PIC Technologies for Intra- and Inter- Distributed DC and ... · HUAWEI TECHNOLOGIES CO., LTD. PIC Technologies for Intra- and Inter- Distributed DC and Cloud-Access Ultra-High Capacity

HUAWEI TECHNOLOGIES CO., LTD.

PIC Technologies for Intra- and Inter-

Distributed DC and Cloud-Access Ultra-

High Capacity Flex OTN

Presented @ 4th Symposium on Optical Interconnect for Data Centers

© Huawei Technologies – All Rights reserved 2016

Le Binh, European Research Institute, GRC

Huawei Technologies

PIC = Photonic Integraed Circuit

= Photonic InterConnection

HUAWEI TECHNOLOGIES CO., LTD.

Evolutionary Networks: Flattening Telcom Cloud Nets and DC Centric

Nets

Ultra-fast

Giga fiber/copper/co-ax/Wifi

E2E IP + Optical 400G/2T

Metro Core (coherent)

Backbone core

(Coherent)

Data Centers

(distributed/concentric)

Simplified

•No Congestion, Lower

Concentration Ratio

•Legacy Consolidation ,

Flattened Hierarchy

Agile

•SDN / NFV Enabled

•Telco OS

Cloud CO Cloud Edge

APP/Service

Core DC

Edge DC CO DC

Access

(DD/Coherent)

MIMO antenna

5G

Where and What PIC Technologies ????

APP

APP

Page 3

Transmission capacity/fiber and demands

10/11/2016

1980 1990 2000 2010 2020 2030 2040

106

109

1012

1015

1018

SSMF

WDM

WDM: EDFASSMF+DCFED

FA +Noises OA noises

Non-DCF Co-ORx DSP

SE –M-QAM

Flex Co-ORx DSP

Ext C- L-band Data Center Nets

Clouds – CRAN

Intra-Interconnection

4K Video

5G

IoT

Data Center Nets Flattened Telcom Nets

Inter DC-Telcom Net Inter-connections

100G-400G DWDM Deployment

Flex OTN (100G – 2-3Tbps) DC Networking

Nets-Interconnections

Multiple-fibers

Page 4

25-30Gbps Electrical 56Gbps Electrical? 50-56Gbps

Backplane Rate

SerDes Approach NRZ + FEC (Optional) SE-HoM? + FEC

Analog Tx / Digital Rx

10-13 pJ/bit (16nm)

Analog Tx / Analog Rx

7-10 pJ/bit (16nm)

Digital Tx / Digital Rx

>15 pJ/bit (16nm)

56-112Gbps Optical

PAM + FEC Optical Solution

28nm/16nm 7nm Photonics/simple photonics

CEI 56G-USR: ~2 pJ/bit

Optical I/O: ~5 pJ/bit

Optical I/O vs. Electrical I/O

Save Energy, Longer Reach

Optical

CEI 56G-LR: 10-13 pJ/bit (16nm)

Optical I/O About 7 pJ/bit

Electrical I/O About 10-13 pJ/bit (16nm)

Page 5

Optical switching using PIC micro-rings

Massive capacity Optical Interconnect Flex Rates/BW Channels

Page 6

Basic micro-ring net for 4-way switching (4W-MRSw)

Modulated channels

Multi-lamdas

vSW1 vSW2

Port 2 (out)

Port 3 (out)

Port 4 (out)

vSW1 & vSW2: voltage controlled

Switch signals

R1,R2, R3: micro-ring resonators

(driven by dual electrodes in push pull

Mode wideband filtering/passband

CSw = coupling switch

Switching principles

To switch lamda1 to port 2 (out) : Use R3

to resonate the required wavelength

Channel to R# and then switching out by

using the CSw3 coupler.

Similar for switching to Port 3 and 4 –

use rings R!, R2 or R3

Flex R1

Flex R3

Flex R2

CSw3

CSw2

CSw1

vSW2

Modulated channels

Multi-lamdas

Page 7

Hybrid PIC : Multi-Tbps super-channel optical transmitter

Page 7

Wideband Comb Gen

Narrow linewidth

Bank of

Cascade

Micro-ring pn Mod

Data-channels

Modulated channel

To be launched to SSMF

Page 8

Large-size small form-factor Switching matrix using 4-way micro-ring switches: applications Photonic switching in photonic kernal Data Centers

Multi-lamda selective

switched output port 3


switched output ports 4 Multi-lamda selective


Modulated channels

Multi-lamdas

Modulated channels

Multi-lamdas

Modulated channels

Multi-lamdas

Micro-ring 4-way switch

(4W-MRSw previous slide)

Multi-bank elect.

switching signals

Micro-rings

SOI waveguides

Page 9

Large-size small form-factor Switching matrix using 4-way micro-ring switches: Apps Photonic switching/ distribution of ref. channels in photonic kernel (core) Data Centers




switched output ports 4



QD Comb Laser 1

Micro-ring 4-way switch

(4W-MRSw previous slide)

Multi-bank elect.

Switching/modulation signals

QD Comb Laser ith

QD Comb Laser N

Modulated channels

Multi-lamdas

Modulated channels

Multi-lamdas

Modulated channels

Multi-lamdas

Page 10

Flex Optical Filters by Cascade & Parallel Ring and MZDI

GND

ck

IN

OUT

dk dk

PS 1

(b) All-pole stage

(Resonant)

(tuning – piezo-elect)

PS 2

TC

m-Ring delay T

V1+

V2 +

OUT 1

OUT 2

(b) All-zero stage

(Interferometric)

Tuning piezo-electric

PassBands: 50, 75, 275, 375 GHz

V+

GND

GND

V+

1 2

1 1 2

ˆ ˆ ˆ ˆ( ) ( ) ( ) ( )ˆ ˆˆ ( ) .......ˆ ˆ ˆ ˆ( ) ( ) ( ) ( )

Mk M

k k M

z z z z z z z zH z A A

z p z p z p z p

- - - -

- - - -

OPTICAL FILTER BANDPASS FILTER Z-DOMAIN TRANSFER FUNCTION

Cascade - Sampling time = optical delay line (propagation)

Formed by Common Standard z-transfer form

1540 1542 1544 1546 1548 1550 1552 1554 1556 1558 15600

0.2

0.4

0.6

0.8

1

1.2

Magnitude Response of Butterworth Bandpass Optical Filter

Wave Length (nm)

Mag

nitu

de

Filter Order = 8

Passband Ripple = 0.5 dB

Stopband Ripple = -20 dB

1540 1542 1544 1546 1548 1550 1552 1554 1556 1558 15600

0.2

0.4

0.6

0.8

1

1.2

Magnitude Response of Chebyshev Bandpass Optical Filter

Wave Length (nm)

Magnitude

Filter Order = 6

Passband Ripple =0.5 dB

Stopband Ripple = -20 dB

1540 1545 1550 1555 15600

0.2

0.4

0.6

0.8

1

1.2

Magnitude Response

Wave Length (nm)

Mag

nitu

de

Photonic Switching Kernel + Er:OWA + High Res. OSA+ MCU

Page 11

Si-integrated Tunable

OXC Matrices

Er:

O

WA

Er:

OW

A

Planar Er: OWA

Er: OWA

optical fibers transporting

flex channels (North/South/East/West

Cloud DC

High Res. AWG/ PD Bank

PD Bank


PD Bank


PD Bank


PD Bank

CONTROL

DSP

CONTROL

DSP

CONTROL

DSP

CONTROL

DSP

PD Bank

Fiber flex

channels

Fiber flex

channels

Fiber flex

channels

Fiber flex channels

CLOUD

F/RAN

CLOUD

Fiber/RAN

CLOUD

F/RAN

CLOUD RAN

Planar integrated Er:Al2O3 : gain and absorption

Page 12 Gain /cm factor versus % Er:conc. pumped by 80mW 980nm

Waveguide section EDWA Spiral structure section

Photonic Section

EDWA

980nm PL

Integrated Photonic Components

› Optical channels of Flex BW/Rates be

detected to feed MCU to control switching

at variable BW

› Setting routing path and path BW via ring

&MZ filtering net

› Si PIC play the major part in the

convergence of wireless and optical

technologies for economic.

› Planar Optical Amps to compensate losses

Page 13

HUAWEI TECHNOLOGIES CO., LTD. HUAWEI Confidential Page 14

84 Channels Edge Coupling Prototype: Loopback Testing

3.5mm

84 Channel

Ceramic substrate

SiPh chip 12 x MCF

input

output

Each 7-core MCF could fanout to 7 SMFs

Fan-out 1 x 7-core MCF

7 x SMF


84 Channels Surface Coupling Prototype

› 84-ch are coupled in area of 6mm x 2mm, density is 7-ch/mm2

› One-pass loss of 84-ch range from 4.1dB to 6.9dB

SiPh

Loopback

Circuit with

GCs3D

Interposer

10mm

9mm

6mm2mm

MCF Array

3D Interposer

900um

1270um

Channel Number

On

e-p

as

s In

se

rtio

n L

oss


Acknowledgement

› The author thanks to Dr. Song Xiaolu of Huawei HQ Shenzhen for the use of the two

slides on out coupling and multi-core or few-mode fibers to further increase the

routing capacity.

Page 16

Page 17

Together, the top Optical Interconnect

Technologies

http://www.huawei.com/

PIC Technologies for Intra- and Inter- Distributed DC and ... · HUAWEI TECHNOLOGIES CO., LTD. PIC Technologies for Intra- and Inter- Distributed DC and Cloud-Access Ultra-High Capacity

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