Integrated Telecom Wavelength Heralded Single-Photon Source based on GHz gated detectors

• URL: http://arxiv.org/abs/2509.16049v1
• Date: Fri, 19 Sep 2025 14:59:36 GMT
• Title: Integrated Telecom Wavelength Heralded Single-Photon Source based on GHz gated detectors
• Authors: Maria Ana Pereira, Mingsong Wu, Arslan Sajid Raja, Rui Ning Wang, Tobias Kippenberg, Hugo Zbinden, Tiff Brydges, Rob Thew,
• Abstract summary: Scheme uses a rapid gating InGaAs/InP single photon avalanche diode.<n>We demonstrate the concept by combining this with a narrow-band integrated silicon nitride photon-pair source.
• Score: 0.9293803157621361
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We introduce a simple and flexible concept for a heralded -- spectrally pure -- single photon source. The scheme uses a probabilistic photon pair source pumped with a CW laser, whereby a rapid gating InGaAs/InP single photon avalanche diode provides a synchronous clock and temporally resolves, and hence spectrally filters, the heralded photons. We demonstrate the concept by combining this with a narrow-band integrated silicon nitride photon-pair source. This simple architecture is capable of heralding photons with high spectral purity in the telecom band, but could be adapted to other wavelengths and bandwidth regimes.

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