Dr. Douglas Oliveira De Aguiar Profile

Dr. Douglas Oliveira De Aguiar

at Politecnico di Milano

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Author

Publications (3)

Proceedings Article | 23 May 2018 Presentation

Automatic hitless reconfiguration of silicon photonics microring filters (Conference Presentation)

Douglas Aguiar, Maziyar Milanizadeh, Emanuele Guglielmi, Francesco Zanetto, Marco Sampietro, Francesco Morichetti, Andrea Melloni

Proceedings Volume 10686, 1068614 (2018) https://doi.org/10.1117/12.2307470

KEYWORDS: Silicon photonics, Microrings, Photonic integrated circuits, Dense wavelength division multiplexing, Sensors, Data communications, Optical interconnects, Control systems, Calibration, Manufacturing

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Photonic integrated circuits (PICs) have been demonstrated as a promising technology to implement flexible and hitless reconfigurable devices for telecom, datacom and optical interconnect applications. However, the complexity scaling of such devices is raising novel needs related to their control systems, and the automatic calibration, reconfiguration and operation of these complex architectures both during manufacturing and in service is still an open issue. In this contribution, we report our recent achievements on the automatic hitless tuning of a telecommunication-graded filter operating in the L band, fabricated on a commercial foundry Silicon Photonics (SiP) run. A novel channel labeling strategy is used to automatically identify the desired channel within a Dense Wavelength Division Multiplexing (DWDM) through a FPGA-embedded closed-loop control algorithm. The photonic architecture consists of a hitless third order Micro Ring Resonator (MRR) filter with 8 nm Free Spectral Range (FSR), integrating transparent detectors (ContactLess Integrated Photonic Probes - CLIPP) as power monitors and thermooptic actuators. Transparent detectors enable to control the input/output port of the filter without introducing any loss to the WDM channel comb. Hitless operation is achieved through a pair of switchable Mach-Zehnder interferometers used as input/output couplers of the MRR filter. The fabricated device has a 3 dB bandwidth of 40.7 GHz and provides a through-port in-band isolation of 23 dB and a drop port isolation of 25 dB at 50 GHz spacing from the dropped channel. Hitless reconfiguration is achieved with more than 30 dB isolation during channel selection. The automatic tuning and locking technique is based on the use of a pilot tone generated locally at the node site and applied as a low frequency (few kHz), small modulation index (< 8%), amplitude modulation on the channel to be added to the network. The effectiveness and robustness of the automatic controller for tuning and stabilization of the filter is demonstrated by showing that no significant bit-error rate (BER) degradation is observed in an adjacent channel while the filter is being reconfigured. In addition, the convergence of the algorithm is shown to require only few tens of iterations, each one requiring a few milliseconds. The FPGA-embedded control technique together with the compactness provided by SiP meets the integration requirements for high capacity networks and pluggable modules. In addition, the filter unit can be cascaded with other units to realize a multichannel reconfigurable add-drop architecture operating on several wavelengths at the same time with complete independency.

Proceedings Article | 30 May 2017 Paper

Noninvasive monitoring and control in silicon photonics

Andrea Annoni, Douglas Oliveira De Aguiar, Andrea Melloni, Emanuele Guglielmi, Marco Carminati, Giorgio Ferrari, Annika Buchheit, Hans-Dieter Wiemhöfer, Marina Muñoz-Castro, Charalambos Klitis, Marc Sorel, Francesco Morichetti

Proceedings Volume 10249, 102490F (2017) https://doi.org/10.1117/12.2268880

KEYWORDS: Silicon photonics, Control systems, Sensors, Microrings, Resonators, Optical actuators, Integrated optics, Photonic integrated circuits, Photonic devices, Waveguides, Silicon, Actuators, Feedback control, Switching, Detector development, Integrated photonics

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Proceedings Article | 17 May 2017 Paper

Automated tuning, control and stabilization of photonic integrated circuits

Douglas O. De Aguiar, Andrea Annoni, Nicola Peserico, Emanuele Guglielmi, Marco Carminati, Giorgio Ferrari, Francesco Morichetti

Proceedings Volume 10242, 1024208 (2017) https://doi.org/10.1117/12.2268870

KEYWORDS: Silicon photonics, Photonic integrated circuits, Waveguides, Silicon, Feedback control, Microrings, Resonators, Optical components, Sensors, Light wave propagation, Calibration, Optimization (mathematics), Detection and tracking algorithms, Channel projecting optics

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