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Investigation on nonlinear characteristics of the Mach-Zehnder intensity modulator based on Bessel series expansion

We investigate the nonlinear characteristics of the Mach-Zehnder (MZ) intensity modulator using based on Bessel series expansion. The method we used provides the easy characterization of the harmonic components of an MZ intensity modulator. Theoretical analysis results are agreeable with those obtained in the experiment. Compared to the traditional methods, this method can analyse the operating characteristics of the MZ intensity modulator without executing a complicated experiment. It can not only be used to characterize harmonic component of MZ intensity modulator with high accuracy and fast calculation, but also can be extended to analyze the nonlinear distortion of the analogue signal modulation.