Ultra-fast heralded single photon source based on telecom technology

Ngah, Lutfi Arif; Alibart, Olivier; Labonté, Laurent; D’Auria, Virginia; Tanzilli, Sébastien

doi:10.1002/lpor.201400404

Cited by 72 publications

(66 citation statements)

References 30 publications

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“…H (0) = 0.023 has been measured at (detected) N A = 2.1 MHz, 26 and g (2) H (0) = 0.005 has been measured at (detected) N A = 10 kHz. 10 The heralding (Klyshko) efficiency, defined as N AB /(N A × D) where D is the detection efficiency of the heralded photon, was calculated to be between 1.3% and 2% for raw (off-chip) values of the rates.…”

Section: Heralded Single-photon Generationmentioning

confidence: 91%

High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides

Zhao¹,

Ma²,

Rüsing³

et al. 2020

Phys. Rev. Lett.

249

120

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We report measurements of time-frequency entangled photon pairs and heralded single photons at telecommunications wavelengths, generated using a periodically-poled, lithium niobate on insulator (LNOI) waveguide pumped optically by a diode laser. We achieve a high Coincidences-to-Accidentals Ratio (CAR) at high pair brightness, a low value of the conditional self-correlation function [g (2) (0)], and high two-photon energy-time Franson interferometric visibility, which demonstrate the high quality of the entangled photon pairs and heralded single photons.

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Section: Heralded Single-photon Generationmentioning

confidence: 91%

High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides

Zhao¹,

Ma²,

Rüsing³

et al. 2020

Phys. Rev. Lett.

249

120

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“…On one hand, non-linear optics based on waveguide technology offers, compared to bulk implementations, better compactness and stability [19], as well as the possibility of efficient SPDC in a single pass arrangement [20][21][22]. On the other hand, the use of off-the-shelf telecom fibre components permits the realization of a simple and plug-and-play setup that requires no alignment effort for spatial mode matching and that can be straightforwardly modified by connecting additional fibre components [23]. Our approach, by first combining these two technologies and CV quantum optics, paves the way towards the realization of accessible and versatile experiments for CV quantum communication [24].…”

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confidence: 99%

A fully guided-wave squeezing experiment for fiber quantum networks

Kaiser¹,

Fedrici²,

Zavatta³

et al. 2016

Optica

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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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“…This allows the signal-to-noise of heralded single photons to be increased without affecting the brightness of the source. A number of groups have recently demonstrated high repetition rate photon pair sources [83][84][85] where this effect has been successfully measured through the degree of second order coherence [85] .…”

Section: Multiplexing: a Route To Deterministic Operationmentioning

confidence: 99%

Active Multiplexing of Spectrally Engineered Heralded Single Photons in an Integrated Fibre Architecture

Francis-Jones

2017

Springer Theses

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In recent years, there has been rapid development in processing of quantum information using quantum states of light. The focus is now turning towards developing real-world implementations of technologies such as all-optical quantum computing and cryptography. The ability to consistently create and control the required single photon states of light is crucial for successful operation. Therefore, high performance single photon sources are very much in demand.The most common approach of generating the required nonclassical states of light is through spontaneous photon pair generation in a nonlinear medium. One photon in the pair is detected to "herald" the presence of the remaining single photon. For many applications the photons are required to be in pure indistinguishable states. However, photon pairs generated in this manner typically suffer from spectral correlations, which can lead to the production of mixed, distinguishable states. Additionally, these sources are probabilistic in nature, which fundamentally limits the number of photons that can be delivered simultaneously by independent sources and hence the scalability of these future technologies.One route to deterministic operation is by actively multiplexing several independent sources together to increase the probability of delivering a single photon from the system. This thesis presents the development and analysis of a multiplexing scheme of heralded single photons in high-purity indistinguishable states within an integrated optical fibre system. The spectral correlations present between the two photons in the pair were minimised by spectrally engineering each photonic crystal fibre source. A novel, in-fibre, broadband filtering scheme was implemented using photonic bandgap fibres. In total, two sources were multiplexed using a fast optical switch, yielding an 86% increase in the heralded count rate from the system. AcknowledgementsI would first like to express my gratitude to my supervisor Dr. Peter Mosley, for giving me the opportunity to work with him on an exciting and interesting project, and for first introducing me to the world of quantum optics in the final year of my undergraduate degree. Without his support and guidance over the last three years, this thesis and the work that it contains would not have been possible. It has been a tremendously enjoyable learning experience (for both of us I hope!), and I think I can safely say that I now know more about FPGAs than I ever thought or hoped I would! I am incredibly grateful for the opportunity, and eagerly look forward to continue working with you on the upcoming NQIT project.Secondly, I would like to thank all of the staff and students, past and present, of the Centre for Photonics and Photonic Materials for providing an enjoyable, interesting and supportive learning environment. I would particularly like to thank James, for casting his eye over my fibre designs, passing down his fabrication knowledge, and teaching me the dark art of the dispersion rig! I would also especially like to ...

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Ultra-fast heralded single photon source based on telecom technology

Cited by 72 publications

References 30 publications

High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides

High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides

A fully guided-wave squeezing experiment for fiber quantum networks

Active Multiplexing of Spectrally Engineered Heralded Single Photons in an Integrated Fibre Architecture

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