Ultracompact, low-loss directional couplers on InP based on self-imaging by multimode interference

E.C.M. Pennings, R.J. Deri, A. Scherer, R. Bhat, T.R. Hayes, N.C. Andreadakis, M.K. Smit, L.B. Soldano, R.J. Hawkins

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Abstract

The authors report extremely compact (494- mu m-long 3 dB splitters, including input/output bends), polarization-insensitive, zero-gap directional couplers on InP with a highly multimode interference region, that are based on the self-imaging effect. They measured cross-state extinctions better than 28 dB and on-chip insertion losses of 0.5 dB/coupler plus 1 dB/cm guide propagation loss at 1523 nm wavelength
Original languageEnglish
Pages (from-to)1926-1928
JournalApplied Physics Letters
Volume59
Issue number16
Publication statusPublished - 1991

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