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ZTE Demonstrates Record-Breaking Single-Carrier 800G 16QAM Long-Haul Transmission Test Result

SHENZHEN, CHINA — (Marketwired) — 07/12/16 — ZTE Corporation (0763.HK / 000063.SZ), a major international provider of telecommunications, enterprise and consumer technology solutions for the Mobile Internet, today announced that it has demonstrated a record-breaking single-carrier 800G long-haul high-speed transmission result, successfully transmitting 120-Gbaud wavelength-division multiplexing (WDM) 16QAM signals over 1,200-kilometre terrestrial fibre links. This is the first experiment with the highest symbol rate reported so far for electrical time division multiplexing (ETDM)-based 16QAM signals. The result, once again, sets a benchmark for the global optical networking industry, boosting further development of new technologies and supporting the next-generation transport standard to cope with the exponential growth of IP traffic.

The successful test demonstrated the generation and WDM transmission of the highest baud rate single-carrier 120-Gbaud electronic time-division multiplexing (ETDM) polarisation-division multiplexing (PDM)-16QAM optical signals. Both transmitter-side, and optical pre-emphasis and receiver-side maximum likelihood sequence estimation (MLSE) are utilised to mitigate the narrow filtering effect caused by bandwidth limitation of the opto-electronic components. Twelve WDM channels at 150-GHz grid, each loaded with 960-Gb/s (800 Gb/s data signals & 20 percent forward error correction (FEC) emulated overhead bits) over 1,200km link based on the 100km-spans of TeraWaveTM optical fibre are demonstrated. The achieved data rate interface ensured spectral efficiency of 5.33b/s/Hz.

Dr. Jianjun Yu, the Chief Scientist at ZTE US Optical Lab and Fellow at The Optical Society (OSA), said: “Thanks to the high baud rate signals generation, transport interfaces with bit-rates of up to 1Tb/s will be achieved in the near future. We can expect that bit rates beyond 1Tb/s, such as 1.6Tb/s, will be introduced as Ethernet standard rates since it would be a logical upward path rate from the 400Gb Ethernet interface, which is based on high baud rate signals and high order modulation formats. ZTE has been relentless in pushing forward-looking research and development on the single carrier 400G transmissions and beyond, and we have key technologies for future Tb/s solutions.”

ZTE has long been committed to R&D in 400G/1T (and beyond) technologies, as well as their applications and has already provided several key innovations in this field. In 2013, ZTE completed data signaling at speeds of 400Gb/s over a distance of more than 5,000km, through 25 reconfigurable optical add-drop multiplexer (ROADM) nodes without electrical repeater. In 2014, ZTE achieved 20 dense wavelength division multiplexing (DWDM) channels of 400Gb/s single-carrier polarisation-division multiplexing-quadrature phase shift keying (PDM-QPSK) signals to successfully transmit to 3,600km in standard single-mode fibre when the spectrum efficiency is improved to 4b/s/Hz. In 2015, ZTE US Optical Lab collaborated with OFS America to realise a 400Gb/s single-carrier PDM-QPSK signal transmission over 10,000km, a world record for 400Gb/s transmission. In January 2016, together with T-Mobile Austria, a top-level telecom operator in Austria, ZTE successfully completed a 10G/100G/400G hybrid transmission test on existing networks, indicating that 400G optical transport networks (OTNs) had become available for complex long haul applications.

About ZTE:

ZTE is a provider of advanced telecommunications systems, mobile devices, and enterprise technology solutions to consumers, carriers, companies and public sector customers. As part of ZTE–s M-ICT strategy, the company is committed to provide customers with integrated end-to-end innovations to deliver excellence and value as the telecommunications and information technology sectors converge. Listed in the stock exchanges of Hong Kong and Shenzhen (H share stock code: 0763.HK / A share stock code: 000063.SZ), ZTE–s products and services are sold to over 500 operators in more than 160 countries. ZTE commits 10 per cent of its annual revenue to research and development and has leadership roles in international standard-setting organizations. ZTE is committed to corporate social responsibility and is a member of the UN Global Compact. For more information, please visit

Yang Yan

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