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  • Title: Polarization-independent photon up-conversion with a single lithium niobate waveguide.
    Author: Wang S, Yao N, Fang W, Tong L.
    Journal: Opt Express; 2022 Jan 17; 30(2):2817-2824. PubMed ID: 35209414.
    Abstract:
    We propose a polarization-independent up-conversion protocol for single-photon detection at telecom band with a single thin-film periodically poled lithium niobate waveguide. By choosing the proper waveguide parameters, the waveguide dispersion can compensate the crystal birefringence so that quasi-phase-matching conditions for transverse electric and transverse magnetic modes can be simultaneously fulfilled with single poling period. With this scheme, randomly-polarized single photons at 1550 nm can be up-converted with a normalized conversion efficiency of 163.8%/W cm2.
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