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WP-JP-E WP-JP-E

Review meetingReview meeting

JPE – ePhoton/ONe Review Meeting2

JPE Technical review

An outline of research fields• General areas of research in JP-E:

• Equalization techniques, FFE,DFE, MLSE• Equalization in WDM systems, for CD, PMD, NL• Optimization of MLSE equalizers• Optimization of FFE/DFE equalizers• Development and study of SQRT equalization • Coherent multi-level systems + equilization• Signal pre-distortion, pre-shaping• MMF equilization

JPE – ePhoton/ONe Review Meeting3

JPE Technical review

Designs

Studies

Equalization

Coding

Performance

Comparisons

FFE/DFE

MLSE

FEC

In access

In metro

In core

MMF

Dispersion/OSNR

Non-Linearities

Longer distances

Higher capacity

+ Modulation formats

Com

bina

tion

s

Pre-Equalization

JPE – ePhoton/ONe Review Meeting4

JPE Technical review

Access

Metro

Core

Impairments in Multi-mode fibreElectronic dispersion compensation

Increase capacity

Techno economic studies

Special modulation formats Higher capacity – more users

Electronics at end nodes

Equalization

Coding (FEC)Tolerance to noise

Longer reach

Techno economic studies

Higher capacity

Electronics at n/w nodes

Electronic mitigation of non-linearities

Coding schemes (FEC)

Combination

Pre-distortion

Enhance signal quality

Reduce the use of regenerators

Achieve tranmission over longer distances

Source pre-equalization

Transmission efficiency

JPE – ePhoton/ONe Review Meeting5

JPE Technical review ctd.

Topics studied, investigated, demonstrated:• Electronics to mitigate impairments in core:

• Channel distortion: Dispersion, SPM, • Timevirying effects: PMD

FFE/DFE: Optimization of taps, transmission efficiency, adaptive schemes

MLSE: Optimization, study on required stages, transmission efficiency

Alternative solution: pre-equalization• Electronics to mitigate impairments in metro/access:

• Cost effective, small bandwidth, high capacity systems• Low cost Tx,Rx, MMF

Coherent multi-level systems + equilization Low cost DML transmission enchancement compensation (FFE/DFE)

MMF transmission equalization with FFE/DFE• Development and study of SQRT equalization

JPE – ePhoton/ONe Review Meeting6

Actual Research per partner

Research fields per partnerpoliTOMLSE receivers – Algorithm, design optimizationCoherent systems + equalization. Optical PLL to increase receiver sensitivity

FTWDM system equalization (CD, PMD)MLSE receiver FEC + equalization (comparative studies)

ENSTPMD equalization studies (1st and 2nd order PMD)Modulation Format (MOTS) to reduce SPM-induced chirp – Signal Pre-shaping

UCLMLSE testing, pre-equalization, pre-distortion techniquesFFE/DFE optimization

JPE – ePhoton/ONe Review Meeting7

Actual ResearchHHICoherent systems (optical 16QAM) + Equalization

ITModulation Formats (OSSB) dispersion tolerant – Signal pre-shapingSQRT design

AITDFE/FFE optimizationDML – equalization

UPCCoherent systems – Homodyne receivers (for ultra-DWDM in PONs)DML – Frequency modulation + pre-/post-equalizationSQRT equalizers

UoAMMF, plastic fibre equalization for Access, Home networks

JPE – ePhoton/ONe Review Meeting8

Common research fieldsCombination of knowledge and research fields among JP-E partners

Coherent systems + equilization: poliTO, UPC, HHI

Equalization in WDM systems: FT, ENST, AIT

Advanced equilization schemes: poliTO, UCL, FT

DML efficiency enhancment : AIT, UPC

Impairment tolerant modulation formats – Signal/Spectrum Pre-shaping: IT, ENST

MMF POF equilization: UoA, PoliTO

JPE – ePhoton/ONe Review Meeting9

JP-E Mobility actions

Mobility actions: • PoliTO, UCL, UPC:

• On the development and testing of MLSE equalization technique

• PoliTO, UPC, IT:• Plans for further investigations and realization of MLSE

• UPC, IT:• On the performance increase of low cost receivers with the

use of SQRT equalizer.

• UoA, PoliTO:• On electronic dispersion compensation for multimode and

plastic optical fibers

JPE – ePhoton/ONe Review Meeting10

Final report – JP-E technical summary

A 10 page report on the developed techniques within JPE has been prepared and intended for publication

• Introduction: – Network benefits with electronic compensation– Electronic equalizers: FFE/DFE, MLSE

• Compensating chromatic and polarization mode dispersion with EDC

– JPE research activities on FFE/DFE– JPE research activities on MLSE

• Electronic pre-distortion methods• Special applications developed and studied within JPE

– SQRT equalization– Enhancing the performance DML transmitters – Equalization in high order formats– Equalization in short reach links for Multi-Mode Fibres

JPE – ePhoton/ONe Review Meeting11

Joint papers

P. Poggiolini (PoliTO), G. Bosco (PoliTO), M. Visintin (PoliTO), S. J. Savory (UCL), Y. Benlachtar (UCL), P. Bayvel (UCL), R. I. Killey (UCL), MLSE-EDC versus optical dispersion compensation in a single-channel SPM-limited 800 km link at 10 Gbit/s, ECOC 2007 - Paper 9.1.3, Berlin, Germany, September 2007.

J. Prat (UPC), P. Poggiolini (PoliTO), RECEIVER FOR OPTICAL COMMUNICATIONS, COMPRISING A NONLINEAR EQUALISER, International Patent Application (PCT), Vol. PCT/ES2006/000074, No. 1, pp. 13, EPO: USA, Japan, China, August 2007.

J. Prat (UPC), M. Omella (UPC), P. Poggiolini (PoliTO), G. Bosco (PoliTO), R. Killey (UCL), A. Teixeira (IT), R. Sousa (IT), Electronic equalization of photodetection by means of an SQRT module (Invited), ICTON 07, Vol. 1, No. 1, pp. we3.c3.6, Rome, July 2007.

P. Poggiolini (PoliTO), G. Bosco (PoliTO), M. Visintin (PoliTO), P. Bayvel (UCL), R. Killey (UCL), S. Savory (UCL), Y. Benlachtar (UCL), J. Prat (UPC), M. Omella (UPC), Recent progress and fundamental limitations of optical MLSE receivers, 9th International Conference on Transparent Optical Networks (ICTON 2007), pp. paper ICTON I, Rome, Italy, July 2007.

J. Prat (UPC), M. Omella (UPC), P. Poggiolini (PoliTO), G. Bosco (PoliTO), R. Killey (UCL), A. Teixeira (IT), R. Sousa (IT), Electronic equalization of photodetection by means of an SQRT module (invited), ICTON 2007, Rome, Italy, July 2007.

S. Savory (UCL), Y. Benlachtar (UCL), R. Killey (UCL), P. Bayvel (UCL), G. Bosco (PoliTO), P. Poggiolini (PoliTO), J. Prat (UPC), M. Omella (UPC), IMDD Transmission over 1,040 km of Standard Single-Mode Fiber at 10Gbit/s using a One-Sample-per-Bit Reduced-Complexity MLSE Receiver, OFC 2007 - Paper OThK2, Anaheim, CA, USA, March 2007.

JPE – ePhoton/ONe Review Meeting12

Achievements and further research

Research Achievement: • Development and testing of MLSE equalization:

• Work has been carried out through several collaborations for over two years

• Resulted in one of the leading research activities worldwide on the topic of equalization

• Demonstrated a world record uncompensated transmission distance (over 1000km). !

• …in ECOC 2006 Post Deadline paper Th4.4.6

• SQRT equalization:• Initial design and demonstration within JPE• Further developments and testing is underway to achieve higher

data rates and examine other transmission techniques• FFE/DFE equalization for low cost access networks:

• Further collaborative work in currently performed on DML and RSOA transmitters for low cost tuneable access networks

JPE – ePhoton/ONe Review Meeting13

Collaborations established

FP7 projects where JPE team participates: • STREP SARDANA:

• Project initiated purely from the JPE partners• JPE Partners that participate: UPC, IT, AIT, FT• Targets the development and study of PON architectures for

access and low cost technologies to extend the reach, the capacity and the number of users of current PONs

• Ranked 3rd in the final FP7 call 1 evaluation!

• NoE BONE:• All JPE partners are participating to WP15 on Transmission

technologies.• Mitigation techniques with the use of electronics is identified as

one of the main key activities• Further work focuses on the benefits offered to network design

aspects from the use of electronic compensation techniques