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Quantum Networks

A Fibre-Integrated SPDC Heralded Single-Photon Source Using Zn-Indiffused PPLN Ridge Waveguides at Telecom Wavelengths

arXiv
Authors: Peter Iveson, Paolo L. Mennea, Goronwy Tawy, Rex H. S. Bannerman, Noe Palomar-Davidson, Lewis D. Wright, Patrick M. Ledingham, Peter G. R. Smith, James C. Gates, Corin B. E. Gawith

Year

2026

Paper ID

72754

Status

Preprint

Abstract Read

~2 min

Abstract Words

98

Citations

N/A

Abstract

We report a fibre-integrated heralded single-photon source based on a commercial Zn-indiffused MgO:PPLN ridge waveguide operated in Type-0 degenerate spontaneous parametric down-conversion (SPDC). The device emits a broadband spectrum spanning approximately 70 nm across the telecom C-and L-bands, with an absolute brightness of 9.1times 109 pairs/(s mW). After accounting for optical losses, we determine an internal heralding efficiency of 58(5)%. The source maintains high purity, exhibiting a coincidences-to-accidentals ratio exceeding 9times 104 and a heralded second-order correlation of gh(2)(0) = \(5.53 pm 0.46\)times 10-4. Low multi-photon noise and broadband emission demonstrate the viability of such platforms for wavelength-multiplexed quantum networking.

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  • We report a fibre-integrated heralded single-photon source based on a commercial Zn-indiffused MgO:PPLN ridge waveguide operated in Type-0 degenerate spontaneous parametric...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2607.13215 [2] arXiv https://arxiv.org/abs/2607.13215 [3] Publisher https://arxiv.org/abs/2607.13215

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