An all fiber source of frequency entangled photon pairs

Abstract

We present an all fiber source of frequency entangled photon pairs by using four wave mixing in a Sagnac fiber loop. Special care is taken to suppress the impurity of the frequency entanglement by cooling the fiber and by matching the polarization modes of the photon pairs counter-propagating in the fiber loop. Coincidence detection of signal and idler photons, which are created in pair and in different spatial modes of the fiber loop, shows the quantum interference in the form of spatial beating, while the single counts of the individual signal (idler) photons keep constant. When the production rate of photon pairs is about 0.013 pairs/pulse, the envelope of the quantum interference reveals a visibility of $(95\pm 2)$, which is close to the calculated theoretical limit 97.4%

11 pages, 6 figures, to appear in Phys. Rev. A

References in corpus (7)

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• Demonstration of Dispersion-Cancelled Quantum-Optical Coherence Tomography
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• Photon pair generation using four-wave mixing in a microstructured fibre: theory versus experiment
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• Generation of 1.5 μm discrete frequency entangled two-photon state in polarization maintaining fibers
• Highly efficient source for frequency-entangled photon pairs generated in a 3rd order periodically poled MgO-doped stoichiometric LiTaO3 crystal
• Controlled entanglement routing between two virtual pathways
• Discrete frequency-bin entanglement generation via cascaded second-order nonlinear processes in Sagnac interferometer
• Generation of Photon Pairs in Dispersion Shift Fibers through Spontaneous Four Wave Mixing: Influence of Self-phase Modulation
• Deterministic separation of arbitrary photon pair states in integrated quantum circuits
• Passive optical switching of photon pairs using a spontaneous parametric fiber loop
• Evaluation of two-photon polarization density matrix of polarization-entangled photon-pairs generated through biexciton resonant hyper-parametric scattering