Zhang, Z.Z.ZhangFelipe, D. deD. deFelipeBrinker, W.W.BrinkerKleinert, M.M.KleinertMaese-Novo, A.A.Maese-NovoMoehrle, M.M.MoehrleZawadzki, C.C.ZawadzkiKeil, N.N.Keil2022-03-042022-03-042015https://publica.fraunhofer.de/handle/publica/23953510.1109/JLT.2014.2377092A colorless ONU is demonstrated on the polymer-based hybrid integration platform. Polymer Bragg gratings provide power-efficient wavelength tuning over the C-band. Thin-film element is inserted in the waveguide circuits for C/L band splitting and bi-directional transmission. On-chip U-groove and 45 degrees mirror allow submount-free and passive attachment of optical fiber and photo detectors, respectively. Arrays of deep-etched air trenches are introduced for cross-talk suppression. With an optical wavelength rejection level larger than 34 dB, 10-Gb/s bidirectional transmission and detection are achieved.en535journal article