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arXiv · 0710.1143

High coherence photon pair source for quantum communication

Matthaeus Halder·Alexios Beveratos·Rob T Thew·Corentin Jorel·Hugo Zbinden·Nicolas Gisin
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Abstract

This paper reports a novel single mode source of narrow-band entangled photon pairs at telecom wavelengths under continuous wave excitation, based on parametric down conversion. For only 7 mW of pump power it has a created spectral radiance of 0.08 pairs per coherence length and a bandwidth of 10 pm (1.2 GHz). The effectively emitted spectral brightness reaches 3.9*10^5 pairs /(s pm). Furthermore, when combined with low jitter single photon detectors, such sources allow for the implementation of quantum communication protocols without any active synchronization or path length stabilization. A HOM-Dip with photons from two autonomous CW sources has been realized demonstrating the setup's stability and performance.

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Matthaeus Halder, Alexios Beveratos, Rob T Thew, Corentin Jorel, Hugo Zbinden, Nicolas Gisin. 2007-10-05. High coherence photon pair source for quantum communication. https://doi.org/10.1088/1367-2630/10/2/023027

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