Stable source of high quality telecom-band polarization-entangled photon-pairs based on a single, pulse-pumped, short PPLN waveguide | Zendy

Han Chuen Lim | Zendy; Akio Yoshizawa | Zendy; Hidemi Tsuchida | Zendy; K. Kikuchi | Zendy

Open Access

Stable source of high quality telecom-band polarization-entangled photon-pairs based on a single, pulse-pumped, short PPLN waveguide

Author(s) -

Han Chuen Lim,

Akio Yoshizawa,

Hidemi Tsuchida,

K. Kikuchi

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.012460

Subject(s) - lithium niobate , optics , quantum entanglement , polarization (electrochemistry) , photon , quantum optics , spontaneous parametric down conversion , photon entanglement , physics , optoelectronics , materials science , quantum , chemistry , quantum mechanics

We demonstrate a stable source of high quality telecom-band polarization-entangled photon-pairs based on a single, pulse-pumped, short periodically-poled lithium niobate (PPLN) waveguide. Full quantum state tomographic measurement performed on the photon-pairs has revealed a very high state purity of 0.94, and an entanglement fidelity exceeding 0.96 at the low-rate-regime. At higher rates, entanglement quality degrades due to emission of multiple-pairs. Using a new model, we have confirmed that the observed degradation is largely due to double- and triple-pair emissions.

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