Conductivity-dependency-free in-plane poling for Mach-Zehnder modulator with highly conductive electro-optic polymer

摘要

This letter presents the in-plane poling in electro-optic (EO) polymer modulators with conductivity dependency of core and claddings eliminated. A Mach-Zehnder (MZ) modulator with a highly conductive EO polymer, AJLS102/APC, is realized and poled by the in-plane coplanar waveguide poling electrode. Vπ of 7.7 V in a single-arm poled MZ (3.8 V for push-pull operation) is achieved and the evaluated r_(33) is 65 pm/V. Combined with the r_(33)'s of the previously measured single layers and MZ modulators using two other EO polymers, this experiment proves that the r_(33) proportional to the single layer r_(33) can be achieved in an in-plane MZ device regardless of the material conductivities.