A5060949902- Photonic and Optical Devices
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Neural Networks and Reservoir Computing
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Photonic Crystals and Applications
- Advanced Optical Sensing Technologies
- Microwave Engineering and Waveguides
- Semiconductor Quantum Structures and Devices
- Water-Energy-Food Nexus Studies
- Cavitation Phenomena in Pumps
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Antenna and Metasurface Technologies
- Mechanical and Optical Resonators
Politecnico di Milano
2019-2023
Consorzio di Bioingegneria e Informatica Medica
2021
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2020
Weatherford College
2020
Abstract Flexible optical networks require reconfigurable devices with operation on a wavelength range of several tens nanometers, hitless tuneability (i.e. transparency to other channels during reconfiguration), and polarization independence. All these requirements have not been achieved yet in single photonic integrated device this is the reason why potential photonics still largely unexploited nodes communication networks. Here we report fully-reconfigurable add-drop silicon filter, which...
This article presents the key ingredients and best practices for implementing simple, effective robust control calibration procedures arbitrary photonic integrated circuit (PIC) architectures. Three main features are presented discussed: a technique to cancel out effects of mutual crosstalk among thermal tuners, exploitation labelling identify different optical signals, use input modulated signal automatically reshape frequency response device. Examples application then illustrated show...
Abstract Programmable photonic circuits require an electronic control layer to configure and stabilize the optical functionality at run‐time. Such action is normally implemented by supervising status of circuit with integrated light monitors providing feedback signals actuators. This paper demonstrates that can be effectively performed electrical are time‐multiplexed directly on chip. To this aim, necessary functionalities monolithically in a conventional 220 nm silicon photonics platform no...
On-chip optical power monitors are essential elements to calibrate, stabilize, and reconfigure photonic integrated circuits. Many applications require in-line waveguide detectors, where a trade-off has be found between large sensitivity high transparency the guided light. In this work, we demonstrate transparent photoconductor on standard low-doped silicon-on-insulator waveguides that reaches photoconductive gain of more than 106 an as -60 dBm. This performance is achieved by compensating...
Continuously variable true-time optical delay lines are typically subject to a constraint of the bandwidth-delay product, limiting their use in several applications. In this Letter, we propose an integrated topology that breaks product limit. The device is based on multiple Mach-Zehnder Interferometers (MZIs) arranged parallel, providing easier control and larger bandwidth compared ring resonator-based solutions. functionality architecture demonstrated with 4-stage line by performing...
Many optoelectronic devices embedded in a silicon photonic chip, like photodetectors, modulators, and attenuators, rely on waveguide doping for their operation. However, the level of is not always reflecting an equal amount free carriers available conduction because charges trap energy states inevitably present at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">S</mml:mi>...
This paper demonstrates the possibility of automatically stabilizing working condition an integrated Silicon Photonics microring modulator with a novel dithering-based control scheme. The proposed feedback strategy leverages real-time acquisition non-linear transfer function (TF) and operates by setting target locking point to zero TF second derivative, i.e. where ring slope is maximum. results in algorithm that both power-independent calibration-free. shows operating identified this way has...
An FSR free coupled-resonator filter over the extended C+L band (1520 nm–1620 nm) is experimentally demonstrated. Two novel strategies are introduced: non-integer-ratio Vernier design combined with controllable-loss hitless tuning scheme.
Abstract Flexible optical networks require reconfigurable devices with operation on a wavelength range of several tens nanometers, hitless tuneability (i.e. transparency to other channels during reconfiguration), and polarization independence. All these requirements have not been achieved yet in single photonic integrated device this is the reason why potential photonics still largely unexploited nodes communication networks. Here we report fully-reconfigurable add-drop silicon filter, which...
Nonlinear effects limit the maximum amount of optical power that can be handled by silicon photonic integrated circuits (PICs). This limitation is particularly tight in resonant devices such as microring resonator (MRR) filters, suffering from a power-dependent resonance spread due to intracavity enhancement. In this Letter, we present an automatic control system dynamically mitigate nonlinear spectral distortion MRR filters thermally controlling each MRR. The benefit proposed scheme...
Volume testing is rapidly becoming a key step in the production chain of photonic integrated circuits (PICs), which are ever increasing their integration density and complexity, penetrating many market sectors. What makes PIC peculiar with respect to electronic (EICs) fact that it generally requires also control calibration procedures. Here, we present method perform time cost-efficient volume frequency-selective PICs. The described techniques enable evaluate deviation between spectral...
We present a novel design for reconfigurable silicon microring resonator filter exploiting non-integer Vernier ratio to achieve FSR-free spectral response. Hitless tunability across the extended C+L band (1520 nm-1620 nm) is achieved by introducing controllable loss in MRRs of filter.
Monolithic cointegration of electronics and photonics in the same silicon die is expected to enable a new realm high-performance electro-optical systems for telecommunications, automotive, datacenter sensing applications. As an alternative integrating photonic devices into well-established microelectronic technologies, this paper we report on integration CMOS electronic circuits commercial Silicon Photonics technology. Transistors with threshold voltage 1.84V, gain factor 4 μA/V<sup>2</sup>...
Automatic tuning and locking of silicon microring resonator filters with hitless functionality in multichannel WDM system is presented.The filter spectral shape optimized to match the signal shape.A technique cancel thermal crosstalk effects exploited automatically create lookup table.
Automatic tuning and locking of silicon microring resonator filters with hitless functionality in multichannel WDM system is presented. The filter spectral shape optimized to match the signal shape. A technique cancel thermal crosstalk effects exploited automatically create lookup table.