The demonstration used a terabit real-time transmission system based on ZTE’s ZXONE 8700 platform. The occurred over G.652 optical fiber without Raman amplification, ZTE says. The fact that the collaborators maintained this transmission error-free for 24 hours means they set a world record, ZTE says.
The optical transport system used Nyquist WDM terabit PM-QPSK optical modulation and optical technologies, as well as ultra-high-speed signal processing and soft-decision forward error correction algorithms to achieve spectral efficiency of 4 bit/Hz/s, ZTE says.
This is the second major 1-Tbps transmission demonstration ZTE has announced. The company partnered with Deutsche Telekom in early 2012 on a 100G/400G/1T long-haul transmission test over 2450 km. It demonstrated a prototype 400G/1T system later that year (see ).