The two-photon polarized entangled state is generated from the typeⅡspontaneous parametric down-conversion pumped by a femtosecond pulse.The two-photon interference is observed in the Hong-Ou-Mandel interferometer.Th...The two-photon polarized entangled state is generated from the typeⅡspontaneous parametric down-conversion pumped by a femtosecond pulse.The two-photon interference is observed in the Hong-Ou-Mandel interferometer.The high visibility of the interference is restored with narrow band interference filters placed in front of the detectors.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19874056the National Natural Science Foundation for Youth of China under Grant No.69907005。
文摘The two-photon polarized entangled state is generated from the typeⅡspontaneous parametric down-conversion pumped by a femtosecond pulse.The two-photon interference is observed in the Hong-Ou-Mandel interferometer.The high visibility of the interference is restored with narrow band interference filters placed in front of the detectors.