Quantum interference of multiple on-chip heralded sources of pure single photons

Spring, Justin B.; Salter, Patrick S.; Mennea, Paolo L.; Metcalf, Benjamin J.; Humphreys, Peter C.; Moore, M.W.; Gates, James C.; Thomas-Peter, Nicholas; Barbieri, Marco; Jin, Xian; Langford, Nathan K.; Kolthammer, W. Steven; Smith, Peter G. R.; Booth, M. J.; Smith, Brian J.

doi:10.1364/qim.2014.qw1b.6

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…have shown that the high extraction efficiency from laser written waveguides compensates for the lower production efficiency compared to other materials . These source have even been scaled to multiple indistinguishable devices across a single chip . Furthermore the nonlinearity of the amorphous χ (3) material can be enhanced using thermal poling methods to produce an effective second order nonlinearity from a third order nonlinearity .…”

Section: Progress Towards Integrationmentioning

confidence: 99%

Laser written circuits for quantum photonics

Meany

Gräfe

Heilmann

et al. 2015

Laser & Photonics Reviews

207

155

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The femtosecond laser direct-writing (FLDW) of waveguide circuits in glasses has seen interest from a number of fields over the previous 20 years. It has evolved from a curiosity to a viable platform for the rapid prototyping of small scale circuits. The field of quantum information science has exploited this capability and in the process advanced the fabrication technique. In this review the technological aspects of the laser inscription method relevant to quantum information science will be discussed. A range of demonstrations which have been enabled by laser written circuits will be outlined; these include novel circuits, simulations, photon sources and detection. This places the FLDW technique among the few integrated optical platforms to have produced individually every component required for scalable quantum computation.

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Section: Progress Towards Integrationmentioning

confidence: 99%

Laser written circuits for quantum photonics

Meany

Gräfe

Heilmann

et al. 2015

Laser & Photonics Reviews

207

155

View full text Add to dashboard Cite

show abstract

“…In addition, it is relatively difficult to realize an active device based on nonlinear-optical effect, such as a photon-pair source on a silica chip, because of the small nonlinearity of silica waveguides. Note that there have been several reports of photon-pair generation [29][30][31] using femtosecond laser direct written silica waveguides [32].…”

Section: Introductionmentioning

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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“…For completeness, a second waveguide (# 2) was also analysed. In this case the maximum count rate occurred at λ p = 958 nm implying excellent reproducibility of the fabrication process, which promises generation of highly indistinguishable heralded photons [26]. The dashed curve shows a calculation of the expected sinc 2 (∆kL eff /2) tuning curve based on the silica Sellmeier dispersion formula [25]; in this wavelength range, the waveguide contribution to the dispersion is negligible.…”

mentioning

confidence: 99%

Generation of heralded single photons beyond 1100 nm by spontaneous four-wave mixing in a side-stressed femtosecond laser-written waveguide

Yan¹,

Duan²,

Helt

et al. 2015

Applied Physics Letters

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We demonstrate a monolithically integrable heralded photon source in a femtosecond laser direct written glass waveguide. The generation of photon pairs with a wide wavelength separation requires a concomitant large birefringence in the normal dispersion regime. Here, by incorporation of sidestress tracks, we produce a waveguide with a birefringence of 1.64 × 10 −4 and propagation loss as low as 0.21 dB/cm near 980 nm. We measure photon pairs with 300 nm wavelength separation at an internal generation rate exceeding 5.05 × 10 6 /s. The second order correlations indicate that the generated photon pairs are in a strongly non-classical regime.

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Quantum interference of multiple on-chip heralded sources of pure single photons

Cited by 4 publications

References 10 publications

Laser written circuits for quantum photonics

Laser written circuits for quantum photonics

Generation and manipulation of entangled photons on silicon chips

Generation of heralded single photons beyond 1100 nm by spontaneous four-wave mixing in a side-stressed femtosecond laser-written waveguide

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