Fiber based source of photon pairs at telecom band with high temporal coherence and brightness for quantum information processing

Abstract

We experimentally demonstrate a bright pulsed source of correlated photon pairs at 1550 nm telecom band by pumping 300 m dispersion shifted fiber with a 4 ps pulse train. We investigate the coherence property of the source by measuring the second order intensity correlation function $g^{(2)}$ of individual signal (idler) photons. A preliminary Hong-Ou-Mandel type two-photon interference experiment with two such sources confirms the high temporal and spatial coherence of the source. The source is suitable for multi-photon quantum interference of independent sources, required in quantum information processing.

arXiv comment4 pages, 4 figures, submitted

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• Effect of chromatic dispersion induced chirp on the temporal coherence property of individual beam from spontaneous four wave mixing
• Testing spectral filters as Gaussian quantum optical channels
• Quantum efficiency measurement of single photon detectors using photon pairs generated in optical fibers