China Telecom Corporation Ltd. Beijing Research Institute carried a terabit wavelength over a distance of 3,200 kilometers on G.652 optical fiber without Raman amplification that was error-free for 24 hours. The world record demonstration used ZTE’s ZXONE 8700 WDM platform and advanced Nyquist WDM Terabit PM-QPSK optical modulation and optical coherent detection technologies. The system leveraged ultra-high-speed signal processing and soft-decision forward error correction algorithms, achieving spectral efficiency of 4bit/Hz/s.
ZTE said this latest demonstration strengthens its global leadership in terabit optical transport systems. In 2012, ZTE and Deutsche Telekom successfully completed 100G/400G/1T long-haul transmission over 2,450 kilometers, setting a record in long-distance multi-rate mixed transmission. ZTE has successfully deployed more than 50 100G trial and commercial networks globally.
ZTE noted that it achieved record revenue in optical network products in the second-quarter of 2013, achieving the industry’s fastest growth rate in the preceding 12-month period, according to data from research company Ovum.