Project description
Optical, opto-electronic, photonic functional components
Synchronous quadrature phase shift keying (QPSK) transmission combined with return-to-zero (RZ) coding and polarization division multiplex is an extremely attractive modulation format for metropolitan area and long haul fiber communication. Compared to standard intensity modulation the line rate is 4 times lower, the needed number of photons per bit less than half as high, the tolerance to chromatic dispersion about 8 times better, the tolerance to polarization mode dispersion about 3 times better, and the tolerance against fiber nonlinearities, in particular cross phase modulation, is excellent. Moreover, all linear optical distortions (polarization transformations, polarization mode dispersion, chromatic dispersion) can be equalized without losses in the electrical domain. Distinct advantages exist also over all other modulation formats, including duobinary, DPSK and DQPSK. So far, synchronous QPSK has not been realized because the necessary components were not available, for example lasers with linewidths in the lower kHz region. For the implementation of synchronous RZ-QPSK transmission with polarization division multiplex this project aims at the realization of all necessary components which can not be found on the market: LiNbO3 QPSK modulators in the transmitter, LiNbO3 optical 90� hybrids, InP balanced photoreceivers - reliably co-packaged with the 90� hybrids - and SiGe/CMOS integrated electronic circuits for signal conditioning in the receiver. Standard distributed-feedback (DFB) lasers are tolerable for signal and local oscillator lasers due to a novel carrier recovery concept that requires no phase-locked loop. It is implemented in the receiver by analog-to-digital conversion and subsequent CMOS signal processing. The symbol rate is 10 Gsymbols/s which amounts to 40 Gbit/s, plus FEC overhead. All components and contributions shall be validated in a synchronous QPSK polarization division multiplex transmission testbed.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: https://op.europa.eu/en/web/eu-vocabularies/euroscivoc.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: https://op.europa.eu/en/web/eu-vocabularies/euroscivoc.
- engineering and technology materials engineering fibers
- engineering and technology electrical engineering, electronic engineering, information engineering electronic engineering signal processing
- natural sciences physical sciences optics laser physics
- natural sciences physical sciences theoretical physics particle physics photons
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
FP6-2003-IST-2
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
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Germany
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