High-efficiency flip-chip coupling between single-mode fibers and LiNbO3 channel waveguides
- 15 August 1980
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 37 (4) , 351-353
- https://doi.org/10.1063/1.91944
Abstract
Coupling efficiencies of ≳70% have been consistently measured between single‐mode fibers and LiNbO3 channel waveguides for TE and TM polarizations, using a Si V‐groove/flip‐chip arrangement. Tapered fibers in deep transverse grooves provide precise altitudinal alignment of the coupling fibers. These efficiencies are as high as those measured with a micropositioner and compare well with theoretical estimates of maximum coupling limited only by mode field distribution mismatch. Fiber/channel/fiber throughput losses of ∼3 dB and a polarization‐independent interferometric waveguide modulator with fiber input and output are reported.Keywords
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