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Quasi-Phase-Matched Waveguide Devices for Generation of Postselection-Free Polarization-Entangled Twin Photons

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4 Author(s)
Suhara, T. ; Dept. of Electr., Electron. & Inf. Eng., Osaka Univ., Suita, Japan ; Nakaya, G. ; Kawashima, J. ; Fujimura, M.

Quasi-phase-matched (QPM) Ti : LiNbO3 waveguide devices for generation of postselection-free polarization-entangled twin photons are proposed. The devices consist of cascaded two sections of slightly different QPM parameters. Generation of the entangled photons in the telecommunication band in a fabricated device of 2 times 15 mm interaction length is demonstrated through photon coincidence counting and quantum interference experiments.

Published in:

Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 15 )