Opto-Electronics and Communications Conference (OECC)

Quasi-phase matched waveguide devices for generation of postselection-free polarization-entangled twin photons

Toshiaki Suhara, G. Nakaya, J. Kawashima, M. Fujimura

Published Jul 1, 2009• 2 citations

Abstract

Ti:LiNbO3waveguide devices consisting of cascaded two sections for generation of postselection-free polarization-entangled twin photons are proposed. Generation of the entangled photons in the telecom band is demonstrated by quantum interference experiments.

DOI: 10.1109/oecc.2009.5218570

Related papers

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

Toshiaki Suhara, G. Nakaya, J. Kawashima +1 more

Quasi-phase-matched (QPM) Ti : LiNbO3waveguide 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.

IEEE Photonics Technology LettersJun 2, 200939 citations

Generation of Polarization-Entangled Photons by Type-II Quasi-Phase-Matched Waveguide Nonlinear-Optic Device

Toshiaki Suhara, Hiroshi Okabe, M. Fujimura

A cross-polarized twin-photon generation device was implemented with Ti-indiffused LiNbO3waveguides and gratings for type-II (TE rarr TE + TM) quasi-phase matching. Generation of polarization-entangled twin-photon beams by a simple system using the fabricated device is demonstrated through quantum interference and photon polarization measurement experiment.

IEEE Photonics Technology LettersJun 28, 200738 citations

Type-I Quasi-Phase-Matched Waveguide Device for Polarization-Entangled Twin Photon Generation

J. Kawashima, M. Fujimura, Toshiaki Suhara

Quantum-entangled twin photons are expected to play an important role in future quantum communications and information processing. We propose and demonstrate a Type-I quasi-phase-matched (QPM) nonlinear-optic (NLO) LiNbO3waveguide device for high-efficiency polarization-entangled twin photon generation. The device consists of a Ti:LiNbO3channel waveguide, a ferroelectric domain-inverted grating for Type-I QPM, and a thin-film half-wave plate for polarization conversion at the center of the NLO interaction region. Generation of polarization-entangled twin-photons is demonstrated through quantum interference experiment.

IEEE Photonics Technology LettersFeb 26, 200913 citations

Cross-polarized twin photon generation device using quasi-phase matched LiNbO/sub 3/ waveguide

T. Nosaka, Bijoy Krishna Das, M. Fujimura +1 more

We demonstrate a cross-polarized twin photon generation device using a LiNbO3waveguide for the first time. The twin photons can easily be split into each photon, and the device has applications to polarization-entangled photon generation. Type II quasi-phase matching (TE/spl rarr/TE+TM) and nonlinear tensor element d/sub 24/ were used for twin photon generation in the 1.55-μm band by the parametric fluorescence.

IEEE Photonics Technology LettersDec 10, 200526 citations

Fabrication and Characterization of Cross-Polarized Twin Photon Generation Device Using Quasi-Phase Matched LiNbO3Waveguide

T. Nosaka, Bijoy Krishna Das, M. Fujimura +1 more

We demonstrate a cross-polarized twin photon generation device using a LiNbO3waveguide for the first time. Type II quasi-phase matching (TE→TE+TM) and nonlinear tensor element d24were used for twin photon generation in the 1.55μm band.

Jan 18, 20060 citations

LiNbO3Waveguide Quasi-Phase-Matched Highly Nondegenerate Twin Photon Generation Device for Heralded Single Photon Source

Shozo Kajita, M. Fujimura, Toshiaki Suhara

We designed, fabricated, and characterized a LiNbO3waveguide quasi-phase-matched highly nondegenerate twin photon generation device for a heralded single photon source. The power of the generated photon was nearly proportional to the pump power, as theoretically predicted. The temporal correlation of the generated twin photon was demonstrated by a photon coincidence counting experiment.

Japanese Journal of Applied PhysicsMar 1, 20101 citation