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Opt Express. 2008 Aug 18;16(17):12505-10.

Observation of quantum interference between a single-photon state and a thermal state generated in optical fibers.

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College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information Science and Technology, Ministry of Education, Tianjin 300072, PR China.


We experimentally demonstrate a Hong-Ou-Mandel type of two-photon interference effect with a heralded single-photon state and a thermal state. The light sources in the 1550 nm telecom band are generated from two independent dispersion-shifted fibers via four-wave mixing process. The observed visibility is (82+/- 11)%. This type of interference between independent sources is crucial in quantum information process with independent qubits.

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