A5046466290- Optical Network Technologies
- Advanced Photonic Communication Systems
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Optical Network Technologies
- Advanced Fiber Optic Sensors
- Multilevel Inverters and Converters
- Optical and Acousto-Optic Technologies
- Magneto-Optical Properties and Applications
- Analog and Mixed-Signal Circuit Design
- Geophysics and Sensor Technology
- Silicon Carbide Semiconductor Technologies
- HVDC Systems and Fault Protection
- Solid State Laser Technologies
- Laser-Matter Interactions and Applications
- Photorefractive and Nonlinear Optics
- Laser Design and Applications
Politecnico di Milano
2023-2025
Xi'an Polytechnic University
2025
Institute of Plasma Physics
2024
Huawei Technologies (France)
2023-2024
In this paper, a Wiener filtering algorithm in the wavelet domain is proposed to filter laser self-mixing interference (SMI) signals, which used improve accuracy of displacement reconstruction. The theoretically constructed and applied both high-frequency coefficients low-frequency domain, are obtained by two-level discrete transformation (DWT) decomposition from unfiltered SMI signals. Two-level threshold determined without any manual judgment. Subsequently, inverse DWT employed generate...
Recent advances in multi-band amplification support ultra-wideband (UWB) systems as a suitable solution to cope with the increasing fiber communications traffic demand. The combination of UWB spectral-efficient modulation formats can significantly increase total throughput wavelength division multiplexed (WDM) transmission systems. <p xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">In this work, we demonstrate 240×70 Gbaud PCS-256QAM WDM using an...
It is shown experimentally and in simulations that nonlinear noise of cascaded semiconductor optical amplifiers accumulates coherently. Noise correlations degrade SNR by up to 3 dB. They are found negligible after few kilometers fiber reduced 2 dB through polarization mixing.
Ultrawide-bandwidth (UWB) optical amplification covering C+L bands over 102 nm is implemented by using a seamless semiconductor amplifier (SOA) as high-power booster with maximum output power of 24.4 dBm well hybrid scheme pre-amplification, which combines backward distributed Raman pumping SOA. In order to provide understanding the transmission performance SOA, we perform thorough SOA characterization. By applying different total input powers, have measured spectrum shape and power....
More than two decades after the first terabit transmission using C+L band, recent advancements in ultra-wideband (UWB) technology have demonstrated remarkably high-throughput achievements S+C+L demonstrations. The development of fast and reliable closed-form propagation models accounting for wavelength-dependent impairments has paved way effective equalization techniques that contribute to this capacity boost. In work, we compare systems C systems, highlighting importance model-based power...
Using accurate ISRS GN modeling and the fast-converging ASE-NL optimization algorithm, we demonstrate 6.2 Tbit/s throughput improvement in a 2-span ultra-wide-band system thanks to use of predicted total per channel power.
A preemphasis-aware model for SOAs with non-flat WDM inputs yielding a root-mean-square error of less than 0.05 dB is presented. It outperforms generic neural-network models while using fraction the training data.
Laser-induced damage thresholds (LIDTs) of input/exit surfaces and filamentation fused silica under low-temporal coherence light (LTCL) a corresponding mechanism are investigated. By comparing self-focusing effects for each incident laser, the lower LIDT LTCL irradiation is mainly attributed to stronger than traditional single longitudinal mode (SLM) pulse lasers. Meanwhile, differences in LIDTs by SLM laser backward stimulated Brillouin scattering. Finally, influences thickness polarization...
Abstract All-fiber optical current sensor (AFOCS) is a perfect product formed by the combination of fiber-optic sensing technology and Faraday effect. It boasts significant advantages such as resistance to electromagnetic interference, high measurement dynamic range precision, low power consumption, cost, insulation. Additionally, it enables long-distance transmission, making one main devices for monitoring in smart grids. However, birefringence within fiber highly susceptible changes...
We report a two-stage two-pass compact amplifier based on SrF<sub>2</sub> crystal with gains of over 10<sup>6</sup>. The shape the is irregular, so that gain length increased and parasitic oscillation suppressed. amplified spontaneous emission (ASE) spectral characteristic are analyzed. results show ASE increases pump power, simultaneous use different crystals types can increase output bandwidth. This work has potential application in high-power / high-energy laser devices.
We experimentally assess the impact of different band drops on performance <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{S}+\mathbf{C}+\mathbf{L}$</tex> multi-band optical transmission systems. also present digital twin our experiment that quantifies noise contributions affecting system in detail. Our results highlight how L is largely affected due to lack ISRS-induced power transfer when S missing.
A preemphasis-aware model for SOAs with non-flat WDM inputs yielding a root-mean-square error of less than 0.05 dB is presented. It outperforms generic neural-network models while using fraction the training data.