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Major phases of the project:

Technology providers. Industry. Laboratories. COHDEQ40 COHerent Detection of QPSK 40Gb/s. Télécoms Working Group. Objectives

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Major phases of the project:

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  1. Technologyproviders Industry Laboratories COHDEQ40 COHerent Detection of QPSK 40Gb/s Télécoms Working Group Objectives Project COHDEQ 40 intends to demonstrate the potential of coherent detection associated with Digital Signal Processing for next generation high density 40Gb/s WDM systems optimized for transparency and flexibility. Key integrated optoelectronics components and specific algorithms will be developed and system evaluation performed • Projects plans & deliverables: • The current challenges for the project are : • provide hardware elements for realization of QPSK and coherent detection…. • develop algorithm for coherent detection of advanced modulation format (QPSK, PDM QPSK) • Test system performance of advanced formats associated with coherent detection in optical transmission test bed and evaluate the cost benefit at network level. Major phases of the project: Pre-development of key opto-electronic elements (modulator, clocked-driver, coherent mixer, Twin-photodiode with TIA) for QPSK transmission and detection. System evaluation of QPSK associated with coherent detection and comparison with conventional techniques (differential detection). Propose algorithms including evaluation and optimization (ready for FPGA implementations) Illustrations: TX RX COHDEQ components Status / achievements: COHDEQ40 started in January 2007. First generation of opto-electronic components have been realized and tested. Innovative algorithms have been developed for coherent detection and transmission over several thousand kilometers have been performed. Impairments introduced by fiber optics propagation such as chromatic dispersion and polarization mode dispersion (PMD) have been fully compensated by digital post processing. The association of multilevel modulation format, coherent detection and digital signal processing, as proposed by COHDEQ, is now seen as the way to go to to transport efficiently 100Gb/s signal in optical communication systems in the next 3 years. Business model • Coordinator:Alcatel-Lucent France • Partners:Alcatel Thales III V Lab • Institut Télécom, IRISA, Kylia, Photline, XLIM • Durations:3 years • Global budget: ~ 3.2 M€ • Funding: ~ 1.3 M€ • (ANR, System@tic and Elopsys) • Contact: • Gabriel Charlet • Alcatel-Lucent France • +33 1 30 77 27 08 • gabriel.charlet@alcatel-lucent.fr

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