  Integrated ferroelectric plasmonic modulators featuring large bandwidths,
broad optical operation range, resilience to high temperature and ultracompact
footprint are introduced. Measurements show a modulation bandwidth of 70 GHz
and a temperature stability up to 250{\deg}C. Mach-Zehnder interferometer
modulators with 10-$\mu$m-long phase shifters were operated at 116 Gbit/s PAM-4
and 72 Gbit/s NRZ. Wide and open eye diagrams with extinction ratios beyond 15
dB were found. The fast and robust devices are apt to an employment in
industrial environments.
