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arXiv · 2509.16049

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

Maria Ana Pereira·Mingsong Wu·Arslan Sajid Raja·Rui Ning Wang·Tobias Kippenberg·Hugo Zbinden·Tiff Brydges·Rob Thew
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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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Maria Ana Pereira, Mingsong Wu, Arslan Sajid Raja, Rui Ning Wang, Tobias Kippenberg, Hugo Zbinden, Tiff Brydges, Rob Thew. 2025-09-19. Integrated Telecom Wavelength Heralded Single-Photon Source based on GHz gated detectors. https://doi.org/10.1063/5.0305411

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