10 10 Gb/s Transmission in 2.2 km Multimode Fiber Using Integrated

DWDM Transceiver and Adaptive Optics

Rahul A. Panicker1, Jeffrey P. Wilde1,

Joseph M. Kahn1,

David F. Welch2, Ilya Lyubomirsky2

1Stanford University, Dept. of Electrical Engineering, Stanford, CA

2Infinera Corporation, Sunnyvale, CA

2

Modal Dispersion Compensation Using Adaptive Modal Dispersion Compensation Using Adaptive Optics: Single ChannelOptics: Single Channel

X. Shen, J. M. Kahn and M. A. Horowitz, Optics Letters, vol. 30, no. 22, pp. 2985-2987, Nov. 15, 2005.

Spatial LightModulator

Multimode Fiber

OOKModulator

AdaptiveAlgorithm

Fourier Lens

Iin(t)

Trans.Data

Transmitter

Low-Rate Feedback Channel

Photo-Detector

Clock & DataRecovery

ISIEstimation

Rec.Data

ISI ObjectiveFunction

Receiver

Iout(t)

0.30.10.40.8

3

Modal Dispersion Compensation Using Adaptive Modal Dispersion Compensation Using Adaptive Optics: Wavelength-Division MultiplexingOptics: Wavelength-Division Multiplexing

Spatial LightModulator

Multimode Fiber

AdaptiveAlgorithm

Fourier Lens

OOKModulator

Trans.Data 1

Transmitter

Low-Rate Feedback Channel

Photo-detector

Clock & DataRecovery

ISIEstimation

Rec.Data 1

ISI ObjectiveFunction

Receiver

f

OOKModulator

Trans.Data M

…

Single-ModeMultiplexer

I1,in(t)

IM,in(t)Single- or Multi-

Mode Demultiplexer

…

I1,out(t)

IM,out(t)

Photo-detector

Clock & DataRecovery

Rec.Data M

Spatial LightModulator

Multimode Fiber

AdaptiveAlgorithm

Fourier Lens

OOKModulator

Trans.Data 1

Transmitter

Low-Rate Feedback Channel

Photo-detector

Clock & DataRecovery

ISIEstimation

ISIEstimation

Rec.Data 1

ISI ObjectiveFunction

Receiver

ff

OOKModulator

Trans.Data M

…

Single-ModeMultiplexer

I1,in(t)

IM,in(t)Single- or Multi-

Mode Demultiplexer

…

I1,out(t)

IM,out(t)

Photo-detector

Clock & DataRecovery

Clock & DataRecovery

Rec.Data M

4

10 10 10 Gb/s Transmission Experiment 10 Gb/s Transmission Experiment

Corning Incorporated: InfiniCor eSX+ fibers

10 10 Gb/s DWDM Transceiver

SMF

10 11.1 Gb/s NRZDWDM Tx Output

SMF

10 11.1 Gb/s NRZDWDM Rx Input

TxElectronic

IC

. . .

TxPhotonic

IC

RxElectronic

IC

RxPhotonic

IC

. . .

C BandDiplexer

Long

Short

Long + Short

PC

A

B5% A +95% B

SMF PMSMF

MMFPC

Free-SpaceAdaptive

Optics

Enclosure

MMF50 m GRINMMF 2.2 km

IncubatorTwo-Stage

C Band EDFA

SMF

C 90% CSMF

10% C

SMF

PersonalComputer

SLMDriver

10 10 Gb/s DWDM Transceiver

SMF

10 11.1 Gb/s NRZDWDM Tx Output

SMF

10 11.1 Gb/s NRZDWDM Rx Input

TxElectronic

IC

TxElectronic

IC

. . .

TxPhotonic

IC

TxPhotonic

IC

RxElectronic

IC

RxElectronic

IC

RxPhotonic

IC

RxPhotonic

IC

. . .

C BandDiplexer

Long

Short

Long + Short

PC

A

B5% A +95% B

SMF PMSMF

MMFPC

Free-SpaceAdaptive

Optics

Enclosure

MMF50 m GRINMMF 2.2 km

IncubatorTwo-Stage

C Band EDFA

SMF

C 90% CSMF

10% C

SMF

PersonalComputerPersonalComputer

SLMDriverSLM

Driver

BER-based adaptation

10 10 Gb/s DWDM Transceiver

SMF

10 11.1 Gb/s NRZDWDM Tx Output

SMF

10 11.1 Gb/s NRZDWDM Rx Input

TxElectronic

IC

. . .

TxPhotonic

IC

RxElectronic

IC

RxPhotonic

IC

. . .

C BandDiplexer

Long

Short

Long + Short

PC

10 Gb/s Pilot Channel Tx

10 Gb/sPattern

Generator

Tunable Laser +MZ Mod. PM SMF

10 Gb/s NRZPilot Channel

A

B5% A +95% B

SMF PMSMF

MMFPC

Free-SpaceAdaptive

Optics

Enclosure

MMF50 m GRINMMF 2.2 km

IncubatorTwo-Stage

C Band EDFA

SMF

C 90% CSMF

10% C

SMF

BandpassFilter

40 GHz

p-i-n +Transimp.Amplifier

PersonalComputer

SLMDriver

SamplingOscilloscope

10 Gb/s NRZPilot

Channel

SMF

10 10 Gb/s DWDM Transceiver

SMF

10 11.1 Gb/s NRZDWDM Tx Output

SMF

10 11.1 Gb/s NRZDWDM Rx Input

TxElectronic

IC

TxElectronic

IC

. . .

TxPhotonic

IC

TxPhotonic

IC

RxElectronic

IC

RxElectronic

IC

RxPhotonic

IC

RxPhotonic

IC

. . .

C BandDiplexer

Long

Short

Long + Short

PC

10 Gb/s Pilot Channel Tx

10 Gb/sPattern

Generator

Tunable Laser +MZ Mod. PM SMF

10 Gb/s NRZPilot Channel

A

B5% A +95% B

SMF PMSMF

MMFPC

Free-SpaceAdaptive

Optics

Enclosure

MMF50 m GRINMMF 2.2 km

IncubatorTwo-Stage

C Band EDFA

SMF

C 90% CSMF

10% C

SMF

BandpassFilter

40 GHz

p-i-n +Transimp.Amplifier

PersonalComputerPersonalComputer

SLMDriverSLM

Driver

SamplingOscilloscope

SamplingOscilloscope

10 Gb/s NRZPilot

Channel

SMF

Pilot channel-based adaptation

5

Adaptive Optics SubsystemAdaptive Optics Subsystem

PM SMFNA = 0.11 f = 10.4 mm

f = 10.4 mm

50 m GRIN MMFNA = 0.19

45-45

Linear Polarizer

NematicLiquid Crystal Spatial Light

Modulator

/2plate

/4plate

Enclosure

SLM DriveSignal

Two-AxisTranslation Stage

PM SMFNA = 0.11 f = 10.4 mm

f = 10.4 mm

50 m GRIN MMFNA = 0.19

45-45

Linear Polarizer

NematicLiquid Crystal Spatial Light

Modulator

/2plate

/4plate

Enclosure

SLM DriveSignal

Two-AxisTranslation Stage

kx

ky

kx

ky

6

Po

we

r in

0.2

nm

BW

(d

Bm

)

Wavelength (nm)

5

10

15

20

25

1545 1549 1553 1557 1561 1565

Po

we

r in

0.2

nm

BW

(d

Bm

)

Wavelength (nm)

5

10

15

20

25

1545 1549 1553 1557 1561 1565

Po

we

r in

0.2

nm

BW

(d

Bm

)

Wavelength (nm)

5

10

15

20

25

1545 1549 1553 1557 1561 15650 1 2 3 4 5 6 7 8 9 10

FE

C D

eco

der

In

pu

t B

ER

Attenuator Setting (dB)

100

10 2

10 4

10 6

10 8

10 10

FECThreshold

0 1 2 3 4 5 6 7 8 9 10

FE

C D

eco

der

In

pu

t B

ER

Attenuator Setting (dB)

100

10 2

10 4

10 6

10 8

10 10

FECThreshold

Hand-Optimized (Center Launch, Best SOP)Hand-Optimized (Center Launch, Best SOP)Blank SLMBlank SLM

6.2 dB

7

10 10 m Offset Launch, Worst SOPm Offset Launch, Worst SOPBefore AdaptationBefore Adaptation

Po

we

r in

0.2

nm

BW

(d

Bm

)

Wavelength (nm)

5

10

15

20

25

1545 1549 1553 1557 1561 1565

Po

we

r in

0.2

nm

BW

(d

Bm

)

Wavelength (nm)

5

10

15

20

25

1545 1549 1553 1557 1561 1565

Po

we

r in

0.2

nm

BW

(d

Bm

)

Wavelength (nm)

5

10

15

20

25

1545 1549 1553 1557 1561 1565

8

10 10 m Offset Launch, Worst SOPm Offset Launch, Worst SOPAfter BER-Based AdaptationAfter BER-Based Adaptation

Po

wer

in 0

.2 n

m B

W (

dB

m)

Wavelength (nm)

5

10

15

20

25

1545 1549 1553 1557 1561 1565

Po

wer

in 0

.2 n

m B

W (

dB

m)

Wavelength (nm)

5

10

15

20

25

1545 1549 1553 1557 1561 1565

Po

wer

in 0

.2 n

m B

W (

dB

m)

Wavelength (nm)

5

10

15

20

25

1545 1549 1553 1557 1561 1565

9

10 10 m Offset Launch, Worst SOPm Offset Launch, Worst SOPBefore AdaptationBefore Adaptation

0 1 2 3 4 5 6 7 8 9 10

FE

C D

eco

der

In

pu

t B

ER

Attenuator Setting (dB)

100

10 2

10 4

10 6

10 8

10 10

FECThreshold

0 1 2 3 4 5 6 7 8 9 10

FE

C D

eco

der

In

pu

t B

ER

Attenuator Setting (dB)

100

10 2

10 4

10 6

10 8

10 10

FECThreshold

10

10 10 m Offset Launch, Worst SOPm Offset Launch, Worst SOPAfter BER-Based AdaptationAfter BER-Based Adaptation

0 1 2 3 4 5 6 7 8 9 10

FE

C D

eco

der

In

pu

t B

ER

Attenuator Setting (dB)

100

10 2

10 4

10 6

10 8

10 10

FECThreshold

0 1 2 3 4 5 6 7 8 9 10

FE

C D

eco

der

In

pu

t B

ER

Attenuator Setting (dB)

100

10 2

10 4

10 6

10 8

10 10

FECThreshold

3.4 dB

11

10 10 m Offset Launch, Worst SOPm Offset Launch, Worst SOPBER-Based AdaptationBER-Based Adaptation