IEICE Communications Express
Online ISSN : 2187-0136
ISSN-L : 2187-0136
Sextuple-frequency two-tone signal generation using two cascaded Mach-Zehnder modulators for multiple harmonics cancelling
Takuya NishiakiKazunori OsatoMoriya Nakamura
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2020 Volume 9 Issue 8 Pages 377-382


We propose a novel sextuple-frequency two-tone signal generation method using two cascaded Mach-Zehnder modulators (MZMs). The first MZM is used to generate a large third-order harmonics component with a large RF input of 4.64Vπ (peak-to-peak). The second MZM is used to suppress first- and fifth-order unwanted harmonics at the same time. The proposed method was investigated by numerical simulations and experiments. We successfully suppressed the unwanted harmonics to less than -21 dB of the intended third-order harmonics by using two MZMs with extinction ratios of 23 dB and 26 dB.

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