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  1. Article ; Online: Manipulation of continuous variable orbital angular momentum squeezing and entanglement by pump shaping.

    Li, Zhi / Guo, Xulian / Sun, Hengxin / Liu, Kui / Gao, Jiangrui

    Optics express

    2023  Volume 31, Issue 3, Page(s) 3651–3659

    Abstract: Spatially structured quantum states, such as orbital angular momentum (OAM) squeezing and entanglement, is currently a popular topic in quantum optics. The method of generating and manipulating spatial quantum states on demand needs to be explored. In ... ...

    Abstract Spatially structured quantum states, such as orbital angular momentum (OAM) squeezing and entanglement, is currently a popular topic in quantum optics. The method of generating and manipulating spatial quantum states on demand needs to be explored. In this paper, we generated OAM mode squeezed states of -5.4 dB for the
    Language English
    Publishing date 2023-01-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.479583
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Continuous variable spin-orbit total angular momentum entanglement on the higher-order Poincaré sphere.

    Guo, Hui / Liu, Na / Sun, Hengxin / Liu, Kui / Gao, Jiangrui

    Optics letters

    2023  Volume 48, Issue 7, Page(s) 1774–1777

    Abstract: Optical spin-orbit coupling is an important phenomenon and has fruitful applications. Here, we investigate the spin-orbit total angular momentum entanglement in the optical parametric downconversion process. Four pairs of entangled vector vortex modes ... ...

    Abstract Optical spin-orbit coupling is an important phenomenon and has fruitful applications. Here, we investigate the spin-orbit total angular momentum entanglement in the optical parametric downconversion process. Four pairs of entangled vector vortex modes are experimentally generated directly using a dispersion- and astigmatism-compensated single optical parametric oscillator, and for the first time, to the best of our knowledge, the spin-orbit quantum states are characterized on the quantum higher-order Poincaré sphere, and the relationship of spin-orbit total angular momentum Stokes entanglement is demonstrated. These states have potential applications in high-dimensional quantum communication and multiparameter measurement.
    Language English
    Publishing date 2023-05-23
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.487569
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Pure modulation and accurate measurement of optical beam's tilt and displacement.

    Sun, Hengxin / Li, Zhi / Guo, Hui / Liu, Kui / Gao, Jiangrui

    The Review of scientific instruments

    2021  Volume 92, Issue 6, Page(s) 64504

    Abstract: We developed a tilt modulation technique of a laser beam with a wedged crystal. Combined with a phase-compensating crystal, a pure tilt modulation with a wide bandwidth (actually determined by the bandwidth of electro-optic crystals) is realized. By ... ...

    Abstract We developed a tilt modulation technique of a laser beam with a wedged crystal. Combined with a phase-compensating crystal, a pure tilt modulation with a wide bandwidth (actually determined by the bandwidth of electro-optic crystals) is realized. By Fourier transformation with a lens, the tilt signal is transformed into displacement. With homodyne detection using a local oscillator of the first-order Hermite-Gauss mode (HG
    Language English
    Publishing date 2021-07-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/5.0050550
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 46/112: Show issues

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  4. Article ; Online: Long-term stable continuous variable entanglement generation in type-II non-degenerate optical parametric amplifier.

    Ma, Long / Guo, Hui / Liu, Kui / Sun, Hengxin / Gao, Jiangrui

    Optics express

    2019  Volume 27, Issue 24, Page(s) 35120–35128

    Abstract: Long-term stable entanglement is a crucial aspect in the implementation of reliable quantum information processes. However, long-term continuous variable entanglement generation, especially in type-II non-degenerate optical parametric amplifier, has yet ... ...

    Abstract Long-term stable entanglement is a crucial aspect in the implementation of reliable quantum information processes. However, long-term continuous variable entanglement generation, especially in type-II non-degenerate optical parametric amplifier, has yet to be reported on. Here, we derive the relationship between entanglement and temperature fluctuations in the crystal of a type-II non-degenerate optical parametric amplifier, and propose a novel method for long-term stable entanglement generation by locking the temperature of the crystal. In the experiment, we obtain a 5.4 dB entanglement lasting two hours. The method holds promise in the generation of a truly usable above 10 dB entanglement and brings us closer to continuous-variable quantum information processing.
    Language English
    Publishing date 2019-12-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.27.035120
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Experimental characterization of continuous-variable orbital angular momentum entanglement using Stokes-operator basis.

    Cai, Chunxiao / Ma, Long / Li, Juan / Guo, Hui / Liu, Kui / Sun, Hengxin / Gao, Jiangrui

    Optics express

    2018  Volume 26, Issue 5, Page(s) 5724–5732

    Abstract: The continuous-variable (CV) orbital angular momentum (OAM) entanglement is very different to the traditional quadrature entanglement. The Stokes-operators directly reflect the character of OAM light. Here, we report the first direct experimental ... ...

    Abstract The continuous-variable (CV) orbital angular momentum (OAM) entanglement is very different to the traditional quadrature entanglement. The Stokes-operators directly reflect the character of OAM light. Here, we report the first direct experimental demonstration the Stokes-operator entanglement of continuous-variable OAM entanglement. Generated by transforming quadrature entanglement in the HG
    Language English
    Publishing date 2018-03-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.26.005724
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Higher order mode entanglement in a type II optical parametric oscillator.

    Guo, Jun / Cai, Chunxiao / Ma, Long / Liu, Kui / Sun, Hengxin / Gao, Jiangrui

    Optics express

    2017  Volume 25, Issue 5, Page(s) 4985–4993

    Abstract: Nonclassical beams in high order spatial modes have attracted much interest but they exhibit much less squeezing and entanglement than the fundamental spatial modes, limiting their applications. We experimentally demonstrate the relation between pump ... ...

    Abstract Nonclassical beams in high order spatial modes have attracted much interest but they exhibit much less squeezing and entanglement than the fundamental spatial modes, limiting their applications. We experimentally demonstrate the relation between pump modes and entanglement of first-order Hermite Gauss modes (HG<sub>10</sub> entangled states) in a type II OPO and show that the maximum entanglement of high order spatial modes can be obtained by optimizing the pump spatial mode. To our knowledge, this is the first time to report this. Utilizing the optimal pump mode, the HG<sub>10</sub> mode threshold can be reached easily without HG<sub>00</sub> oscillation and HG<sub>10</sub> entanglement is enhanced by 53.5% over HG<sub>00</sub> pumping. The technique is broadly applicable to entanglement generation in high order modes.
    Language English
    Publishing date 2017-03-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.25.004985
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Measurement of Stokes-operator squeezing for continuous-variable orbital angular momentum.

    Guo, Jun / Cai, Chunxiao / Ma, Long / Liu, Kui / Sun, Hengxin / Gao, Jiangrui

    Scientific reports

    2017  Volume 7, Issue 1, Page(s) 4434

    Abstract: We demonstrate experimentally a measurement scheme for the Stokes operators for the continuous-variable squeezed states of orbital angular momentum (OAM). An OAM squeezed state is generated by coupling a dim Hermite-Gauss ... ...

    Abstract We demonstrate experimentally a measurement scheme for the Stokes operators for the continuous-variable squeezed states of orbital angular momentum (OAM). An OAM squeezed state is generated by coupling a dim Hermite-Gauss HG
    Language English
    Publishing date 2017-06-30
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-017-04713-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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