Polarization entangled photon-pair source based on quantum nonlinear photonics and interferometry

Kaiser, Florian; Ngah, Lutfi Arif; Issautier, Amandine; Delord, Tom; Aktas, Djeylan; D’Auria, Virginia; Micheli, Marc de; Kastberg, Anders; Labonté, Laurent; Alibart, Olivier; Martin, Anthony; Tanzilli, Sébastien

doi:10.1016/j.optcom.2014.03.056

Cited by 33 publications

(34 citation statements)

References 63 publications

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“…It should be mentioned that, in this configuration, only non-degenerate photon pairs can be exploited, as the pump laser light needs to be rejected to avoid detector saturation. Finally, a group in Kanagawa (Japan), and our team demonstrated that energy-time entanglement can be converted to polarization entanglement by a properly engineered polarization dependent delay line [131][132][133]. As shown in FIG.…”

Section: B Hybrid Polarization Entanglement Sourcesmentioning

confidence: 91%

“…Our group took also advantage of the high SPDC efficiency of type-0 PPLN/Ws to demonstrate a hybrid polarization entanglement source achieving bandwidths of 0.2 pm and 4 pm at 1560 nm. Near perfect visibilities of 99% and 97%, respectively, have been achieved in the standard Bell inequality test [132,133]. The 0.2 pm source was further used to perform a continuous wave teleportation experiment [84], and the 4 pm source was an essential building block for testing the foundations of quantum physics in a quantum delayed-choice experiment showing wave-particle complementarity [7].…”

Section: E Advanced Photonic Entanglement Sourcesmentioning

confidence: 99%

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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: 91%

Section: E Advanced Photonic Entanglement Sourcesmentioning

confidence: 99%

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

“…. A continuous‐wave (CW) laser at 769.88 nm (TOPTICA DL Pro) pumps a periodically poled lithium niobate waveguide (PPLN/WG) for generating broadband energy‐time entangled pairs of photons via SPDC . We exploit energy‐time entangled photons as information carriers, due to their inherent invulnerability against polarization mode dispersion and drifts , making this approach more robust for long distance distribution.…”

Section: Experimental Section and Methodsmentioning

confidence: 99%

Entanglement distribution over 150 km in wavelength division multiplexed channels for quantum cryptography

Aktas

Fedrici

Kaiser

et al. 2016

Laser & Photonics Reviews

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7 pages, 5 figuresInternational audienceGranting information privacy is of crucial importance in our society, notably in fiber communication networks. Quantum cryptography provides a unique means to establish, at remote locations, identical strings of genuine random bits, with a level of secrecy unattainable using classical resources. However, several constraints, such as non-optimized photon number statistics and resources, detectors' noise, and optical losses, currently limit the performances in terms of both achievable secret key rates and distances. Here, these issues are addressed using an approach that combines both fundamental and off-the-shelves technological resources. High-quality bipartite photonic entanglement is distributed over a 150 km fiber link, exploiting a wavelength demultiplexing strategy implemented at the end-user locations. It is shown how coincidence rates scale linearly with the number of employed telecommunication channels, with values outperforming previous realizations by almost one order of magnitude. Thanks to its potential of scalability and compliance with device-independent strategies, this system is ready for real quantum applications, notably entanglement-based quantum cryptography

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“…Polarization matching is simply obtained by inserting a fibre polarization controller on the LO path. A home-made fibre stretcher implements the LO phase scanning [27]. At the 50:50 f-BS outputs, light is directly sent to two InGaAs photodiodes (Thorlabs, FGA10, without cap) showing each η d ≈ 0.88 quantum efficiency at 1542 nm.…”

mentioning

confidence: 99%

A fully guided-wave squeezing experiment for fiber quantum networks

Kaiser¹,

Fedrici²,

Zavatta³

et al. 2016

Optica

Self Cite

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We demonstrate, for the first time, the realization of an entirely guided-wave squeezing experiment at a telecom wavelength. The state generation relies on waveguide non-linear optics technology while squeezing collection and transmission are implemented by using only telecom fibre components. We observe up to −1.83 ± 0.05 dB of squeezing emitted at 1542 nm in CW pumping regime. The compactness and stability of the experiment, compared to free-space configurations, represent a significant step towards achieving out-of-the-lab CV quantum communication, fully compatible with existing telecom fibre networks. We believe that this work stands as a promising approach for real applications as well as for "do-it-yourself" experiments. PACS numbers:Generation and manipulation of continuous variable (CV) non-classical states of light are the object of intense research due to their importance in both fundamental and applied physics [1,2]. Among others, a valuable feature of CV quantum resources is that they can be generated in a deterministic way at the output of non-linear optical media [3]. Moreover, CV entanglement is affected but never vanishes completely for any level of external loss [4]. On these bases, CV quantum optics has experienced an increasing interest for its application to quantum key distribution (QKD) [5], with many proposals based on both single-mode [6-8] and two-mode squeezed light [9,10]. Entanglement distillation and entanglement swapping schemes for long distance quantum communication have been demonstrated [5,11] and systematic studies have been performed on the robustness of non-classicality against the communication channel losses [12,13]. A further step towards real-world applications of CV quantum communication has been done by generating squeezed light in the telecom C-band of wavelengths, where low-loss optical fibres and high performance standard components are available [14][15][16]. In the perspective of implementing quantum networks that exploit optical fibres to connect distant atomic quantum memories, a quantum interface has recently been developed, converting squeezed light from telecom to visible wavelengths compatible with suitable atomic transitions [17]. In the same spirit, a light-matter interface, coupling light guided in a tapered nanofibre to cold atoms, has been demonstrated [18].In this framework, and in order to comply with further out-of-the-lab realizations of CV quantum optics, we demonstrate, for the first time, the feasibility of a full guided-wave approach for both the generation and measurement of squeezed light at a telecom wavelength. In our scheme, single-mode squeezing at 1542 nm is generated by spontaneous parametric down conversion (SPDC) in a periodically poled lithium niobate ridge-waveguide (PPLN/RW). At the output of the PPLN/RW, the non-classical beam is measured with a fibre homodyne detector. This configuration allows implementing an extremely easy setup, entirely based on commercially available components, and fully compatible with existing fibre network...

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Polarization entangled photon-pair source based on quantum nonlinear photonics and interferometry

Cited by 33 publications

References 63 publications

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Quantum photonics at telecom wavelengths based on lithium niobate waveguides

Entanglement distribution over 150 km in wavelength division multiplexed channels for quantum cryptography

A fully guided-wave squeezing experiment for fiber quantum networks

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