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GigaWaM — a Cost-Effective WDM-PON System

Christian Mikkelsen Ignis Photonyx

February 2011

1

GigaWaM: FP7 project

ParticipantsAifotech GmbH assembly house, GermanyDTU Fotonik university, DenmarkEricsson equipment, SwedenficonTEC GmbH assembly equipment, GermanyFraunhofer ILT research, GermanyIgnis Photonyx A/S PLCs, DenmarkIgnis Syntune AB tuneable lasers, SwedenVertilas GmbH VCSEL lasers, Germany

Nor-Tek project management, Norway

Ends April 1, 2012

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About Ignis

PLC splittersAthermal AWGsAWG chipsTunable lasers

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Wafer Fab in Denmark (43 employees)

Packaging and sub-contractors China (1 employee)

Splitter fab (Fi-ra) in Korea(161 employees)

Where we areTunable Laser and transmitter fab in Sweden

(40 employees)

Packaging and Testing ofIntegrated Optical Modules

Canada (4 employees)

HQ in Norway

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Wavelength Division Multiplexing-PON

Dedicated wavelengths for each (group of) subscriber

Is there a need?WDM-PON makes sense if ...

sufficient need for bandwidthneed for dedicated bandwidth (privacy)need better power budget

Common concernsProhibitive costTime-scale

Central Office (CO)

AW

G (1:64)

ONU

ONU

Rx

Tx

AW

G

(1:6

4)

DO

WN

UP

ONU

DO

WN

U

PBa

nd fi

lter Tx, λ1

Rx

Optical fiber link

1

64

TxTx

RxRx

Arra

y

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Goal

€120Price per subscriber to a system integrator, in 2012, in volume

Technical 64 channels, 1.25 Gbps 50 GHz channel spacing in C-band (~48.7 GHz in L-band)Reach 20 km over SMFImprovement of componentsIntegration of components

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GigaWaM architecture and power budget

MGY-SOA

......

PIN-PD PIN-PD

VCSEL

Cyclic AWG 64 channels athermal

......

Remote Node

Central Office Home Unit

........

Down: L-band

Up: C-band

monolithic

≥

dBm

≥

dBm

≥

dBm

≥

dBm

. . . . . . . .

≥

dBm

≥8.3 dBm

≥

dBm

≥3.2 dBm

1.25 Gbps x64 symmetric over 20 km SMF, *) Optical modulation amplitude

Actual sensitivity with PIN-PD: -28.5 dBm @ 22.8 km SMF

AW

G

AW

G

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Key technical challenges

Assembly Tight tolerances

Fast signals1.25 Gbps, (upgrade path to 2.5 Gbps and 10 Gbps)

HeatCompact design

Composite yields99% single yields, not enough

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GigaWaM’s answer: Cost breakdown€120

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GigaWaM: Home Unit technology

PLC diplexer separating C- and L-band

Tuneable laser

Photodiode

Electronics

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GigaWaM: Home Unit savings

Do away withWavelength locker

Using remote node AWG

CalibrationUsing remote node AWG

Optical isolatorManagement of reflections

CoolingOperation at elevated temperature

PackagingIntegration

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GigaWaM: System-wide tuning algorithm

MGY-SOA

......

PIN-PD PIN-PD

VCSEL

Cyclic AWG 64 channels athermal

......

Remote Node

Central Office Home Unit

........

monolithic

. . . . . . . .

AW

G

AW

G

Tuneable laserCalibration at wake-upContinuous tuning

VCSEL lasersContinuous tuning

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GigaWaM Central Office technology

64 channel integrated component

Flat-top AWG from Ignis Photonyx

Diplexers integrated on PLC

VCSELs in modules of 4 or 8

Photodiodes, amplifiers in modules on top of PLC

Integrated mirror, etched into PLC

Quad receiver module

Quad VCSEL transmitter module

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GigaWaM: Central Office savings

Pack into modulesHierarchical approach to integration

Testable, functional units

C/LPDPDPDPD

VCSELVCSELVCSELVCSEL

AWG x16x16

x4x4

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Thank you for your attention!

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