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

Lim, Han Chuen; Yoshizawa, Akio; Tsuchida, Hidemi; Kikuchi, K.

doi:10.1364/oe.16.012460

Cited by 59 publications

(37 citation statements)

References 21 publications

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“…This is because it is difficult to eliminate the polarization-mode walk-off in a nonlinear waveguide completely [41], which degrades the polarization-encoded quantum states. To compensate for the walk-off, polarization entanglement sources using on-chip waveguides require extra off-chip components [42][43][44][45][46]. We demonstrated the first polarization-entangled photon-pair source fully integrated on a chip as shown in Figure 2 [47].…”

Section: Polarization Entangled Photonpair Source On a Silicon Chipmentioning

confidence: 99%

Generation and manipulation of entangled photons on silicon chips

Matsuda

Takesue²

2016

Nanophotonics

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Integrated quantum photonics is now seen as one of the promising approaches to realize scalable quantum information systems. With optical waveguides based on silicon photonics technologies, we can realize quantum optical circuits with a higher degree of integration than with silica waveguides. In addition, thanks to the large nonlinearity observed in silicon nanophotonic waveguides, we can implement active components such as entangled photon sources on a chip. In this paper, we report recent progress in integrated quantum photonic circuits based on silicon photonics. We review our work on correlated and entangled photon-pair sources on silicon chips, using nanoscale silicon waveguides and silicon photonic crystal waveguides. We also describe an on-chip quantum buffer realized using the slow-light effect in a silicon photonic crystal waveguide. As an approach to combine the merits of different waveguide platforms, a hybrid quantum circuit that integrates a silicon-based photon-pair source and a silica-based arrayed waveguide grating is also presented.

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Section: Polarization Entangled Photonpair Source On a Silicon Chipmentioning

confidence: 99%

Generation and manipulation of entangled photons on silicon chips

Matsuda

Takesue²

2016

Nanophotonics

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“…We choose symmetric spontaneous parametric down-conversion (SPDC) in a periodically-poled lithium niobate (PPLN) waveguide [25][26][27][28][29][30][31][32][33][34] as our source of O-band photon-pairs because of its high SPDC efficiency and low output coupling loss. The heralding efficiency of our HPS is measured to be 74.5%.…”

Section: Introductionmentioning

confidence: 99%

Efficient heralding of O-band passively spatial-multiplexed photons for noise-tolerant quantum key distribution

Liu¹,

Lim²

2014

Opt. Express

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When implementing O-band quantum key distribution on optical fiber transmission lines carrying C-band data traffic, noise photons that arise from spontaneous Raman scattering or insufficient filtering of the classical data channels could cause the quantum bit-error rate to exceed the security threshold. In this case, a photon heralding scheme may be used to reject the uncorrelated noise photons in order to restore the quantum bit-error rate to a low level. However, the secure key rate would suffer unless one uses a heralded photon source with sufficiently high heralding rate and heralding efficiency. In this work we demonstrate a heralded photon source that has a heralding efficiency that is as high as 74.5%. One disadvantage of a typical heralded photon source is that the long deadtime of the heralding detector results in a significant drop in the heralding rate. To counter this problem, we propose a passively spatial-multiplexed configuration at the heralding arm. Using two heralding detectors in this configuration, we obtain an increase in the heralding rate by 37% and a corresponding increase in the heralded photon detection rate by 16%. We transmitted the O-band photons over 10 km of noisy optical fiber to observe the relation between quantum bit-error rate and noise-degraded second-order correlation function of the transmitted photons. The effects of afterpulsing when we shorten the deadtime of the heralding detectors are also observed and discussed.

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“…Parametric fluorescence by spontaneous parametric down conversion (SPDC) [1][2][3][4][5][6][7][8][9][10][11] and spontaneous four-wave mixing (SFWM) [12][13][14][15] is useful and realistic for such a photon-pair source, and it has been used in a lot of experimental studies concerning the QICTs.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies in generation of high-purity photon-pairs using cascaded χ^(2) processes in a periodically poled LiNbO_3 ridge-waveguide device

et al. 2012

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We report detailed experimental studies in a single wavelength-band system of correlated photon-pair generation in a 1.5 μm telecommunication wavelength-band using cascaded χ 2 : χ 2 processes, second-harmonic generation, and the following spontaneous parametric down conversion (c-SHG/SPDC), in a periodically poled LiNbO 3 (PPLN) ridge-waveguide device. By using a PPLN module with 600%∕W of the SHG efficiency, we achieved a coincidenceto-accidental ratio (CAR) of 2380 at 1.8 × 10 −4 of the mean number of the signal photon per pulse. Detailed investigation on the origin of uncorrelated noise photons was also discussed in this paper. We revealed that the noise photons mainly originated from spontaneous Raman scattering induced in pigtail optical fibers and also that the PPLN device itself had poor contribution to the noise photons. This feature of the c-SHG/SPDC process is promising for the realization of a noise-photon-free, high-purity quantum entangled photon-pair source.

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

Cited by 59 publications

References 21 publications

Generation and manipulation of entangled photons on silicon chips

Generation and manipulation of entangled photons on silicon chips

Efficient heralding of O-band passively spatial-multiplexed photons for noise-tolerant quantum key distribution

Experimental studies in generation of high-purity photon-pairs using cascaded χ^(2) processes in a periodically poled LiNbO_3 ridge-waveguide device

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