Integrated Multichannel Lithium Niobate Waveguides for Quantum Frequency Conversion

Zheng, Ming-Yang; Yao, Quan; Wang, Bin; Xie, Xiaozhu; Zhang, Qiang; Pan, Jian-Wei

doi:10.1103/physrevapplied.14.034035

Cited by 7 publications

(2 citation statements)

References 31 publications

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“…In Fig. 2a, the signal source is replaced by a single-photon source of one million photons centered at 1531 nm consisting of two variable optical attenuators (VOAs) and a 99/1 beam splitter 33 . The filtering system and SPAD are all the same as the noise measurement setup in Fig.…”

Section: Qfc Of Heralded Single-photon Sourcementioning

confidence: 99%

“…Quantum frequency conversion (QFC) has found extensive applications in quantum information research, including singlephoton detectors [22][23][24] , interfaces between long-distance quantum memories and various quantum systems [25][26][27][28][29] , and photon-color erasers 30,31 . In these previous demonstrations, efficient quantum frequency converters were implemented with periodically poled lithium niobate (PPLN) waveguides with optical mode dimensions of several microns using ridge waveguides 32 or diffused waveguides fabricated by proton exchange 26,33 or titanium indiffusion 34 . The noise distribution of QFC pumped with telecom-band laser has been studied on periodically poled LNOI nanophotonic chip 35 .…”

Section: Introductionmentioning

confidence: 99%

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Quantum frequency conversion and single-photon detection with lithium niobate nanophotonic chips

et al. 2023

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The lithium niobate on insulator (LNOI) platform has revolutionized lithium niobate materials, and a series of quantum photonic chips have exhibited unprecedented performances. Quantum frequency conversion (QFC) that enables quantum state preservation during frequency conversion is crucial in quantum technology. This work demonstrates a low-noise QFC process on the LNOI nanophotonic platform, connecting telecom and near-visible bands. An internal conversion efficiency of 73% and an on-chip noise count of 900 counts per second (cps) are achieved. Furthermore, the preservation of quantum statistical properties is verified, indicating the QFC chip’s promise for extensive applications of LNOI integrated circuits in quantum information. Based on this chip, we constructed an upconversion single-photon detector with a detection efficiency of 8.7% and a noise of 300 cps, paving the way to integrated on-chip single-photon detection. The realization of a low-noise QFC device also provide a pathway for practical chip-scale QFC-based quantum systems in heterogeneous configurations.

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Section: Qfc Of Heralded Single-photon Sourcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantum frequency conversion and single-photon detection with lithium niobate nanophotonic chips

et al. 2023

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A Sixteen‐user Time‐bin Entangled Quantum Communication Network With Fully Connected Topology

Huang,

Qi,

Yang

et al. 2024

Laser & Photonics Reviews

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Quantum key distribution (QKD) promises unconditionally information‐theoretic secure communication guaranteed by the laws of physics and has become one of the most crucial candidates in future security aspects. Developing a large‐scale network with a scalable and integrated scheme is of great significance for expanding the advantages of QKD protocols among multiple users. Here, a sixteen‐user fully connected quantum network by using a novel time‐bin entangled source implemented in the integrated multi‐channel periodically poled lithium niobate waveguides is proposed. Based on this entangled source, the quantum processor prepares 120 entangled photon pairs to allocate 15 links to each user by utilizing dense wavelength division multiplexing technology. To enable the users’ communication with each other simultaneously, a phase‐compensated Mach‐Zehnder Interferometer based on a Fourier‐transform setup to control the relative phase of the interferometer for all the involved wavelength channels is developed. The experimental results show that the network can support sixteen users for long‐distance communication with each other simultaneously. The novel scheme of time‐bin entangled sources paves an efficient way for implementing large‐scale quantum resources in a compact integrated platform, and the time‐bin entangled network promises a new potential for constructing large‐scale and extensible quantum networks with an integrated photonic architecture.

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Efficient Simultaneous Second Harmonic Generation and Dispersive Wave Generation in Lithium Niobate Thin Film

Peng,

Liu,

et al. 2024

Laser & Photonics Reviews

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Lithium niobate thin film (LNTF) is a promising platform for ultra‐low loss nonlinear integrated photonics. Here, the simultaneous generation of second harmonic wave (SHW) and dispersive wave (DW) are demonstrated in a single LNTF under the pump of a femtosecond pulse laser, with a conversion efficiency exceeding 25%. The second harmonic generation (SHG) uses the modal phase matching mechanism based on the second‐order nonlinear effect, while the DW generation is based on the perturbations of soliton dynamics caused by self‐phase modulation and higher‐order dispersion. Notably, significant and symmetrical SHW and DW patterns are observed, which exhibit strong spatial dispersion properties. A comprehensive analysis of the phase‐matching conditions are conducted for SHG and DW generation and provide a clear elucidation of the spectral properties of different regions of the emitted light patterns. Additionally, the evolution of the pump light in LNTF is thoroughly investigated, and the solutions of the generalized Schrödinger equation are in good agreement with these experimental results. This work sheds new light on the rich physics of nonlinear optical interactions on LNTF, and by utilizing the synergistic effect of second‐order and third‐order nonlinear effects, this study anticipates achieving efficient and high energy on‐chip broadband frequency conversion and supercontinuum generation across octaves.

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Integrated Multichannel Lithium Niobate Waveguides for Quantum Frequency Conversion

Cited by 7 publications

References 31 publications

Quantum frequency conversion and single-photon detection with lithium niobate nanophotonic chips

Quantum frequency conversion and single-photon detection with lithium niobate nanophotonic chips

A Sixteen‐user Time‐bin Entangled Quantum Communication Network With Fully Connected Topology

Efficient Simultaneous Second Harmonic Generation and Dispersive Wave Generation in Lithium Niobate Thin Film

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