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A hybrid transmitter module comprising a 15-segment InP IQ segmented Mach–Zehnder modulator and two 0.13 μm BiCMOS SiGe:C drivers with integrated 4-bit DAC functionality is described. The high-resolution prototype allows a wide range of modulation formats and, for the first time, ultralow-power dual-polarization (DP) 64-QAM signal generation at record speed of 32 GBd without the usage of external...
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