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Fujitsu to reveal terabit optical transport system at MWC

Promises 6,000km without regeneration – cutting down on transponders

MWC Fujitsu is preparing to ship an optical transport platform designed for terabit networking over long distance, claimed to be capable of lowering power consumption and reducing CO2 emissions across the network.

The 1FINITY Ultra Optical System comprises the T900 Series Transponder and L900 Series Optical Line System, and is capable of data rates of 1.2 terabits per second (Tbps) using a single wavelength, and future upgrades will take this to 1.6 Tbps, Fujitsu said. Both are rack-mounted systems.

The platform will be available in the first half of Fujitsu's fiscal year 2023, which runs from April 1. It will target communications service providers (CSPs) and cloud infrastructure providers (CIPs) globally, starting with customers in Japan, North America and also Europe.

According to Fujitsu, the T900 Series Transponder can deliver data rates of 1.2 Tbps on a single wavelength, thanks to a newly developed high-performance DSP and ultra-high-speed Coherent Driver Modulator (CDM) to enable 135 Gbaud modulation.

This 5nm transponder technology lowers the power per bit by 39 percent compared to the previous generation 100 Gbaud 7nm technology, according to Fujitsu figures.

The T900 Series Transponder also incorporates closed-loop liquid cooling technology.

The L900 Series Optical Line System features Fujitsu’s continuous C+L ROADM architecture which allows for an expansion of the transmission capacity per optical fiber by handling multiple wavelength bands (C-band, L-band) in a single product.

It also makes use of forward Raman amplification to amplify the signal as it travels along the fiber, compensating for any signal loss and extending the reach. This allows a 400G wavelength to be transported up to 6,000km without regeneration, according to Fujitsu data.

These technologies will are intended to support customers in improving the scalability of their network infrastructure, and - we're told - will also contribute to the decarbonization of the entire optical network because the system requires fewer transponders and therefore decreases power consumption.

Fujitsu will be showing its new optical transport at the MWC Barcelona conference from February 27 to March 2, and then at the Optical Fiber Communication (OFC) gathering in San Diego from March 7 to March 9. ®

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