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  • Title: ZnO indiffused MgO:PPLN ridge waveguides.
    Author: Carpenter LG, Berry SA, Bannerman RHS, Gray AC, Gawith CBE.
    Journal: Opt Express; 2019 Aug 19; 27(17):24538-24544. PubMed ID: 31510341.
    Abstract:
    We have demonstrated the first MgO:PPLN ridge waveguides based on ZnO indiffusion and dicing. The fabrication process utilizes ductile regime dicing of a planar waveguide layer producing second harmonic generation (SHG) devices with a near-symmetric sinc2 spectral profile, indicating highly uniform 40 mm long devices. A near circular pump mode is also obtained enabling efficient coupling to single mode telecommunication fibers. A conversion efficiency of 145%/W, for 1560-780 nm SHG, has been measured.
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