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Creators/Authors contains: "Shamsshooli, Afshin"

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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)
    null (Ed.)
    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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    Full Text Available 
  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. ; ; ; ; (, IEEE Photonics Conference 2020)
    null (Ed.)
    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 
  8. ; ; ; ; (, IEEE Photonics Conference 2020)
    null (Ed.)
    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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    Full Text Available 
  9. ; ; ; ; (, Frontiers in Optics 2020)
    null (Ed.)
    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 
  10. ; ; ; ; (, CLEO conference 2020)
    We describe a novel scheme for spatial-mode-entangled photon-pair generation in a few-mode fiber. We experimentally verify the underlying inter-modal parametric processes with two-mode classical signal input and demonstrate high mode purity of the generated idler. 
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    Full Text Available