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A complete high-frequency small-signal circuit model of a 40 Gb/s butterfly electro-absorption modulator integrated laser module is presented for the first time to analyze and optimize its Electro-Optic (E/O) response and reflection characteristics. An agreement between measured and simulated results demonstrates the accuracy and validity of the procedures. By optimizing the bonding wire length and the impedance of the coplanar waveguide transmission lines, the E/O response increases approximately 5% to 15% from 20 GHz to 33 GHz, while the signal injection efficiency increases from approximately 15% to 25% over 18 GHz to 35 GHz.
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