This paper presents closed-form expressions for the amplitudes of document and intermodulation products resulting from driving a Mach-Zehnder optomodulator by a multisi-nusoidal RF voltage. These expressions are functions of the DC bias, Φ_(bias), and the voltage, V_π, required to change the output light intensity from its maximum value to its minimum value. Since Φ_(bias) and V_π are strongly dependent on the radiation intensity and the temperature, these expressions can be used to study the variation of the harmonic and intermodulation performance of Mach-Zehnder optomodulator with irradiation intensity and/or temperature. Using the results obtained in this paper, a data base can be established for the variation of the harmonic and intermodulation performance of the Mach-Zehnder optomodulators with the irradiation intensity and/or temperature. This would be interesting for any space applications using Mach-Zehnder optomodulators.
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