Planar monomode optical couplers based on multimode interference effects

L.B. Soldano, F.B. Veerman, M.K. Smit, B.H. Verbeek, A.H. Dubost, E.C.M. Pennings

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Abstract

The self-imaging property of a homogeneous multimoded planar optical waveguide has been applied in the design of passive planar monomode optical couplers based on multimode interference (MMI). Based on these designs, 3 dB and cross couplers were fabricated in SiO/sub 2//Al/sub 2/O/sub 3//SiO/sub 2/ channel waveguides on Si substrates. Theoretical predictions and experimental results at 1.52- mu m wavelength are presented which demonstrate that MMI couplers offer high performance: on-chip excess loss better than 0.5 dB, high reproducibility, low polarization dependence and small device size
Original languageEnglish
Pages (from-to)1843-1850
JournalJournal of Lightwave Technology
Volume10
Issue number12
Publication statusPublished - 1992

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