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A 50-Gb/s optical transmitter, consisting of a DFB-LD with a bandwidth of 20 GHz and a SiGe BiCMOS LD driver, was developed. At 43-50 Gb/s, it enhanced a LD bandwidth and demonstrated wide eye openings.
Relationship between an S-parameter component corresponding to mode conversion and lumped parameters is investigated for high-speed differential copper cables using the theory of multi-conductor transmission lines. Experimentally observed frequency dependence of Scd21 is reproduced by analytical theories. Small fabrication tolerance is clarified.
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