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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