crystal fibre source of high-purity heralded single photons at 1560nm. We demonstrate performance improvements from multiplexing two sources.
DOI
10.1364/cleo_qels.2016.fth1c.3

Related papers

Resource-efficient fibre-integrated temporal multiplexing of heralded single photons

Rowan A. Hoggarth, Robert J. A. Francis-Jones, Peter J. Mosley

We present a multiplexed single photon source that re-synchronises heralded single photons generated by four-wave mixing in photonic crystal fibre using a fibre delay loop controlled by a single switch. By combining the probabilities of generating heralded single photons on four consecutive pump pulses we obtain an enhancement of the per-bin single-photon delivery probability. Our source demonstrates a way in which single-photon source multiplexing may be carried out with minimised resource overhead while retaining the benefits of a robust and alignment-free platform.

arXiv:1706.01838•Journal of Optics•Nov 2, 2017•24 citations

All-fibre multiplexed source of high-purity heralded single photons

Robert J. A. Francis-Jones, Rowan A. Hoggarth, Peter J. Mosley

Single photon sources based on spontaneous photon-pair generation have enabled pioneering experiments in quantum optics. However, their non-determinism presents a bottleneck to scaling up photonic and hybrid quantum-enhanced technologies. Furthermore, photon pairs are typically emitted into many correlated frequency modes, producing an undesirable mixed state on heralding. Here we present a complete fibre-integrated heralded single photon source that addresses both these difficulties simultaneously. We use active switching to provide a path to deterministic operation by multiplexing separate spontaneous sources, and dispersion engineering to minimise frequency correlation for high-purity single photon generation. All the essential elements -- nonlinear material with dispersion control, wavelength isolation, optical delay, and fast switching -- are incorporated in a low-loss alignment-free package that heralds photons in telecoms single-mode fibre. Our results demonstrate a scalable approach to delivering pure single photons directly into guided-wave photonic devices.

arXiv:1603.06260•Mar 20, 2016•2 citations

Integrated Spatial Multiplexing of Photonic Crystal Waveguide Heralded Single-Photon Sources

Matthew J. Collins, Chunle Xiong, Isabella H. Rey +8 more

We experimentally demonstrate spatial multiplexing of monolithic heralded single photon sources based on slow-light enhanced spontaneous four-wave mixing. We use a low-loss integrated electro-optic switch to achieve a net gain in the heralded single-photon rate.

Nonlinear Optics•Jan 1, 2013•0 citations

Integrated spatial multiplexing of heralded single-photon sources

Matthew J. Collins, Chunle Xiong, Isabella H. Rey +8 more

The non-deterministic nature of photon sources is a key limitation for single-photon quantum processors. Spatial multiplexing overcomes this by enhancing the heralded single-photon yield without enhancing the output noise. Here the intrinsic statistical limit of an individual source is surpassed by spatially multiplexing two monolithic silicon-based correlated photon pair sources in the telecommunications band, demonstrating a 62.4% increase in the heralded single-photon output without an increase in unwanted multipair generation. We further demonstrate the scalability of this scheme by multiplexing photons generated in two waveguides pumped via an integrated coupler with a 63.1% increase in the heralded photon rate. This demonstration paves the way for a scalable architecture for multiplexing many photon sources in a compact integrated platform and achieving efficient two-photon interference, required at the core of optical quantum computing and quantum communication protocols. Photonic quantum technologies will require efficient single-photon sources and spatial multiplexing has been explored as a route to achieve this. Here, the authors present a scheme to integrate several single-photon sources using spatial multiplexing for on-chip applications at telecommunications wavelengths.

arXiv:1305.7278•Nature Communications•Oct 10, 2013•297 citations

Photonic crystal fibre-based source of heralded single photons with high mode purity and efficiency

Liang Cui, Cheng Guo, Xiaoying Li

We demonstrate and characterize a heralded single photon source which is based on the signal and idler photon pairs generated from pulse pumped spontaneous four wave mixing in photonic crystal fibre. The heralded single photons are approximately in a pure temporal mode, achieved by eliminating the frequency correlation of the photon pairs. Since the influence of Raman scattering is negligible and no narrow bandpass filter is employed, the heralding efficiency of the source is up to 85%. When the production rate is 0.002 pair/pulse, the measured second-order intensity correlation function of the heralded single photons is , which is suppressed by a factor of more than 80 relative to the classical Poissonian light limit. In addition, the demonstrated source is pumped by a photonic crystal fibre laser, which makes the source more compact and low-cost.

Journal of Modern Optics•Nov 1, 2013•2 citations

Spatial multiplexing of monolithic Silicon heralded single photon sources

Matthew J. Collins, Chunle Xiong, Trung D. Vo +8 more

Here we present the first experimental demonstration of spatial multiplexing of two integrated heralded single photon sources so as to enhance the heralded photon rate for a given single waveguide output power.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•May 1, 2013•1 citation
We present a multiplexed single photon source that re-synchronises heralded single photons generated by four-wave mixing in photonic crystal fibre using a fibre delay loop controlled by a single switch. By combining the probabilities of generating heralded single photons on four consecutive pump pulses we obtain an enhancement of the per-bin single-photon delivery probability. Our source demonstrates a way in which single-photon source multiplexing may be carried out with minimised resource overhead while retaining the benefits of a robust and alignment-free platform.
Single photon sources based on spontaneous photon-pair generation have enabled pioneering experiments in quantum optics. However, their non-determinism presents a bottleneck to scaling up photonic and hybrid quantum-enhanced technologies. Furthermore, photon pairs are typically emitted into many correlated frequency modes, producing an undesirable mixed state on heralding. Here we present a complete fibre-integrated heralded single photon source that addresses both these difficulties simultaneously. We use active switching to provide a path to deterministic operation by multiplexing separate spontaneous sources, and dispersion engineering to minimise frequency correlation for high-purity single photon generation. All the essential elements -- nonlinear material with dispersion control, wavelength isolation, optical delay, and fast switching -- are incorporated in a low-loss alignment-free package that heralds photons in telecoms single-mode fibre. Our results demonstrate a scalable approach to delivering pure single photons directly into guided-wave photonic devices.
The non-deterministic nature of photon sources is a key limitation for single-photon quantum processors. Spatial multiplexing overcomes this by enhancing the heralded single-photon yield without enhancing the output noise. Here the intrinsic statistical limit of an individual source is surpassed by spatially multiplexing two monolithic silicon-based correlated photon pair sources in the telecommunications band, demonstrating a 62.4% increase in the heralded single-photon output without an increase in unwanted multipair generation. We further demonstrate the scalability of this scheme by multiplexing photons generated in two waveguides pumped via an integrated coupler with a 63.1% increase in the heralded photon rate. This demonstration paves the way for a scalable architecture for multiplexing many photon sources in a compact integrated platform and achieving efficient two-photon interference, required at the core of optical quantum computing and quantum communication protocols. Photonic quantum technologies will require efficient single-photon sources and spatial multiplexing has been explored as a route to achieve this. Here, the authors present a scheme to integrate several single-photon sources using spatial multiplexing for on-chip applications at telecommunications wavelengths.
We demonstrate and characterize a heralded single photon source which is based on the signal and idler photon pairs generated from pulse pumped spontaneous four wave mixing in photonic crystal fibre. The heralded single photons are approximately in a pure temporal mode, achieved by eliminating the frequency correlation of the photon pairs. Since the influence of Raman scattering is negligible and no narrow bandpass filter is employed, the heralding efficiency of the source is up to 85%. When the production rate is 0.002 pair/pulse, the measured second-order intensity correlation function of the heralded single photons is , which is suppressed by a factor of more than 80 relative to the classical Poissonian light limit. In addition, the demonstrated source is pumped by a photonic crystal fibre laser, which makes the source more compact and low-cost.