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WDM prototype offers capacity up to 40Tb/s/fibre

Posted: 25 Mar 2013 ?? ?Print Version ?Bookmark and Share

Keywords:WDM prototype? wavelength division multiplexing? eOFDM? QAM? HMLC?

Huawei unleashed a 40T wavelength division multiplexing (WDM) prototype that supports simultaneous 2Tb/s transmission of 20 C-band optical channels, offering capacity of up to 40Tb/s per fibre. The prototype is built on three innovations in the field of high-speed transmission, indicated the company.

The combined use of electrical orthogonal frequency division multiplexing (eOFDM) and frequency-domain hybrid quadrature amplitude modulation (QAM) technologies substantially improve spectrum efficiency to 10bit/s/Hz. Additionally, 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 1,000km over common single-mode fibre and erbium-doped fibre amplifiers (EDFAs), noted Huawei.

Furthermore, 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.

The 40T WDM prototype claims to be a major breakthrough in high-speed transmission proving current commercial optical networks will be ready for the upcoming flood of digital traffic, Huawei added.

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