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Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps...

Date post: 09-Jun-2015
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A single-fiber full-duplex hybrid TDM/WDM-PON is demonstrated to operate at 2.5/1.25 Gbps rates, with RSOA ONU. It achieves high power budget (GPON compliant) at a distances higher than 20km, and serves up to 1280 users.
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Deployment Analysis of TDM/WDM Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Multiplexed Downstream and 1.25 Gbps Upstream Upstream J. M. Fàbrega , V. Polo, J. A. Lázaro, E.T. López, and J. Prat Universitat Politècnica de Catalunya (UPC) Jordi Girona D5; 08034 Barcelona, Spain A. El Mardini, and R. Soila Tellabs Inc. 18581, North Dallas Parkway, Dallas, TX 75287 USA [email protected]
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Page 1: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Deployment Analysis of TDM/WDM Single Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating Fiber PON with Colourless ONU operating

at 2.5 Gbps Sub-Carrier Multiplexed at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps UpstreamDownstream and 1.25 Gbps Upstream

J. M. Fàbrega, V. Polo, J. A. Lázaro, E.T. López, and J. PratUniversitat Politècnica de Catalunya (UPC)Jordi Girona D5; 08034 Barcelona, Spain

A. El Mardini, and R. SoilaTellabs Inc.

18581, North Dallas Parkway, Dallas, TX 75287 USA

[email protected]

Page 2: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Outline

Introduction SCM-DPSK modulation Scenarios description

Large coverage with low number of users

Medium coverage Large density of users

Experiments Conclusions

Page 3: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Introduction

Next generation FTTH: Migration from TDM-PON to hybrid WDM/TDM-PON Key features for cost-effective implementation:

∙ Single fiber, bidirectional transmission External Fibre-Plant reduced Connection management of the outside plant simplified

∙ Colourless Reflective ONU No laser source at ONU No stabilization neither inventory problems

Page 4: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Introduction

∙ IM-IM systems High interference between upstream and downstream Extinction Ratio management

∙ SCM(DPSK)-IM Upstream and downstream signal use different electrical

spectra channels Electrical orthogonality between upstream and

downstream Reduced interference between upstream and

downstream Simple compatibility with GPON electronics.

Page 5: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

SCM/DPSK – IM modulation

MUX

OLTONU

TX SCMPSK

RX IM

RX DPSK

rTX

1.25 GHz

1.25Gb

UP

2.5 GHz

2.5Gb

1.25 GHz

1.25Gb

UP

5 GHz

2.5Gb

DOWN

fe

t

t

1.25 GHz 5 GHz

1.25Gb 2.5GbUP

fe

Down: SCM-DPSK

Up: IM

2.5 GHz

2.5Gb

Page 6: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Experimental setup

2.5 Gbps SCM-DPSK downstream 1.25 Gbps IM upstream OLT optically preamplified 3 scenarios

∙ Low density of users

∙ Medium density of users

∙ Large density of users

El. Osc.

MZM

TxLASER

DATADown

APD

DATAUp

LPF

APD

6 dB splitter

DATADown

RSOA

DATAUp

BER1

PPG1

PPG2

LPF

BER2

OLT

ONU

BPF

PONPON

70:30Coupler

-60

-55

-50

-45

-40

-35

-30

0 1000 2000 3000 4000 5000 6000 7000

Frequency (MHz)

Po

wer

(d

Bm

)

(a)

-65

-60

-55

-50

-45

-40

-35

0 1000 2000 3000 4000 5000 6000 7000

Frequency (MHz)

Po

wer

(d

Bm

)

(b)

-80

-70

-60

-50

-40

-30

-20

-10

0 1000 2000 3000 4000 5000 6000 7000

Power (dBm)

Fre

qu

ency

(M

Hz)

(d)

-80

-70

-60

-50

-40

-30

-20

-10

0 1000 2000 3000 4000 5000 6000 7000

Frequency (MHz)

Po

wer

(d

Bm

)

(c)

Page 7: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

SCM-DPSK modulation

Mx: Double balanced mixer LO: VCO@ 5 GHz BPF: bandpass filter,

∙ centered at 5 GHz ∙ about 4-5 GHz BW. ∙ Important: > 20 dB att @ 1.25 GHz

LPF: Lowpass filter,∙ For “matched” filtering (~2GHz

BW)

Tb: Delay of 1 bit

Data

TX

LO

Mx

Tb

Mx

to MZM

Data

RXBPF

LPF

all electrical components commercially available

-100

-90

-80

-70

-60

-50

-40

-30

0 2 4 6 8 10

Frequency (MHz)

Mag

nit

ud

e (d

B(a

.u.)

)

2.9 GHz

-20 dB

1.9 GHz

-3dB

Page 8: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Scenario 1: Low density of users

27.2 km coverage, giving service to 8 users 25 km feeder 1:8 splitter 2.2 km drop

Total network losses measured to be 16 dB ONU input power of -16 dBm ONU output power of +1 dBm 0 dBm injected from the OLT Measured Rayleigh Backscattering (RB) of -33.5 dBm (17.5 dB

OSRR).

25 km2.2 km

ONUOLT

1:8Powersplitter

Page 9: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Scenario 2: Medium density of users

20.6 km coverage, giving service to 160 users 16 km feeder spool 1:40 AWG demultiplexer 2.4 km distribution spool 1:4 power splitter 2.2 km drop spool

Total network losses measured to be 16.4 dB. ONU: input power of -16.4 dBm, output power of +0.8 dBm 0 dBm injected from the OLT to the feeder fiber Generated RB of -33.5 dBm (17.5 dB of upstream oSRR)

16 km

OLT

1:4Powersplitter

1x40AWG

2.4 km

ONU

2.2 km

Page 10: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Scenario 3: Large density of users 20.2 km coverage, giving service to 1280 users

Double fiber feeder is proposed against Rayleigh Backscattering 2 x 16 km feeder spools 1x40 AWG demultiplexer 2.4 km distribution spool 1:32 power splitter 2.2 km drop spool

Total network losses measured to be 26.6 dB ONU: input power of -16.6 dBm, output power of +0.8 dBm OLT output power of +10 dBm.

16 km

16 km

2.4 km

2.2 km

1x40AWG

1:32Powersplitter

ONU

MZM

PPG1

OLT

TxLASER

To photodetection

Page 11: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Experimental results

-12

-10

-8

-6

-4

-35 -30 -25 -20 -15

Input Power at ONU (dBm)

log(

BE

R)

Scenario 1

Scenario 2

Scenario 3

-12

-10

-8

-6

-4

-35 -30 -25 -20 -15

Input Power at OLT (dBm)

log(

BE

R)

Scenario 3Scenario 2

Scenario 1

Downstream sensitivityUpstream sensitivity

Downstream sensitivity

Upstream sensitivity

Downstream power budget

Upstream power budget

Downstream system margin

Upstream system margin

Scenario 1 -20.1 dBm -18.4 dBm 20.1 dB 19.4 dB 4.1 dB 3.4 dB

Scenario 2 -20.6 dBm -19 dBm 20.6 dB 19.8 dB 4.2 dB 3.4 dB

Scenario 3 -19.6 dBm -28.8 dBm 29.6 dB 29.6 dB 4 dB 4 dB

Page 12: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Conclusions

Demonstration of the bi-directional transmission of 2.5 Gbps/1.25 Gbps in a WDM-PON Downstream signal DPSK coded, operating at 5 GHz

subcarrier

Three deployment scenarios analyzed: 1. Large coverage are and low density of users2. Area with medium density of users3. Improved access network: large density of users

Scenarios 1, 2 show a network power budget of 20 dB Limited by Rayleigh Backscattering Covering up to 160 users

Scenario 3 exhibits a power budget of 29 dB Rayleigh Backscattering negligible Covering up to 1280 users

All cases with power margin > 3 dB

Page 13: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

Thanks!!Thanks!!Josep M. Fàbrega

[email protected]

Page 14: Deployment Analysis of TDM/WDM Single Fiber PON with Colourless ONU operating at 2.5 Gbps Sub-Carrier Multiplexed Downstream and 1.25 Gbps Upstream

RSOA

Uncooled TO-CAN package Characteristics:

Bandwidth 1 GHz ER > 6 dB Small signal gain: ~18 dB Noise figure 8.5 dB

Bias Current (mA) 60 70 80

Gain (dB) @ 1530nm 16.7 18.4 19.6

Gain (dB) @ 1545nm 17.6 18.7 19.6

Gain (dB) @ 1560nm 14.9 15.8 16.7


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