Generation of polarisation-entangled photon pairs at 1550 nm using two PPLN waveguides

Yoshizawa, Akio; Kaji, R.; Tsuchida, Hidemi

doi:10.1049/el:20030400

Cited by 80 publications

(45 citation statements)

References 7 publications

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“…For example, a group in Tsukuba (Japan) demonstrated, in 2003, a telecom wavelength, broadband, and highly efficient, polarization entangled photon pair source based on two simultaneously pumped type-0 PPLN/Ws in a Mach-Zehnder interferometer configuration [121], and similar realizations have been reported subsequently [122,123]. As shown in FIG.…”

Section: B Hybrid Polarization Entanglement Sourcesmentioning

confidence: 79%

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Alibart¹,

D’Auria²,

Micheli³

et al. 2016

J. Opt.

168

116

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Integrated optical components on lithium niobate play a major role in standard high-speed communication systems. Over the last two decades, after the birth and positioning of quantum information science, lithium niobate waveguide architectures have emerged as one of the key platforms for enabling photonics quantum technologies. Due to mature technological processes for waveguide structure integration, as well as inherent and efficient properties for nonlinear optical effects, lithium niobate devices are nowadays at the heart of many photon-pair or triplet sources, single-photon detectors, coherent wavelength-conversion interfaces, and quantum memories. Consequently, they find applications in advanced and complex quantum communication systems, where compactness, stability, efficiency, and interconnectability with other guided-wave technologies are required. In this review paper, we first introduce the material aspects of lithium niobate, and subsequently discuss all of the above mentioned quantum components, ranging from standard photon-pair sources to more complex and advanced circuits.

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Section: B Hybrid Polarization Entanglement Sourcesmentioning

confidence: 79%

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Alibart¹,

D’Auria²,

Micheli³

et al. 2016

J. Opt.

168

116

View full text Add to dashboard Cite

show abstract

“…The conventional method to generate correlated photon-pairs is the use of parametric down conversion in bulk nonlinear crystals. Periodically poled lithium niobate (PPLN) waveguides have been used recently to generate correlated photon-pairs due to their high conversion efficiency compared to their bulk counterparts [1][2][3][4][5]. Furthermore, waveguide devices can be fiber pigtailed to achieve higher collection efficiency, as well as easy and stable operation.…”

Section: Introductionmentioning

confidence: 99%

“…[2,3] Here, signal and idler photons were generated at degenerate wavelengths and in the same spatial and polarization mode. Thus, to separate them may introduce an additional 3 dB loss.…”

Section: Introductionmentioning

confidence: 99%

Correlated photon-pair generation in reverse-proton-exchange PPLN waveguides with integrated mode demultiplexer at 10 GHz clock

Zhang¹,

Xie²,

Takesue³

et al. 2007

Opt. Express

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Abstract:We report 10-ps correlated photon pair generation in periodically-poled reverse-proton-exchange lithium niobate waveguides with integrated mode demultiplexer at a wavelength of 1.5-μm and a clock of 10 GHz. Using superconducting single photon detectors, we observed a coincidence to accidental count ratio (CAR) as high as 4000. The developed photon-pair source may find broad application in quantum information systems as well as quantum entanglement experiments.

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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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Generation of polarisation-entangled photon pairs at 1550 nm using two PPLN waveguides

Cited by 80 publications

References 7 publications

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Correlated photon-pair generation in reverse-proton-exchange PPLN waveguides with integrated mode demultiplexer at 10 GHz clock

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

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