optical integration and dsp in next generation networks market... · optical integration and dsp in...

Atul Srivastava

CTO, NTT Electronics - America

Optical Integration and DSP

in

Next Generation Networks

Market Focus ECOC 2013

NTT Electronics Corp. ©2013 – proprietary & confidential

Outline

• 100G Deployment

– Rapid Growth in Long Haul

– Role of Modules

• 100G Module Standards and their Applications

– Gen1 5x7 MSA

– Gen2 4x5 MSA

– Pluggable Modules (CFP, CFP2…)

• Challenges for DSP and Optical Components

– Lower Power Dissipation

– Smaller Size

– Packaging

• Discussion

2

NTT Electronics Corp. ©2013 – proprietary & confidential 3

Current Landmark Hero Result

1.01-Pb/s (456.8Gb/s x 222ch x 12 cores) transmission over 52-km MCF

with the aggregate SE of 91.4 b/s/Hz (7.6 b/s/Hz x 12 cores)

1:4

Rx

12-core MCF

52 km

C+L+

111C

h

Tx1

Tx2

CPL Pol

MUX OTF

1:4

1

:4

1:2

1

:2

12

:1 F

an In

1:1

2 F

an O

ut

C+L+

C or L+

111C

h

OTF

Switch

X-pol. Y-pol.

Ch60, Core1,sc-6

10

9

8

7

6

Q-f

acto

r (d

B)

162016001580156015401520Wavelength (nm)

core1 core2 core3 core4 core5 core6 core7 core8 core9 core10 core11 core12

T. Takara, et al., ECOC2012, Th.3.C.1 (PDP).

• 1Tb/s experiment in OFC 1996

• In 16 years 1000x increase

• ~10x capacity increase every 5 years

• Is it sustainable??

Courtesy: Dr. Suzuki, NTT


Commercial Transmission Systems

• Current Systems – 100Gb/s: Transmission, Cross-connect and IP Router interface rates

have coalesced

– 10Tb/s Capacity 100 Ch @ 100Gb/s 50Hz

• DP-QPSK, 28Gbaud, 4bits/symbol

• Coherent Detection with ADC/DSP

• Future Systems – 2015 - 400Gb/s?

– 2020 - 1Tb/s?

4

Year 1990s past

2000 past

2010 present

2020 future

System Capacity 20 - 160 Gb/s 1 Tb/s 10 Tb/s 100Tb/s

Channel Rate 2.5 - 10 Gb/s 10 Gb/s 40 - 100 Gb/s 1 Tb/s!

No. of WDM Channels 8, 16, 40 100 100 - 160 100

Spectral Efficiency .025 - .05 0.2 2 20!


Long Haul 100G Growth

2015-16: >100K LH Interfaces

with ~1B NEM sales

10K

25K

60K

Number of LH Interfaces

84K

125K

Ref: A. Schmitt, Infonetics, OIF meeting Jan. 2013


Current OIF LH 100G MSA

module:

6

• Size: 5 in. x 7 in.

• Power Dissipation: 80 W


NEL product lineup for 100G linecard

Receiver

MUX Modulator

LD

LD（LO)

OTN Framer

CFP (100GE)

DSP-LSI Fiber

Driver

2nd GEN High performance

2nd GEN Low power

SFF, same side I/O

105 x 13.5 x 7 mm

DP-QPSK modulator

35 x 20 x 6.4 mm

m-iTLA

Integrated receiver

17 x 30 x 6 mm

Integration is key to reducing size and power dissipation


100G Modules and Line cards: Enabling higher card density

5x7 MSA

100W

Size (Smaller)

Current OIF MSA 1.1

Future

(CFP/ CFP2)

2013 OIF MSA 2.0

Smaller Size Low Power

Power Consumption

8

Smaller Size Low Power

4x5 MSA

45W


Evolution of 100G modules: LH Applications

Module Power dissipation dominated by electronic

components such as DSP

and MUX

Module Size (width, depth,

height) determined by

optical components such as Tx and Rx

9

5”

4”

modulator

LD LD

Receiver DSP

Gen 1

5” x 7” Gen2

4” x 5”


Example of Module Layout

in the 100G Transmission Line Card

a) Transponder Framer

CFP

100G

LH MSA

(4”x5”,<40W)

b) Muxponder

XFP

×10

c) Regenerator Framer

100G

LH MSA

(4”x5”,<40W)

100G

LH MSA

(4”x5”,<40W)

DC/DC

Conv. Area

DC/DC

Conv. Area

DC/DC

Conv. Area

a) Transponder b) Muxponder c) Regenerator

5”x7”(Gen.1)

4”x5”(Gen.2)

100G

LH MSA

(4”x5”,<40W)

Module size required for the line card

10

Courtesy: Onaka, Fujitsu

The module with the size of 4”x5” can enable three kinds of the line cards


Multi carrier options for 400G and 1T systems

11

• Dual carrier 2x200G for 400G switching to DP- 16QAM

• Additional carriers can be added to make a 4 X 100G, or 10 X 100G, or 5 X 200G superchannel


Reach and Capacity Tradeoff

12

G. Bosco et al., JLT, vol.29, No.1, p.53, 2011


Reach and Capacity Tradeoff

13

GAP filled

by 8QAM

G. Bosco et al., JLT, vol.29, No.1, p.53, 2011


Smaller Integrated Components for smaller size

pluggable (CFP) modules

14

ASIC

iTx

100G CFP2/4 for Routers with high faceplate density


Pluggable Digital Coherent TRx

DSPs

CFP(optics + DSP inside)

RF connection CFP2: 8 modules/card

CFP4: 16 modules/card

Line card CFP2/4(only optics)

• Optics part will be separated from DSP

• CFP2/4 will be no more than single optical component


Breakdown of 100G module power dissipation

Gen1 MSA 4”x5” Gen2 MSA CFP target

DSP 35.0 20.0 12.0

MUX 6.5 0.0 0

Modulator(TEC) 0 0 1.0

Driver 10.0 7.0 3.0

ITLA(Tx&LO) 6.0 8.0 4.0

Receiver FE 3.5 1.5 1.5

MISC 2.0 1.0 1.0

DD-conv. 16.0 2.5 1.5

Total 79.0 W 40.0 W 24.0 W


100G Transceiver Module/DSP Power Dissipation

5”x7”

4”x5”

CFP 40nm CMOS

28nm

18-20nm


10 40 80 500 100 1000 >2000

Reach (km)

Gen2

4” x 5”

Gen1 5” x 7”

80

45

Power (W)

32

28

24 100G LR4

100G ER4 100G ZR

100G Coherent for Metro

- Regional 500-1000 km - Core 100-500 km - Access 40-100km

- Higher volume - Lower cost - High density

100G Transceiver Module Landscape


100G Coherent Metro Networks

19

Metro Regional

Metro Core

Long-Haul

Metro Access

• Long-Haul >1500, 6-8 ROADMs

• Metro-Regional

500-1000km; 16 ROADMs

• Metro-Core 100-500km; 24 ROADMs

• Metro-Access

40-100km

Typical Optical Specs: 16dB OSNR, 15,000ps/nm dispersion, 12ps PMD

Cost, Power and Size of module are key metrics for 100G Metro


Applications for each 100G coherent transceiver module

Datacom Telecom

Distance <100km <600km <600km >2000km

Application name ER, ZR Metro-access Regional, or metro-regional

Long haul

Optical topology Point-to-point (p-t-p)

p-t-p ROADMs (drop & continue)*

ROADMs (drop & continue)*, p-t-p

Number of TLAs 1 1 2 2

Chromatic dispersion compensation (ps/nm)

2,000 12,000 12,000 >40,000

Type of FEC HD-FEC (G.709)

(External)

HD-FEC (ex.

G.975.1) (External)

SD-FEC

(Internal)

SD-FEC (Internal)

Power consumption (W) 24 28 TBD 40

Module form-factor CFP CFP (tbd) 4” x 5” (tbd) 4” x 5”

Name of TRx module Coherent pluggable NG-Coherent LH

Note*) For ROADM applications, the drop & continue function is required, where a single wavelength is used

for broadcasting. In a transceiver module, transmitter wavelength is not necessarily the same as that of local

oscillator, therefore 2 tunable lasers are necessary in a module.

Interoperability on 100G 1. Expansion of 100G coherent technology

– The digital coherent technology is expanding from long-haul (LH) to short-reach (ZR) / metro-access (MA) applications. (Applications are shown in next page.)

• In ZR/MA application, pluggable optical modules will be used. Where, interoperability is mandatory because of replaceability.

• We would like to propose strong joint promotion of interoperability on 100G ZR/MA applications.

2. Modulation format and FEC – We think that the modulation format for 100G ZR/MA is QPSK.

• QPSK is only one standard and it is mature.

– GFEC will be used ZR and MA application.

• GFEC is already standardized, but eventually EFEC may be needed in MA. For such a case, a table of EFEC candidates could be the solution as in ITU-T G.975.1 (listing several EFECs). – EFEC single standard would be difficult because of vendors’ differentiator, as

in the past.

Latest News – 100G interoperability NTT Electronics and Acacia Communications Announce

Interoperability Mode of Operation in Next-Generation Coherent ASICs

London, UK, September 23, 2013 - ECOC2013 : NTT Electronics (NEL), the leading supplier of 100G coherent Digital Signal Processing (DSP) ASSP's to a variety of system/module manufacturers worldwide, and Acacia Communications, the leader in delivering intelligent transceiver modules for ultra-high speed fiber optic transmission to the telecommunications infrastructure industry, announced today that they have completed verification of an interoperability mode of operation between their next-generation Coherent Digital Signal Processing ASIC's. [Some network operators’ comments are quoted in the press release] "100G coherent application is to be extended from purely long-haul to metro to even short-reach applications, where the pluggable optical transceiver is attracting solution for those new applications," said a representative of Deutsche Telekom AG (DTAG). "Optical technology solutions like 100G are helping us continue to evolve and scale our network to support the next generation of high bandwidth services in an efficient and cost effective way," said Shamim Akhtar, Distinguished Architect at Comcast. "From the viewpoint of a network operator using 100G as well as a technology provider of 100G coherent solution, we, NTT, are happy to see this interoperability milestone," said Masahito Tomizawa, an executive manager of NTT Network Innovation Labs.


CFP Components configuration

CFP foot print can be achievable by using “m-ITLA” (already standardized) and “Gen 2 ICR” (newly proposed as close to Gen1 modification)

Accordingly, MSA components have broader market, and can be cost-effectively procured.

1 LD for Tx

and LO

Semiconductor

/ Polymer type

The same Rx as used for LH

(2nd gen Rx)

Modulator

Receiver

uITLA

DSP 30x30mm

Driver 14x8mm

CPL

≤ 55mm

≤ 90mm


Compact Optical Tx and Rx …DSP Assist

DSP

PBC

AD

C

DAC PBS

LD

LD

Tx

Rx

Coupling

loss

Chirp

Phase error

Extinction

ratio

Loss

imbalance

Vpi

Coupling

loss

Coupling

loss

Performance enhancement by DSP


Very Low Voltage MZ Modulator

25

Y. Ueda et al., We1.B.2, ECOC 2013


Modulation Characteristics

26

Y. Ueda et al., We1.B.2, ECOC 2013


Optical Integration is key to size and cost reduction

27


H. Tanobe et al., We2.B.3, ECOC 2013


Roadmap of Digital Coherent Products

31

2011 2012 2013 2014+

TRx

(OIF)

DSP

IRM

Modulator

T-LD

OTN-LSI

OIF-MSA-1.1

1st GEN: 5 x 7”, ~ 80 W

1st GEN

27 x 48 x 7 mm

1.2 W (typ.)

Silica-LiNbO3 hybrid integration

118 x 13.5 x 7 mm

1 slot/40G 2 slots/100G

2nd GEN High performance

30 x 30 mm ~ 25 W

37.5 x 37.5 mm

~ 45 W

1st GEN Low power

2nd GEN Low power

OIF-MSA-1.2

2nd GEN: 4 x 5”, ~ 45 W

400G support

2nd GEN

19 x 33 x 6.5 mm

SFF, same side I/O

105 x 13.5 x 7 mm

Filter-less

VOA-less

2 slots/400G

Dual-carrier mod.

ITLA

6.5 W

30.5 x 74 x 10.5 mm Narrow linewidth TLA

21×13×8 mm

Japan Project

1 slot/100G

15×6 ×6 mm

～2.5 W

Pluggable

(CFP2?)

3rd GEN

10 x 40 x 6 mm

Tunable transmitter

12 x 55 x 9 mm

m-ITLA

100G-OTN-LSI

★Connection w/DSP


Thank You !! Questions?

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