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Fujitsu to reveal terabit optical transport system at MWC

(2023/02/24)


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 CO 2 emissions across the network.

The [1]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.

[2]

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.

[3]

[4]

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.

[5]

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.

[6]Bosch-backed VCs pour more funds into Brit quantum silicon chips

[7]IBM cheapens Oracle by delivering promised power-up for some POWER servers

[8]Classiq to school academia in quantum computing with help from Microsoft

[9]Fujitsu re-org sparks alphabet soup splatter: GSBG splits into GTSBG and GBSBG

It also makes use of forward [10]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 [11]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 [12]MWC Barcelona conference from February 27 to March 2, and then at the Optical Fiber Communication ( [13]OFC ) gathering in San Diego from March 7 to March 9. ®

Get our [14]Tech Resources



[1] https://www.fujitsu.com/us/products/network/products/1finity/index.html

[2] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_onprem/networks&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=2&c=2Y-lBkk1gXXq5MqayImclBQAAAJI&t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0

[3] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_onprem/networks&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44Y-lBkk1gXXq5MqayImclBQAAAJI&t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0

[4] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_onprem/networks&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=3&c=33Y-lBkk1gXXq5MqayImclBQAAAJI&t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0

[5] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_onprem/networks&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44Y-lBkk1gXXq5MqayImclBQAAAJI&t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0

[6] https://www.theregister.com/2023/02/21/quantum_motion_funding/

[7] https://www.theregister.com/2023/02/15/ibm_power_24_core_module/

[8] https://www.theregister.com/2023/02/09/classiq_microsoft_academic_program/

[9] https://www.theregister.com/2023/02/06/futisu_re_org_gbsbg_gtbsg/

[10] https://www.sciencedirect.com/topics/engineering/raman-amplification

[11] https://fujitsu.lookbookhq.com/1finity-ultra-optical-system-web/1finity-ultra-optical-system-solution-brief

[12] https://www.mwcbarcelona.com/

[13] https://www.ofcconference.org

[14] https://whitepapers.theregister.com/


If that's really true

DS999

Going 6000 km without regeneration would make a lot of undersea links much cheaper as they wouldn't need the 10kV they carry to power amplifiers. Transatlantic links would be free from that expense.

Or is 'regeneration' separate from amplification?

Re: If that's really true

Jock in a Frock

Regeneration is indeed different from amplification. Regeneration is an Optical-Electrical-Optical process to reshape and retime the signal, whereas amplification is a purely optical process

So the 6000km reach will still require amplification.

Re: If that's really true

Kernel

Edit: Bugger!!! - Jock beat me to it while I was trying to write a comprehensive answer :)

Regeneration an amplification are different - amplification is an analogue process, and, just like audio amps, optical amps introduce noise, distortion, etc each time the signal is amplified. Amplification occurs in the aggregated optical domain and the amplifiers, being an analogue device, are signal rate and content agnostic. I've worked with systems where there were different signal rates being carried by different wavelengths. An amplifier has no access to the signal content and can't even read the optical transport section overhead data - at this level the data stream for managing the amplifiers is carried on a separate wavelength that is dropped and inserted at each amplifier site.

Regeneration is a process in which the analogue optical signal is demodulated, optical transport section overheads removed, the individual wavelength payloads extracted, regenerator section overheads removed, re-shaped, re-timed, repackaged (new regenerator section overheads wrapped around payload) and then goes through the process to be sent on as an aggregate analogue optical signal again. Regeneration happens in the electrical domain and as a result regenerators must be designed for the specific signal rate and protocol they are regenerating.

Regenerator spacing is determined by how far can you go and how many times can the signal be amplified and still extract useful information at the end of it - this is largely determined by the modulation method chosen and the ability of your chosen forward error correction mechanism to recover errors.

Amplifiers are generally spaced at around 60~80km, depending on the system design, especially in terrestrial systems where if possible you want to put them in sites you already own. Submarine cable power feed voltages are determined by the number of amplifiers equipped - each one needs 50V at around 2.5 amps. I have seen systems that feed around +25kV for one end and -25kV from the other, for a total voltage drop of around 50kV end to end.

I've been out of the industry for about 3 years now, so some of this may be slightly dated.

Time flies like an arrow. Fruit flies like a banana.