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Creators/Authors contains: "Li, Xiaoying"

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  1. ; ; ; ; (, Photonics)
    Utilizing the phase-matching conditions of inter-modal four-wave mixing in an elliptical-core few-mode fiber supporting three non-degenerate modes, we experimentally demonstrate schemes for generating orbital-angular-momentum (OAM)-entangled photon pairs with high mode purity and for achieving highly mode-selective frequency conversion of beams in OAM-compatible (LP11a, LP11b) mode basis. These techniques expand the toolbox for using OAM modes in both classical and quantum communications and information processing. 
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    Free, publicly-accessible full text available March 1, 2026
  2. ; ; ; ; (, IEEE Photonics Technology Letters)
    null (Ed.)
    Full Text Available 
  3. ; ; ; ; (, IEEE Photonics Technology Letters)
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    Full Text Available 
  4. ; ; ; ; ; ; (, 2021 IEEE Photonics Conference (IPC))
    We discuss three emerging applications of wavelength conversion: 1) hybrid amplification outside of EDFA band, based on a combination of two wavelength converters and an EDFA, 2) spatial-mode-selective wavelength conversion, and 3) generation of spatial-mode-entangled photon pairs. 
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  5. ; ; ; ; (, CLEO conference 2021)
    null (Ed.)
    We describe OAM-compatible mode-selective frequency conversion in a few-mode fiber and experimentally demonstrate downconversion of various superpositions of signal modes LP11a and LP11b to the same LP11b mode with conversion efficiency differences <0.8 dB. 
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    Full Text Available 
  6. ; ; ; ; ; ; ; (, Photonics in Switching and Computing 2021)
    We discuss wavelength conversion of a selected signal spatial mode, which preserves its quantum state and does not disturb other signal spatial modes. We present the results for a lithium niobate waveguide and a few-mode-fiber. 
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    Accepted Manuscript Full Text Available
  7. ; (, APL Photonics)
    A new type of quantum interferometer was recently realized that employs parametric amplifiers (PAs) as the wave splitting and mixing elements. The quantum behavior stems from the PAs, which produce quantum entangled fields for probing the phase change signal in the interferometer. This type of quantum entangled interferometer exhibits some unique properties that are different from traditional beam splitter-based interferometers such as Mach–Zehnder interferometers. Because of these properties, it is superior to the traditional interferometers in many aspects, especially in the phase measurement sensitivity. We will review its unique properties and applications in quantum metrology and sensing, quantum information, and quantum state engineering. 
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  8. ; ; ; ; (, IEEE Photonics Conference 2020)
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    We present a scheme for spatial-mode-selective frequency conversion in a few-mode fiber and experimentally demonstrate upconversion of arbitrary superpositions of two signal modes from C-band to the fundamental mode in S-band with conversion efficiencies within 1 dB range of one another. 
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    Full Text Available 
  9. ; ; ; ; (, IEEE Photonics Conference 2020)
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    Aiming at producing spatial-mode-entangled photon pairs in a few-mode fiber, we experimentally demonstrate generation of idler beam from a seed signal in a superposition of two fiber modes. For every signal mode superposition, we observe the indication of idler mode orthogonality to the signal mode. 
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  10. ; ; ; ; (, Frontiers in Optics 2020)
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    We describe a novel scheme for generation of orbital-angular-momentum-entangled photons in a few-mode fiber. We experimentally verify the underlying inter-modal parametric processes with two-mode classical signal input, observing high mode purity of the generated idler. 
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    Full Text Available