High effiency small-size planar hyperbolical lenses

P.C.A. Hammes, G.J.M. Krijnen, A. Driessen, M.K. Smit

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    Planar hyperbolical lenses with an average efficiency of 85% for coupling a 40 μm wide beam into a 4 μm wide waveguide are realised. The total length required for the beam compression is 600 μm, with a lateral index contrast of 0.01. Good agreement is found between the BPM predicted and the measured lens efficiencies.
    Original languageEnglish
    Pages (from-to)1064-1066
    Number of pages3
    JournalElectronics letters
    Issue number14
    Publication statusPublished - 5 Jul 1990

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