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Huawei, a leading global information and communications technology (ICT) solutions provider, and KPN International, a leading telecommunications and ICT provider, announced the successful completion of the world’s first pan-European 400G field trial. The OTN-based 400G network spans 540 km between Amsterdam, the Netherlands, and Dusseldorf, Germany. There is ample margin in the system, confirmed by adding 300km in the end terminal station. No longer confined to the laboratory, the successful trial of 400G long-haul transmission on a live network marks a major leap forward for 400G in the region.

The exponential growth of traffic on the carrier backbone is accelerating the large-scale commercial deployment of 100G. The Huawei 100G solution stretches over 55,000 km worldwide, with the high-speed transport industry paying increasing attention to the technology beyond 100G with a keen eye on 400G.

The 400G transmission is tested on KPN International’s pan-European WDM backbone network, which was first deployed by Huawei in 2008 using NG-WDM products and first to be upgraded to coherent 100G by Huawei in 2011. The link tested is one of the busiest links, and the trial confirms the results obtained earlier in laboratory environments and further confirms that the transmission method used is a highly promising technique. The next step is to continue tests with onboard DSP functionality.

Fujitsu says it has collaborated with NTT Communications Corp. on a successful field test of coherent 100-Gbps DWDM transmission via a commercial fiber-optic cable between Tokyo and Osaka. The test clears the way for full network construction using the 100-Gbps DWDM systems.

While Fujitsu has implemented coherent 100-Gbps DWDM systems outside of Japan (see, for example, “Mid-Atlantic Crossroads uses Fujitsu FLASHWAVE 9500 for 100-Gbps network”), the field test opens the door for its first deployment in Japan. The test was conducted using dispersion-shifted fiber in the L-Band, which is often used in Japan for long-haul transmissions.

The field test simulated real-world situations, such as fiber-optic cable changes in accordance with transmission-circuit route changes and adding/removing wavelengths. The results confirmed that a quality sufficient for commercial operation could be achieved at 8 Tbps (100 Gbps x 80 multiplexed wavelengths). The test also demonstrated that the system could compensate automatically when adding chromatic dispersion and polarization mode dispersion to actual transmission circuits.

Digital coherent transmission technology makes use of results achieved in two previous research projects, "R&D on High-speed Optical Transport System Technologies" and "R&D on High-speed Edge Node Technologies," which were supported by the Ministry of Internal Affairs and Communications.

Huawei, a leading global information and communications technology (ICT) solutions provider, today announced that Dr. Yuanqiu Luo, Huawei's top optical access technology expert, was appointed an editor for physical-layer standards in NG-PON2. The Full Service Access Network (FSAN) working group – formed by major telecommunications service providers and system vendors to work on fiber to the home architectures – has identified TWDM-PON as the primary solution for NG-PON2, which contributes significantly to the advancement in the field of NG-PON2 standardization.

In September 2011, Huawei released a 40G-GPON prototype built on TWDM-PON, which amply demonstrated its feasibility and application potential.

ZTE Corp. is showing off what it asserts is the first multi-application 400-Gbps/1-Tbps DWDM prototype device at the 16th WDM & Next Generation Optical Networking Forum in Monaco this week.

The device can perform seven network applications via a variety of modulation formats, ZTE asserts. For example, the DWDM prototype offers a multi-subcarrier orthogonal frequency-division multiplexing (OFDM) 400G/1T approach for ultra-long-haul applications. It also can serve metro applications via a 16-QAM approach, or long-haul applications as a Nyquist WDM platform.

At 100 Gbps, ZTE the DWDM/Optical Transport Network (OTN) system supports C-band 80-wavelength applications via PM-QPSK and coherent detection and soft-decision forward error correction (FEC).

“ZTE is fully prepared to deploy solutions, products, and services for the large-scale commercial global rollout of 100G and ultra-100G,” said ZTE Bearer Network Product Line General Manager Chen Yufei.