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Polarisation-entangled photon-pair source at 1550nm using 1 mm-long PPLN waveguide in fibre-loop configuration

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3 Author(s)
Odate, S. ; Nat. Inst. of Adv. Ind. Sci. & Technol. (AIST), Tsukuba ; Yoshizawa, A. ; Tsuchida, H.

A source of polarisation-entangled photons that uses the spontaneous parametric downconversion process in the telecommunication wavelength band is reported. A 1 mm-long periodically poled lithium niobate waveguide was placed in a fibre loop to realise spontaneous parametric downconversion, and it was operated at room temperature. Two-photon interferences having visibilities greater than 84% before subtraction of accidental coincidence counts were observed.

Published in:

Electronics Letters  (Volume:43 ,  Issue: 24 )