Characterization of dual-electrode Mach-Zehnder modulator based optical frequency comb generator in two regimes

Amplitude and phase characterization of the output from a dual-electrode LiNbO
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Mach-Zehnder modulator based ultra-flat optical frequency comb generator is investigated for well-known ldquoin-phaserdquo operation and a new ldquoout-of-phaserdquo regime. The out-of-phase regime may be realized with a single-electrode Mach-Zehnder modulator.