Main technical/scientific results:
- Development of a comprehensive simulation tool based on MATLAB for the simulation of coherent optical communication systems with support to state-of-the-art technologies such as high-order QAM modulation and processing, electronic subcarrier multiplexing, probabilistic shaping and wavelength selective switch (WSS) optical filtering;
- Theoretical development and numerical simulation of the concept of flexible pulse amplitude modulation (FlexPAM) formats for improved data-rate granularity in single-carrier optical transmission systems;
- Experimental demonstration of benefits of symbol-rate optimization (SRO) for electronic subcarrier multiplexing systems, allowing for 10%-20% extended signal reach due to enhanced tolerance against nonlinear propagation impairments;
- Development and experimental validation of a novel advanced modulation technique based on the concepts of subcarrier-multiplexing and frequency hybrid modulation formats (FDHMF) to enhance the data-rate flexibility and nonlinear tolerance in long-haul optical fiber transmission;
- Experimental demonstration of the concept of hybrid quadrature amplitude modulation between optical carriers of a 400G superchannel, enabling to design optimized spectrally efficient solutions for the recently approved ITU-T grid with 12.5 GHz of granularity;
- Theoretical and experimental demonstration of the incoherent accumulation of nonlinear interference (NLI) generated during the propagation of electronic subcarrier multiplexing signals operating at the optimum baud-rate per subcarrier;
- Experimental comparison of performance and data-rate flexibility provided by the FDHMF technique against the recently proposed probabilistic shaping technique. The obtained results have shown that FDHMF can provide fine data-rate granularity without the need for complex digital signal processing at the transmitter and receiver sides;
- Development of a low-complexity digital pre-emphasis technique for subcarrier multiplexing signals based on power-ratio optimization per subcarrier;
- Experimental demonstration of the benefits of combining nonlinear tolerant FDHMF with capacity achieving probabilistic shaping for ultra-high performance long-haul optical transmission.
Main societal results:
- Presentation and demonstration of series of small experiments on basic properties of light given to students of Carmagnola’s high-school, Torino, Italy, December 2015.
- Co-funded OSA’s Student Chapter of Torino, a student organization co-financed by the Optical Society of America aimed at disseminating optics and photonics to the general public, with special incidence to younger audiences (mainly students from primary, middle and high-schools);
(
https://osachapter.polito.it/about/(se abrirá en una nueva ventana))
- Participation in the ICT Day 2016, promoted by Politecnico di Torino, in which the OSA Student Chapter activities were disseminated to other students and researchers, effectively attracting new members to our student society (
https://osachapter.polito.it/2016/06/10/student-chapter-booth-at-ict-days-2016/)(se abrirá en una nueva ventana);
- Participation on the European Researcher’s Night, at Piazza Castello, Torino, September 2016. Demonstration of several photonics-related experiments to the general public, including high school students and teachers, university students and other researchers, young kids and families.
(
http://www.osa.org/en-us/the_optical_society_blog/2016/october_2016/playing_with_light/(se abrirá en una nueva ventana))
- Presentation “Fotonica e le sue applicazioni: esperimenti e hands-on” given to middle and high school students in the region of Carmagnola, Torino, Italy, February 2017.
