Long-wavelength-pumped upconversion single-photon detector at 1550 nm: performance and noise analysis

Pelc, Jason S.; Ma, Lei; Phillips, Colin R.; Zhang, Q.; Langrock, Carsten; Slattery, Oliver; Tang, Xiao; Fejer, M. M.

doi:10.1364/oe.19.021445

Cited by 203 publications

(208 citation statements)

References 31 publications

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“…Transmission losses at this wavelength are low in non-linear conversion crystals and the required poling period to overcome the phase mismatch can be precisely manufactured, allowing for efficient first-order quasi phase matching and long interaction lengths. Furthermore, single-step conversion to 1550 nm requires a pump laser in the so-called long-pump-wavelength regime: the 1902-nm pump photons have lower energy than the target 1550-nm wavelength, such that spontaneous parametric down conversion (SPDC) of the pump cannot produce noise photons at 1550 nm [13]. The threshold input photon wavelength for this condition is > 1550∕2 nm = 775 nm (1310∕2 nm = 655 nm), which can be found in very few ionic species and in each case is branching-ratio unfavored.…”

Section: The 854 Nm Transition In Ca +mentioning

confidence: 99%

“…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].…”

mentioning

confidence: 99%

“…Readily accessible photonic transitions in ions also lie in the ultraviolet or visible regime, which suffer high absorption and strong dispersion in nonlinear crystals. Furthermore, direct (single step) conversion of those photons to telecom in the so-called 'long pump wavelength regime' is not possible, leading to additional noise processes during conversion [13]. Nevertheless, significant progress has been made in overcoming these challenges [29][30][31].…”

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confidence: 99%

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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: The 854 Nm Transition In Ca +mentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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

et al. 2017

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“…att , one expects to tolerate a dark count on the order of 10 −4 per pulse, which is an order of magnitude higher than the typical background noise from frequency converters [55].…”

Section: Near-future Memories With Additional System Imperfectionsmentioning

confidence: 95%

“…In this work, we adopt the second scenario and assume that the wavelength and the bandwidth of the single-photon sources match that of quantum memories. In order to do side-BSMs, one may need to use a down-converter to match the wavelength of the two interfering photons [54][55][56]. We account for the conversion efficiency of such devices in our analysis.…”

Section: Device Modelingmentioning

confidence: 99%

Memory-assisted quantum key distribution resilient against multiple-excitation effects

Piparo

Sinclair

Razavi

2017

Quantum Sci. Technol.

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Memory-assisted measurement-device-independent quantum key distribution (MA-MDI-QKD) has recently been proposed as a technique to improve the rate-versus-distance behavior of QKD systems by using existing, or nearly-achievable, quantum technologies. The promise is that MA-MDI-QKD would require less demanding quantum memories than the ones needed for probabilistic quantum repeaters. Nevertheless, early investigations suggest that, in order to beat the conventional memoryless QKD schemes, the quantum memories used in the MA-MDI-QKD protocols must have high bandwidth-storage products and short interaction times. Among different types of quantum memories, ensemble-based memories offer some of the required specifications, but they typically suffer from multiple excitation effects. To avoid the latter issue, in this paper, we propose two new variants of MA-MDI-QKD both relying on single-photon sources for entangling purposes. One is based on known techniques for entanglement distribution in quantum repeaters. This scheme turns out to offer no advantage even if one uses ideal single-photon sources. By finding the root cause of the problem, we then propose another setup, which can outperform single memory-less setups even if we allow for some imperfections in our single-photon sources. For such a scheme, we compare the key rate for different types of ensemble-based memories and show that certain classes of atomic ensembles can improve the rate-versus-distance behavior.

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NIR to Visible Light Upconversion Devices Comprising an NIR Charge Generation Layer and a Perovskite Emitter

Lau

Xiao

et al. 2018

Advanced Optical Materials

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Near‐infrared (NIR) to visible light upconversion is of significant importance in many applications, including thermal imaging, bioimaging, night vision, and wellness monitoring. Here, the effort to develop a high‐performing NIR to saturated green light upconversion device comprising a front solution‐processable organic bulk heterojunction NIR charge generation layer (CGL) and an upper CsPbBr3 perovskite light‐emitting diode (LED) unit is reported. The NIR CGL, based on a blend of the NIR‐sensitive donor polymer and a nonfullerene acceptor, enables an efficient hole injection in the CsPbBr3 LED in the presence of the NIR light and also serves as an optical outcoupling layer to enhance the visible light emission by the CsPbBr3 LED. The CsPbBr3‐based perovskite LED has a narrow emission spectrum with a peak wavelength of 520 nm, corresponding to the wavelengths near the peak response of the human eye, and has the advantage in imaging applications. Based on the upconversion process, a pixel‐less NIR to visible light imaging device is demonstrated, which can be operated at a low voltage of 3 V. The results are very encouraging, revealing a high‐performing solution‐processable upconversion device for application in NIR light imaging.

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Long-wavelength-pumped upconversion single-photon detector at 1550 nm: performance and noise analysis

Cited by 203 publications

References 31 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

Memory-assisted quantum key distribution resilient against multiple-excitation effects

NIR to Visible Light Upconversion Devices Comprising an NIR Charge Generation Layer and a Perovskite Emitter

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