Fast and simple characterization of a photon pair source

Details Fast and simple characterization of a photon pair source Fast and simple characterization of a photon pair source

2008-08-20

arxiv.org/abs/0808.2674v2

Opt. Express 16, 17060-17069 (2008)

Physics

Quantum Physics

10 pages, 5 figures. Published version

Scientific paper

10.1364/OE.16.017060

We present an exact model of the detection statistics of a probabilistic source of photon pairs from which a fast, simple and precise method to measure the source's brightness and photon channel transmissions is demonstrated. We measure such properties for a source based on spontaneous parametric downconversion in a periodically poled LiNbO$_3$ crystal producing pairs at 810 and 1550 nm wavelengths. We further validate the model by comparing the predicted and measured values for the $g^{(2)}(0)$ of a heralded single photon source over a wide range of the brightness. Our model is of particular use for monitoring and tuning the brightness on demand as required for various quantum communication applications. We comment on its applicability to sources involving spectral and/or spatial filtering.

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