Fiber-assisted single-photon spectrograph

Avenhaus, Malte; Eckstein, Andreas; Mosley, Peter J.; Silberhorn, Christine

doi:10.1364/ol.34.002873

Cited by 173 publications

(149 citation statements)

References 19 publications

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“…If the two entangled squeezed modes are generated in a factorizable state, we should see that the joint spectral probability distribution is also factorizable [8,9]. In the lowsqueezing limit, where a single photon pair is generated, it was recently shown that it is possible to generate pairs with an effective mode number that is close to the ideal value of 1 [8][9][10][11][12][13][14][15]. Hong-Ou-Mandel interference provides a measure of the similarity of the spectral distributions of the signal and idler modes.…”

Section: Introductionmentioning

confidence: 98%

Generation of degenerate, factorizable, pulsed squeezed light at telecom wavelengths

Gerrits¹,

Stevens²,

Baek³

et al. 2011

Opt. Express

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Abstract:We characterize a periodically poled KTP crystal that produces an entangled, two-mode, squeezed state with orthogonal polarizations, nearly identical, factorizable frequency modes, and few photons in unwanted frequency modes. We focus the pump beam to create a nearly circular joint spectral probability distribution between the two modes. After disentangling the two modes, we observe Hong-Ou-Mandel interference with a raw (background corrected) visibility of 86% (95%) when an 8.6 nm bandwidth spectral filter is applied. We measure second order photon correlations of the entangled and disentangled squeezed states with both superconducting nanowire single-photon detectors and photon-numberresolving transition-edge sensors. Both methods agree and verify that the detected modes contain the desired photon number distributions.

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Section: Introductionmentioning

confidence: 98%

Generation of degenerate, factorizable, pulsed squeezed light at telecom wavelengths

Gerrits¹,

Stevens²,

Baek³

et al. 2011

Opt. Express

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show abstract

“…The bandwidth is adjusted to ensure a decorrelated PDC state. We characterize the spectral properties of the PDC photons by measuring their joint spectral intensity with a time-of-flight spectrometer 31 , consisting of a pair of dispersive fibres and a lowjitter superconducting nanowire single-photon detector (SNSPD; Photon Spot). From this measurement, shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Highly efficient frequency conversion with bandwidth compression of quantum light

Allgaier

Ansari

Sansoni

et al. 2017

Quantum Information and Measurement (QIM) 2017

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Hybrid quantum networks rely on efficient interfacing of dissimilar quantum nodes, as elements based on parametric downconversion sources, quantum dots, colour centres or atoms are fundamentally different in their frequencies and bandwidths. Although pulse manipulation has been demonstrated in very different systems, to date no interface exists that provides both an efficient bandwidth compression and a substantial frequency translation at the same time. Here we demonstrate an engineered sum-frequency-conversion process in lithium niobate that achieves both goals. We convert pure photons at telecom wavelengths to the visible range while compressing the bandwidth by a factor of 7.47 under preservation of non-classical photon-number statistics. We achieve internal conversion efficiencies of 61.5%, significantly outperforming spectral filtering for bandwidth compression. Our system thus makes the connection between previously incompatible quantum systems as a step towards usable quantum networks.

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“…in conjunction with a superconducting nanowire single photon detector (Opus One, Quantum Opus) and a time-tagging module (TTM8000, Austrian Institute of Technology) in order to build a calibrated spectrometer [39]. This system stretches the unfiltered signal 2/idler 2 pulses in time, according to their spectral components [40][41][42].…”

Section: Resultsmentioning

confidence: 99%

On-chip generation of photon-triplet states

et al. 2016

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Efficient sources of many-partite non-classical states are key for the advancement of quantum technologies and for the fundamental testing of quantum mechanics. We demonstrate the generation of time-correlated photon triplets at telecom wavelengths via pulsed cascaded parametric down-conversion in a monolithically integrated source. By detecting the generated states with success probabilities of (6.25 ± 1.09) × 10 −11 per pump pulse at injected powers as low as 10 µW, we benchmark the efficiency of the complete system and deduce its high potential for scalability. Our source is unprecedentedly long-term stable, it overcomes interface losses intrinsically due to its monolithic architecture, and the photon-triplet states dominate uncorrelated noise significantly. These results mark crucial progress towards the proliferation of robust, scalable, synchronized and miniaturized quantum technology.

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Fiber-assisted single-photon spectrograph

Cited by 173 publications

References 19 publications

Generation of degenerate, factorizable, pulsed squeezed light at telecom wavelengths

Generation of degenerate, factorizable, pulsed squeezed light at telecom wavelengths

Highly efficient frequency conversion with bandwidth compression of quantum light

On-chip generation of photon-triplet states

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