We report a scheme for generating pulsed polarization-entangled photon pairs based on conversion from time-bin entanglement to polarization entanglement by use of an orthogonal polarization delay circuit and postselection. We have experimentally demonstrated the scheme, using a periodically poled lithium niobate waveguide, and successfully obtained polarization entanglement in the 1.55-µm telecom wavelength band.
© 2005 Optical Society of America
(130.3120) Integrated optics : Integrated optics devices
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(270.0270) Quantum optics : Quantum optics
Hiroki Takesue, Kyo Inoue, Osamu Tadanaga, Yoshiki Nishida, and Masaki Asobe, "Generation of pulsed polarization-entangled photon pairs in a 1.55-µm band with a periodically poled lithium niobate waveguide and an orthogonal polarization delay circuit," Opt. Lett. 30, 293-295 (2005)