Huawei launched the world's first 1T WDM line card.
The line card delivers 800-km transmission based on common G.652 fibers and erbium-doped fiber amplifiers (EDFAs), but without regeneration. It can encapsulate client signals of any rate into an OTN-based 1 Tbps channel for transmission.
A demonstration was shown at the Next Generation Optical Networking Forum last week using Huawei's flagship OSN 9800 platform.
Huawei said its line card uses Optical Digital Signal Processing (oDSP) algorithm for processing high-speed signals. Switching between short-haul metro mode (ultra-high-capacity transmission) and ultra-long-haul backbone mode (ultra-long-haul transmission) can be implemented through software-based modulation scheme reconfiguration. The short-haul metro mode reaches a capacity of more than 20 Tbit/s per fiber, nearly triple that of current mainstream commercial 100G systems. The ultra-long-haul backbone mode supports more than 10 Tbit/s transmission per fiber over a distance of 3,000 km.
Huawei noted that it has deployed over 200 commercial 100G networks worldwide to date.
- In 2013, Huawei demonstrated a 40T Wavelength Division Multiplexing (WDM) prototype at the OFC/NFOEC 2013 event in Anaheim, California. The prototype supports simultaneous transmission of 20 C-band optical channels running at 2 Tbps, providing an industry-leading capacity of up to 40 Tbps per fiber. Huawei cited three innovations in its platform:
The combined use of Electrical Orthogonal Frequency Division Multiplexing (eOFDM) and frequency-domain Hybrid Quadrature Amplitude Modulation (QAM) technologies substantially improve spectrum efficiency to 10 bit/s/Hz.
The combined use of Flex-Optical Digital Signal Processing (Flex ODSP) and Hybrid Soft-/Hard-Decision Multi-level Coding (HMLC) technologies extend the transmission distance to beyond 1,000 km over common single-mode fiber and Erbium-Doped Fiber Amplifiers (EDFAs).
Software-implemented transceiver technology allows optical modulation formats such as Quadrature Phase-Shift Keying (QPSK), 16QAM, 32QAM, and 64QAM to be adjusted or combined, achieving a configurable transmission rate and distance for each service. As a result, dynamic service needs in varied scenarios can be easily met.
- In 2012, Huawei completed a 2 Tbps WDM field trial with Vodafone, achieving up to 3,325 km transmission for 2 Tbps signals. The 40T WDM prototype is another major breakthrough in high-speed transmission proving current commercial optical networks will be ready for the upcoming flood of digital traffic.