222-GBaud on-off keying transmitter using ultra-high-speed 2:1-selector and plasmonic modulator on silicon photonics

We demonstrate a 222-GBaud OOK optical transmitter for short-reach transmission, with direct detection after 120 m of standard single mode fiber. To reach this record symbol rate, we leverage a 2:1 digital multiplexing selector in InP DHBT and a plasmonic-organic hybrid (POH) modulator on silicon photonics.