Broadband source of telecom-band polarization-entangled photon-pairs for wavelength-multiplexed entanglement distribution

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

doi:10.1364/oe.16.016052

Cited by 53 publications

(47 citation statements)

References 19 publications

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“…They used a telecom wavelength broadband hybrid polarization entangled photon pair source based on a type-0 PPLN/W in a Sagnac loop configuration. Strong correlations across the full emission spectrum of the source were found, which demonstrate the potential for an N times speed-up of coincidence rates [125][126][127][128]. In 2013, a similar experiment was reported by a collaboration between Stockholm (Sweden), Vienna (Austria), and Waterloo (Canada), using a hybrid polarization entanglement source, this time based on two type-0 PPLN/W in a Mach-Zehnder configuration.…”

Section: E Advanced Photonic Entanglement Sourcessupporting

confidence: 55%

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Alibart¹,

D’Auria²,

Micheli³

et al. 2016

J. Opt.

161

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: E Advanced Photonic Entanglement Sourcessupporting

confidence: 55%

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Alibart¹,

D’Auria²,

Micheli³

et al. 2016

J. Opt.

161

116

View full text Add to dashboard Cite

show abstract

“…58 However, this source is less efficient since the photons pair emitted conically and only a small fraction of the cone can be collected for use. Regarding of this, beam-like entangled photons are more attractive, which can be achieved by coherently combining two SPDC sources at a polarizing beam splitter, [59][60][61][62][63][64][65] by manipulating polarization ququarts, 66 by overlapping two cascaded PP crystals. 67,68 However, a compact, postselection-free and bright polarization-entangled photons source is more valuable for practical applications.…”

Section: Integrated Engineering Of Polarization- Path-and Hyper-ementioning

confidence: 99%

Review Article: Quasi-phase-matching engineering of entangled photons

Zhu

2012

AIP Advances

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Quasi-phase-matching (QPM) technique has been successfully applied in nonlinear optics, such as optical frequency conversion. Recently, remarkable advances have been made in the QPM generation and manipulation of photon entanglement. In this paper, we review the current progresses in the QPM engineering of entangled photons, which are finished mainly by our group. By the design of concurrent QPM processes insides a single nonlinear optical crystal, the spectrum of entangled photons can be extended or shaped on demand, also the spatial entanglement can be transformed by transverse inhomogeneity of domain modulation, resulting in new applications in path-entanglement, quantum Talbot effects, quantum imaging etc. Combined with waveguide structures and the electro-optic effect, the entangled photons can be generated, then guided and phase-controlled within a single QPM crystal chip. QPM devices can act as a key ingredient in integrated quantum information processing

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“…At d Au = 15 nm, the bandwidth where the absorptance is > 90% is limited to 30 nm, and the maximum absorptance is reduced to 93%. These feature of the narrow bandwidth and the low absorptance may be not suitable to measure a broad band photon source such as an entangled broadband photon source [9]. Figure 2(b) is the dependence of absorption on the number of AR layers n AR with the fixed gold thickness of d Au = 10 nm.…”

Section: Design Of Ti-tes Optical Cavity Covered With Thin Gold Filmmentioning

confidence: 99%

Thin Gold Covered Titanium Transition Edge Sensor for Optical Measurement

et al. 2012

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A thin-gold-film-covered titanium transition edge sensor is newly developed for highly reliable optical photon detection. The aim of the gold film is to prevent a formation of a surface oxidation layer (typically 2.8 nm) on titanium that causes severe degradation of the titanium superconductivity. Optical properties for the gold-covered titanium TES embedded in an optical cavity are calculated, and we find that the maximum absorptance and absorption bandwidth will be reduced with increasing a thickness of the gold film. However, more than 99% absorptance can be possible for the gold (10 nm in thickness) and titanium (30 nm) if 11 dielectric layers are used in an anti-reflection coating. A depth profile of a chemical state for the fabricated device was analysed by an X-ray photoelectron spectroscopy. The profile shows no evidence of TiO 2 existence in photoelectron spectrum. Superconducting critical temperature covered with the 10 nm gold were in the range of 200 mK to 320 mK depending on the titanium thickness of 18 nm to 26 nm.

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Broadband source of telecom-band polarization-entangled photon-pairs for wavelength-multiplexed entanglement distribution

Cited by 53 publications

References 19 publications

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Review Article: Quasi-phase-matching engineering of entangled photons

Thin Gold Covered Titanium Transition Edge Sensor for Optical Measurement

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