A waveguide frequency converter connecting rubidium-based quantum memories to the telecom C-band

Albrecht, Boris; Farrera, Pau; Fernandez-Gonzalvo, Xavier; Cristiani, M.; Riedmatten, Hugues de

doi:10.1038/ncomms4376

Cited by 103 publications

(123 citation statements)

References 53 publications

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“…Periodically poled lithium niobate (PPLN) technology has been widely used to efficiently generate photons, and it has been applied in the quantum domain to create heralded single-photon [1,2] and entangled photon pair sources [3][4][5][6][7], distribute/route entangled photons in optical networks [8][9][10], generate photon triplets [11], and perform coherent frequency conversion [12][13][14][15][16]. This work is focused on the development of a fiber-coupled heralded single-photon source (HSPS) that uses PPLN technology to create photon pairs at telecom wavelengths and can be operated with low power, economical continuous wave (CW) laser diodes.…”

Section: Introductionmentioning

confidence: 99%

Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components

Oesterling

Monteiro

Krupa

et al. 2015

Journal of Modern Optics

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To support quantum technologies that require entangled photon pairs and/or heralded photons for operation, a photon pair source was developed that uses periodically poled lithium niobate (PPLN) waveguides that are coupled to optical fibers. Both Ti-indiffused and annealed proton-exchanged (APE) waveguide technologies were studied, and waveguide/fiber interfaces were designed to increase the coupling efficiency of the photon pairs into optical fiber. PPLN waveguide devices were fabricated and the optical loss, wavelength conversion efficiency, and heralding efficiency were measured. The maximum heralding efficiencies achieved were 75 and 68% for Ti-indiffused and APE waveguides, respectively. A compact photon pair source based on a packaged PPLN waveguide device and commercially available fiber optic components is presented

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Section: Introductionmentioning

confidence: 99%

Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components

Oesterling

Monteiro

Krupa

et al. 2015

Journal of Modern Optics

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“…Miniature photonic devices, such as beam splitters, directional couplers, and mirroring modulators, have received a broad range of applications, including but not limited to optical telecommunications, quantum computing, biophotonic sensing, and information processing1234567. These devices are constructed based on the optical waveguide technology.…”

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confidence: 99%

Monolithic crystalline cladding microstructures for efficient light guiding and beam manipulation in passive and active regimes

Jia

Cheng

Aldana

et al. 2014

Sci Rep

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Miniature laser sources with on-demand beam features are desirable devices for a broad range of photonic applications. Lasing based on direct-pump of miniaturized waveguiding active structures offers a low-cost but intriguing solution for compact light-emitting devices. In this work, we demonstrate a novel family of three dimensional (3D) photonic microstructures monolithically integrated in a Nd:YAG laser crystal wafer. They are produced by the femtosecond laser writing, capable of simultaneous light waveguiding and beam manipulation. In these guiding systems, tailoring of laser modes by both passive/active beam splitting and ring-shaped transformation are achieved by an appropriate design of refractive index patterns. Integration of graphene thin-layer as saturable absorber in the 3D laser structures allows for efficient passive Q-switching of tailored laser radiations which may enable miniature waveguiding lasers for broader applications. Our results pave a way to construct complex integrated passive and active laser circuits in dielectric crystals by using femtosecond laser written monolithic photonic chips.

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“…Telecom frequency conversion of photons connected to several examples of quantum matter has recently been demonstrated, including quantum dots [21][22][23][24], cold gas atomic ensembles [25][26][27] and solid-state ensembles [28]. Applying QFC to trapped ions is challenging.…”

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confidence: 99%

Polarisation-preserving photon frequency conversion from a trapped-ion-compatible wavelength to the telecom C-band

et al. 2017

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Given the great success in encoding, manipulating, storing and reading-out quantum information in their electronic states, trapped atomic ions represent a powerful platform with which to build, or integrate into, the nodes of quantum networks [5,6]. Indeed, an elementary quantum network consisting of ions in two traps a few meters apart, has been entangled via travelling ultraviolet photons [7]. A challenge is that most readily-accessible photonic transitions in trapped ions lie at wavelengths that suffer significant absorption loss in materials for manipulating and guiding light, thereby limiting the internode networking distance. Another challenge is that ionic transitions are fixed and narrowband, such that, except in rare cases [8], they cannot be interfaced with other examples of quantum matter to enable new ion-hybrid quantum systems [9]. Note that frequency-distinguishable quantum systems can be linked via their photons, though at the cost of reducing the efficiency of making that link [10].The aforementioned challenges could be overcome using quantum frequency conversion (QFC) [11,12]; a nonlinear optical process in which a photon of one frequency is converted to another, whilst preserving all the quantum and classical photon properties. QFC of single photons has recently been studied in a variety of contexts [13][14][15][16][17][18] and is typically achieved using three-wave mixing in a secondorder non-linear ( 2 ) crystal. It has been shown that QFC can preserve a broad range of photon properties, including first-and second-order coherence, and pre-existing photonphoton entanglement [12,19,20]. QFC could, therefore, act as a quantum photonic adapter for trapped ions, allowing their high-energy photonic transitions to be interfaced with the lower-energy photons better suited for long-distance travel through optical fibers, or with other forms of quantum matter.Interfacing trapped ions with the telecom wavelengths of 1310 nm (O band) or 1550 nm (C band) is particularly Abstract We demonstrate polarisation-preserving frequency conversion of single-photon-level light at 854 nm, resonant with a trapped-ion transition and qubit, to the 1550-nm telecom C band. A total photon in / fiber-coupled photon out efficiency of ∼30% is achieved, for a free-running photon noise rate of ∼60 Hz. This performance would enable telecom conversion of 854 nm polarisation qubits, produced in existing trapped-ion systems, with a signal-to-noise ratio greater than 1. In combination with near-future trappedion systems, our converter would enable the observation of entanglement between an ion and a photon that has travelled more than 100 km in optical fiber: three orders of magnitude further than the state-of-the-art.

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A waveguide frequency converter connecting rubidium-based quantum memories to the telecom C-band

Cited by 103 publications

References 53 publications

Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components

Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components

Monolithic crystalline cladding microstructures for efficient light guiding and beam manipulation in passive and active regimes

Polarisation-preserving photon frequency conversion from a trapped-ion-compatible wavelength to the telecom C-band

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