Abstract:We demonstrate a silicon-organic hybrid (SOH) Mach-Zehnder modulator (MZM) generating four-level amplitude shift keying (4ASK) signals at symbol rates of up to 64 GBd both at room temperature and at an elevated temperature of 80 °C. The measured line rate of 128 Gbit/s corresponds to the highest value demonstrated for silicon-based MZM so far. We report bit error ratios of 10 −10 (64 GBd BPSK), 10 −5 (36 GBd 4ASK), and 4 × 10 −3 (64 GBd 4ASK) at room temperature. At 80 °C, the respective bit error ratios are 10 −10 , 10 −4 , and 1.3 × 10 −2 . The hightemperature experiments were performed in regular oxygen-rich ambient atmosphere. ©2016 Optical Society of America

We generate a 72-GBd single-carrier 64-QAM signal using high-speed digitalto-analog converters. We obtain a record line rate of 864 Gb/s on a single wavelength and demonstrate 5-channel WDM transmission over 400 km of fiber.

We report on a new 128 GSa/s SiGe digital to analog converter supporting data generation at 128 GBaud. We demonstrate successful transmission at 1.55 Tb/s net rate in back to back and 1.52 Tb/s after 80 km of SMF.

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