Periodically poled lithium niobate waveguide sum-frequency generator for efficient single-photon detection at communication wavelengths

Roussev, Rostislav V.; Langrock, Carsten; Kurz, J.R.; Fejer, M. M.

doi:10.1364/ol.29.001518

Cited by 167 publications

(130 citation statements)

References 11 publications

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“…In our experiments, 1 and 2 are the frequencies of the 1550 and 854 nm photons, respectively. For QFC in a waveguideintegrated lossless material, and in the case of perfect phase matching, one can show that the efficiency of conversion for an interaction (waveguide) length L is given by [39] …”

Section: Efficiencymentioning

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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Section: Efficiencymentioning

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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“…QFC using TWM was first demonstrated in [12] and the theoretical framework was laid out earlier in [13,14]. The process of frequency conversion (FC) using TWM has been used for single-photon up-conversion detection, since photon detectors are more efficient at lower wavelengths [15][16][17], but also for quantum networks using photon down-conversion [18]. Because current quantum memories emit wavepackets that are temporally much wider than what is desired for optical communication systems, a way to modify the shape of the wavepacket is desired [8,9,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effects of nonlinear phase modulation on Bragg scattering in the low-conversion regime

Mejling¹,

Cargill²,

McKinstrie³

et al. 2012

Opt. Express

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Abstract:In this paper, we consider the effects of nonlinear phase modulation on frequency conversion by four-wave mixing (Bragg scattering) in the low-conversion regime. We derive the Green functions for this process using the time-domain collision method, for partial collisions, in which the four fields interact at the beginning or the end of the fiber, and complete collisions, in which the four fields interact at the midpoint of the fiber. If the Green function is separable, there is only one output Schmidt mode, which is free from temporal entanglement. We find that nonlinear phase modulation always chirps the input and output Schmidt modes and renders the Green function formally nonseparable. However, by pre-chirping the pumps, one can reduce the chirps of the Schmidt modes and enable approximate separability. Thus, even in the presence of nonlinear phase modulation, frequency conversion with arbitrary pulse reshaping is possible, as predicted previously [Opt. Express 20, 8367-8396 (2012)].

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“…Although these interactions have been shown to preserve coherence [15][16][17] , they are generally performed using strong fields [18][19][20] . It is only recently that parametric effects such as cross-phase modulation 21,22 and spontaneous downconversion 23,24 have been observed with a single-photon level pump.…”

mentioning

confidence: 99%

Interaction of independent single photons based on integrated nonlinear optics

et al. 2013

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The parametric interaction of light beams in nonlinear materials is usually thought to be too weak to be observed when the fields involved are at the single-photon level. However, such single-photon level nonlinearity is not only fundamentally fascinating but holds great potential for emerging technologies and applications involving heralding entanglement at a distance. Here we use a high-efficiency waveguide to demonstrate the sum-frequency generation between a single photon and a single-photon level coherent state. The use of an integrated, solid state, room temperature device and telecom wavelengths makes this type of system directly applicable to future quantum communication technologies such as device-independent quantum key distribution.

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Periodically poled lithium niobate waveguide sum-frequency generator for efficient single-photon detection at communication wavelengths

Cited by 167 publications

References 11 publications

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

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

Effects of nonlinear phase modulation on Bragg scattering in the low-conversion regime

Interaction of independent single photons based on integrated nonlinear optics

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