& cplSiteName &

Ciena Pushes Ahead to 400G

Craig Matsumoto
3/1/2012
50%
50%

Ciena Corp. (NYSE: CIEN) is announcing its next 100Gbit/s optical processor on Thursday, readying itself for the 400Gbit/s generation.

The WaveLogic 3 chip promises to extend 100Gbit/s reach to 2,500 km without regeneration, through technologies including soft forward error correction (FEC).

The chip also uses a digital signal processor (DSP) on the transmit side. This opens the possibility to mess with 100Gbit/s wavelengths, squashing them into a space smaller than the usual 50GHz spacing, so that more wavelengths can fit on a fiber.

WaveLogic 3 also takes advantage of increased processing smarts. For example, it can be programmed to make tradeoffs -- improving latency by lightening up on FEC, and therefore giving up some reach.

Ciena expects to have customers running live traffic on WaveLogic 3 this year.

Why this matters
This means the 400Gbit/s generation is almost underway, although Ciena expects it to happen in a limited fashion and doesn't expect customer deployments until 2013.

The real importance is on the 100Gbit/s side, where longer reach and lower power are going to be key topics this year. Cisco already declared the ability to run 100Gbit/s wavelengths for 3,000 km without regeneration, as EANTC verified in its recent test of Cisco CloudVerse, and we'll probably hear plenty more about 100Gbit/s improvements during OFC/NFOEC next week.

A couple of other things to note: Ciena will continue using an in-house chip for its next 100Gbit/s generation, showing the power of vertical integration.

And with the transmit DSP, and the ability to squeeze more wavelengths together, it's setting up applications for flexible-grid reconfigurable optical add/drop multiplexers (ROADM)s in the 100Gbit/s generation. It's suspected that a flexible grid will be useful as the industry approaches 1Tbit/s.

Ciena put together this video to show the thing in action:

For more
Keep up with our coverage on the Light Reading OFC/NFOEC site.

— Craig Matsumoto, Managing Editor, Light Reading

(7)  | 
Comment  | 
Print  | 
Newest First  |  Oldest First  |  Threaded View        ADD A COMMENT
chandan kumar
50%
50%
chandan kumar,
User Rank: Light Beer
12/5/2012 | 5:40:56 PM
re: Ciena Pushes Ahead to 400G


The real challenge for R&D is to match reach of 400G and 100G with that of 40G and 10G so that operators can plan smooth upgrades without increasing touch points. Similarly 1T per lambda later to match reach of 100G and 400G

opticaljunkie
50%
50%
opticaljunkie,
User Rank: Light Beer
12/5/2012 | 5:40:55 PM
re: Ciena Pushes Ahead to 400G


ALU never said if they have a soft FEC, so that's probably no? 

Pete Baldwin
50%
50%
Pete Baldwin,
User Rank: Light Beer
12/5/2012 | 5:40:55 PM
re: Ciena Pushes Ahead to 400G


I think I left this part unclear: You need two Wavelogic 3 chips to make 400G; each one does 200G. So you'd need two lasers as well.


Sterling Perrin at Heavy Reading points out that this is Ciena's debut of a single-carrier 100G (versus dual carrier in one 50GHz spacing).  So Ciena will catch up to Alcatel-Lucent on that front.

IJD
50%
50%
IJD,
User Rank: Light Beer
12/5/2012 | 5:40:51 PM
re: Ciena Pushes Ahead to 400G


Other vendors (e.g. NEL) already have 100G single-carrier transceivers with soft FEC, so this isn't new -- what is new is integrating the TX MUX/DAC function, but it's not a surprise given Ciena's paper about their DAC published last year.

rhr
50%
50%
rhr,
User Rank: Light Beer
12/5/2012 | 5:40:45 PM
re: Ciena Pushes Ahead to 400G
Ciena will need two WaveLogic 3 chipsets for 400Gbps. The WaveLogic 3, on a 32nm process, is a two-device chipset (the transmit and receive coherent DSP ASICs). And to your point, Chandan, Ciena says 400G will have a metro regional reach while 200Gbps will achieve 750-1000km. Impressive but as you say, not 100Gbps reaches yet.
rhr
50%
50%
rhr,
User Rank: Light Beer
12/5/2012 | 5:40:44 PM
re: Ciena Pushes Ahead to 400G
Good point - I agree. That said, I would think metro regional is up to 1000km but the implication from Ciena is that the reach is somewhat less than that achieved by a 200Gbps single channel.
IJD
50%
50%
IJD,
User Rank: Light Beer
12/5/2012 | 5:40:44 PM
re: Ciena Pushes Ahead to 400G


Doesn't make sense -- Ciena's 200G uses QAM16 in a 50GHz channel (hence the shorter reach), surely their 400G uses 2 bonded 200G QAM16 50GHz channels so the reach will be the same?


(I doubt that it uses QAM256 in 1 channel, OSNR and reach would be awful...)


IIRC ALU's paper at ECOC used 45Gbaud QAM32 to do 400G in a single channel with 75GHz optical bandwidth, this would presumably have shorter reach than QAM16 but would need faster sampling (90Gs/s?) wider bandwidth (30GHz?) ADCs and DACs.

Featured Video
From The Founder
Light Reading founder Steve Saunders talks with VMware's Shekar Ayyar, who explains why cloud architectures are becoming more distributed, what that means for workloads, and why telcos can still be significant cloud services players.
Flash Poll
Upcoming Live Events
May 14-16, 2018, Austin Convention Center
May 14, 2018, Brazos Hall, Austin, Texas
September 24-26, 2018, Westin Westminster, Denver
October 9, 2018, The Westin Times Square, New York
October 23, 2018, Georgia World Congress Centre, Atlanta, GA
November 7-8, 2018, London, United Kingdom
November 8, 2018, The Montcalm by Marble Arch, London
November 15, 2018, The Westin Times Square, New York
December 4-6, 2018, Lisbon, Portugal
All Upcoming Live Events
Hot Topics
Is Gmail Testing Self-Destructing Messages?
Mitch Wagner, Mitch Wagner, Editor, Enterprise Cloud, Light Reading, 4/13/2018
BDAC Blowback – Ex-Chair Arrested
Mari Silbey, Senior Editor, Cable/Video, 4/17/2018
Verizon: Lack of Interoperability, Consistency Slows Automation
Carol Wilson, Editor-at-large, 4/18/2018
AT&T Exec Dishes That He's Not So Hot on Rival-Partner Comcast
Mari Silbey, Senior Editor, Cable/Video, 4/19/2018
US Govt. Bans Domestic Component Sales to ZTE
Dan Jones, Mobile Editor, 4/16/2018
Animals with Phones
I Heard There Was a Dresscode... Click Here
Live Digital Audio

A CSP's digital transformation involves so much more than technology. Crucial – and often most challenging – is the cultural transformation that goes along with it. As Sigma's Chief Technology Officer, Catherine Michel has extensive experience with technology as she leads the company's entire product portfolio and strategy. But she's also no stranger to merging technology and culture, having taken a company — Tribold — from inception to acquisition (by Sigma in 2013), and she continues to advise service providers on how to drive their own transformations. This impressive female leader and vocal advocate for other women in the industry will join Women in Comms for a live radio show to discuss all things digital transformation, including the cultural transformation that goes along with it.

Like Us on Facebook
Twitter Feed