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We present a digital predistortion (DPD) technique to compensate for in-phase and quadrature (IQ) Mach–Zehnder modulators (MZM) with finite extinction ratio (ER). The proposed method significantly improves the system performance by reducing the impairments introduced by the component imperfections. Our technique is performed in two steps: First, the $\arcsin$ predistorts the nonlinear sinusoidal transfer...
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