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Reference : UMR8523-ESBAND-001
Workplace : VILLENEUVE D ASCQ
Date of publication : Monday, April 27, 2020
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 September 2020
Proportion of work : Full time
Remuneration : 2600 à 3800 € gross / month depending on experience
Desired level of education : PhD
Experience required : Indifferent
In the axis "Fiber optical communications", the mission is to develop efficient solutions for data transmission over different classes of specialty optical fiber developed by the Photonics group of the PhLAM laboratory using the FiberTech Lille technology platform. These fibers, few-mode or multi-core, permit to implement the technology of spatial-division multiplexing of information and hence have transmission capacities potentially exceeding that of single-mode fibers that constitute the World's currently deployed fiber-optic networks. In order to exploit them to their full potentail, it is necessary to develop and test specific digital signal processing (DSP) algorithms for decoding at the end of a link. Such algorithms require a good understanding of the channel matrix.
In the second axis "Wireless THz communications" the mission is to develop new solutions in order to realize ultra-fast data transmission up to and above 1 Gbit/s over distances of up to a km in the frequency domain from 300 GHz to 600 GHz. This will be done by associating specialty optical fibers developed by the PhLAM with ultra-fast photodiodes developed by the IEMN. These perform a conversion from optical to THz signal by photomixing of an optical signal with a reference. The implementation of such optical-THz transmission experiments within the SigmaCOM platform also form a part of this second axis.
- Develop a protocol for characterization of the channel matrix of a few-mode fiber;
- Establish empirical models of the channel matrix
- Develop and parametrize high-order equalization algorithms adapted to the multi-modal channel;
- Extend the study to wireless THz communications at carrier frequency between 300 and 600 GHz;
- Implement optical-THz transmission measurements.
- Signal treatment;
- Digital communications;
- Equalization techniques;
The evolution of telecommunications in particular the impending arrival of 5G makes it imperative to maximize the transmission capacity in both optical and wireless communications. The Photonics group of the PhLAM laboratory, based at IRCICA, Parc de la Haute Borne, has at its disposal a suite of equipment for the generation and analysis of coherent optical signals at high modulation frequency - SigmaCOM platform - which will be utilized in both axes of the present project.
Constraints and risks
The workplace (IRCICA) is subject to controlled access.
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