A5085222021- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Optical Network Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Error Correcting Code Techniques
- Power Line Communications and Noise
- Advanced Wireless Communication Techniques
- Blind Source Separation Techniques
- Parallel Computing and Optimization Techniques
- Power Quality and Harmonics
- PAPR reduction in OFDM
- Magneto-Optical Properties and Applications
- Radiation Effects in Electronics
- Spacecraft Design and Technology
- Advanced Wireless Network Optimization
- Optical Wireless Communication Technologies
- Smart Grid Security and Resilience
- Numerical methods for differential equations
- Astronomical Observations and Instrumentation
- Neural Networks and Reservoir Computing
- Non-Invasive Vital Sign Monitoring
- Wireless Communication Networks Research
Polytechnic University of Turin
2016-2025
Istituto Nazionale di Ricerca Metrologica
2019
Nokia (United States)
2014-2015
We develop and present a generalization of the GN-model - generalized Gaussian noise (GGN) model to enabling fair application predict generation nonlinear interference when loss parameters relevantly vary with frequency and/or distributed amplification applies selectively portions exploited spectrum stimulated-Raman-scattering-induced crosstalk is relevant.
We present a novel scheme to cancel signal-signal beat interference in direct-detection systems with single-sideband modulation. use this successfully transmit 80-Gb/s SSB-DMT at 1550 nm over 80-km SSMF margin.
We demonstrate an up to 115-Gb/s line-rate short-reach system using a single 1550-nm VCSEL with discrete multi-tone modulation and direct detection, which can cover 500-m 4-km standard-single-mode fiber at 95-Gb/s 105-Gb/s bit rates.
We generate a 72-GBd single-carrier 64-QAM signal using high-speed digital-to-analog converters. obtain record line rate of 864 Gb/s on single wavelength and demonstrate 5-channel WDM transmission over 400 km fiber.
In this paper, we compare the performance of probabilistically shaped 64QAM with uniform 16QAM and 32QAM modulation formats at same net data rate in long-haul coherent optical communications systems. Experimental results 16 GBaud are shown, offline postprocessing performed using either an ideal or a realistic carrier phase estimation (CPE) scheme. We show that choice CPE algorithm receiver is crucial, since, as predicted by current models, most additional nonlinear noise introduced shaping...
We present the first real-time transmission experiment over a 60-km-long fiber supporting six coupled spatial and polarization modes, enabled by custom receiver board an FPGA-implementation of unconstrained adaptive frequency-domain MIMO equalizer.
Network operators are aiming to overcome the envisioned data traffic crunch by relying on already installed fiber cables. Multiband optical line systems (LSs) will thus be solution, starting from extension C+L band transmission. Such a bandwidth also speeds up network disaggregation avoid an increase in costs. Thus, LS controllers need quality-of-transmission estimator (QoT-E) modules capable of quickly estimating merit lightpaths, and so analytical models for transmission layer mandatory....
We demonstrate the first all-electronically time division multiplexed (ETDM) transponder with a line rate exceeding 1 Tb/s (90-GBd PDM-64-QAM), using novel 3-bit multiplexing DAC IC.
We introduce FFSS, an optical fiber simulator entirely developed in MATLAB <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">®</sup> which takes advantage of parallel calculation on graphic processing units (GPU). This software solves the nonlinear Schrödinger equation (NLSE) - single-mode wave relying well-known split-step Fourier method (SSFM). FFSS operates either PMD-Manakov (PMD-ME) that averages out random birefringence and polarization mode...
This paper presents a modified soft-decoding strategy, which improves performance in the presence of strong phase noise. can substantially increase reach systems that are severely affected by noise, generated fiber non-linear Kerr effect. strategy is applied to two different experimental scenarios employing constellation shaping, known generate In first experiment, we show significantly probabilistically shaped (PS) 64 quadratic-amplitude modulation (QAM) over low-dispersion fibers. second...
Several research works are currently addressing 100+ Gbps per wavelength high-capacity dense division multiplexing (DWDM) medium reach systems (80 km on SMF fibers) to cover the metro market segment. For purposes of cost reduction, it is interesting consider use direct detection receivers rather than more expensive coherent receivers. However, DWDM transmission in C-Band imposes severe limitations terms tolerances chromatic dispersion, electrical low-pass filtering, analog-to- digital...
Following the LOGO paradigm, we propose and test frequency-dependent power control strategies show that 50% pre-tilting for L-band flat launch C-band is a good strategy as predicted by GGN-model.
We demonstrate an all-electronically multiplexed, single optical carrier, flexible rate transmitter based on a high-speed 3-bit multiplexer and analog-to-digital converter integrated circuit. Line rates up to 1.08 Tb/s are obtained using 90 Gbd PDM-64QAM.
We demonstrate compensation of fiber nonlinearities using repeated optical phase conjugation (OPC) in a WDM system with eight 32-Gbaud PDM 16-QAM channels, showing improved performance over single mid-span OPC and no OPC.
Multi-subcarrier frequency-domain hybrid modulation formats (MSC-FDHMF) are experimentally compared against single-carrier probabilistic-shaped (SC-PS) 64QAM to achieve 12.5G bit-rate granularity at 32 Gbaud. We found maximum reach gains of SC-PS over MSC-FDHMF in the range 0.4-1 dB.
We demonstrate the real-time applicability of SOP-based anomalous vibrations detection. The proposed demo will engage audience by showing time evolution two metrics, with user-set parameters and different fiber-induced mechanical vibrations.
We present a series of experiments testing the accuracy new closed-form multiband EGN model, carried out over full-Raman 9-span C+L link. Transmission regimes ranged from linear to strongly non-linear with large ISRS. found good correspondence between predicted and measured performance.
We show that the performance penalty for probabilistically-shaped constellations induced by residual non-linear phase noise after standard CPE is significantly higher in low-symbol rate systems, canceling potential gain achievable through symbol optimization.
We present simulative analyses displaying how PMD has negligible interaction with the generation of nonlinear interference, and show that GN-model is accurate yet conservative in estimating generalized SNR also wide-bandwidth transmission.
Probabilistically-shaped QAM constellations are compared to uniformly distributed ones in terms of maximum values achievable mutual information, showing that the potential gain depends on both target transmission rate and reference constellation cardinality.
In multi-subcarrier wavelength-division-multiplexed (WDM) systems, spectrally close subcarriers are influenced by nonlinearity in a similar way. This causes the nonlinear interference noise (NLIN) that affects them to be correlated - fact can exploited for mitigation. Focusing on effect of nonlinearity-induced phase (NLPN), we find auto-correlation and cross-correlation functions NLPN influencing different subcarriers, propose mitigation algorithm takes advantage these correlations so as...
We investigate the accuracy of GN/EGN model fiber non-linear propagation in upcoming scenario Gaussian-shaped transmission systems operating at ultra-high symbol rates. The impact phase-noise these scenarios is addressed as well.
We experimentally compare the performance of uniformly distributed and probabilistically shaped constellations with either same asymptotic mutual information or FEC overhead, in order to assess achievable shaping gain.