Partie 2 - Systematic
Partie 2 - Systematic
Partie 2 - Systematic
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05Telecom:Mise en page 1 3/11/08 11:54 Page 109<br />
SYSTEM@TIC PARIS-REGION LES PROJETS DE R&D AU CŒUR DE LA RÉVOLUTION NUMÉRIQUE<br />
Project COHDEQ 40 intends to demonstrate the potential of coherent detection associated with Digital Signal Processing for next<br />
generation high density 40Gb/s WDM systems optimized for transparency and flexibility. Key integrated optoelectronics components<br />
and specific algorithms will be developed and system evaluation performed.<br />
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Contact<br />
Gabriel CHARLET<br />
ALCATEL-LUCENT FRANCE<br />
+33 1 30 77 27 08<br />
gabriel.charlet@alcatel-lucent.fr<br />
COHDEQ40<br />
COHerent Detection of QPSK 40Gb/s<br />
///// GT Télécoms<br />
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PROJECTS PLANS & DELIVERABLES<br />
The current challenges for the project are:<br />
><br />
Provide hardware elements for realization of QPSK and coherent<br />
detection….<br />
><br />
><br />
Develop algorithm for coherent detection of advanced modulation<br />
format (QPSK, PDM QPSK)<br />
Test system performance of advanced formats associated with coherent<br />
detection in optical transmission test bed and evaluate the<br />
cost benefit at network level<br />
MAJOR PHASES OF THE PROJECT<br />
Pre-development of key opto-electronic elements (modulator, clockeddriver,<br />
coherent mixer, Twin-photodiode with TIA) for QPSK transmission<br />
and detection.<br />
System evaluation of QPSK associated with coherent detection and<br />
comparison with conventional techniques (differential detection).<br />
Propose algorithms including evaluation and optimization (ready for<br />
FPGA implementations)<br />
STATUS<br />
COHDEQ40 started in January 2007. Specifications of transmitter/receiver<br />
have been done. Opto-electronic components are under developments.<br />
Innovative algorithms have been developed for coherent detection and<br />
transmission over several thousand kilometers have been<br />
performed. Impairments introduced by fiber optics propagation such<br />
as chromatic dispersion and polarization mode dispersion (PMD) have<br />
been fully compensated by digital post processing.<br />
A record capacity x distance transmission over optical fiber has been<br />
demonstrated at OFC’08.<br />
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Partners<br />
Coordinator: Alcatel-Lucent France<br />
Partners:<br />
Alcatel Thales III V Lab, Institut Télécom, IRISA, Kylia,<br />
Photline, XLIM<br />
Major Corporation(s)<br />
SME<br />
Duration: 3 years<br />
Global Budget: 3,2 M€<br />
Funding: 1,3 M€- Agence Nationale pour la Recherche<br />
Académic(s)<br />
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