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Optical Fiber Communication Conference

Two-Qubit State Engineering in the Telecom O-Band

Matthew Hall, Joseph B. Altepeter, Prem Kumar

Published Jan 1, 2010• 0 citations
Publisher

Abstract

We build and characterize a fiber-based source of 1310-nm polarization entanglement with the highest reported fidelity to a maximally entangled state, 99.6% ± 0.15% as characterized via coincidence basis tomography.
DOI
10.1364/ofc.2010.owc1

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We have constructed and experimentally characterized what we believe to be the first fiber-based source of degenerate polarization-entangled photon pairs in the telecommunication band. Our source design utilizes bichromatic pump pulses and an optical-fiber Sagnac loop aligned to deterministically separate degenerate photon pairs at a central wavelength. The source exhibits 0.997+/-0.006 fidelity with a maximally entangled state, measured using quantum state tomography. When reconfigured to produce identical photon pairs, the source exhibits a Hong-Ou-Mandel interference visibility of 0.97+/-0.04.