• Proceedings of the Optical Society of Korea Conference
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• 2009.02a
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• pp.315-316
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• 2009

• Korean Journal of Optics and Photonics
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• v.18 no.1
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• pp.84-89
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• 2007

Bell states have been investigated in a Hong-Ou-Mandel interferometer using photon pairs from a type-1 SPDC. The four kinds of the Bell states, $|{\Psi}^+>,|{\Psi}^->,|{\Phi}^+>,|{\Phi}^->$ are created by placing 2 HWPs, 2 QWPs at outputs of the interferometer. They show an average visibility of 77% in the coincidence measurement.