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Journal Article

Experimental demonstration of a predictable single photon source with variable photon flux

MPS-Authors
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Chu,  Xiao-Liu
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Sandoghdar,  Vahid
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201072

Gotzinger,  Stephan
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Vaigu, A., Porrovecchio, G., Chu, X.-L., Lindner, S., Smid, M., Manninen, A., et al. (2017). Experimental demonstration of a predictable single photon source with variable photon flux. Metrologia, 54, 218-223. doi:10.1088/1681-7575/aa5ba2.


Cite as: https://hdl.handle.net/21.11116/0000-0000-7F69-D
Abstract
We present a predictable single-photon source (SPS) based on a silicon vacancy centre in nanodiamond which is optically excited by a pulsed laser. At an excitation rate of 70 MHz the source delivers a photon flux large enough to be measured by a low optical flux detector (LOFD). The directly measured photon flux constitutes an absolute reference. By changing the repetition rate of the pulsed laser, we are able to change the photon flux of our SPS in a controllable way which in turn can act as a reference. The advantage of our method is that it does not require precise knowledge of the source efficiency, but the source is calibrated by the LOFD and can be used for detector responsivity characterizations at the few-photon level.