16-Channel modular platform for automatic control and reconfiguration of complex photonic circuits

Guglielmi, Emanuele; Carminati, Marco; Zanetto, Francesco; Annoni, Andrea; Morichetti, Francesco; Melloni, Andrea; Sampietro, Marco; Ferrari, Giorgio

doi:10.1109/iscas.2017.8050453

Cited by 12 publications

(12 citation statements)

References 8 publications

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“…The system is designed in a modular way (Fig. 3) [19]: a first PCB, shaped to best fit in the optical bench, houses the photonic and electronic chips, while a larger motherboard hosts the rest of the electronics. This approach allows to maximize the readout accuracy by mounting the two chips close to each other, while allowing easy optical coupling and good flexibility in the design of the electronics.…”

Section: Multichannel Electronic Platform For Closed-loop Control Of Photonic Circuitsmentioning

confidence: 99%

Low-Noise Mixed-Signal Electronics for Closed-Loop Control of Complex Photonic Circuits

Zanetto

2022

Special Topics in Information Technology

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An increasing research effort is being carried out to profit from the advantages of photonics not only in long-range telecommunications but also at short distances, to implement board-to-board or chip-to-chip interconnections. In this context, Silicon Photonics emerged as a promising technology, allowing to integrate optical devices in a small silicon chip. However, the integration density made possible by Silicon Photonics revealed the difficulty of operating complex optical architectures in an open-loop way, due to their high sensitivity to fabrication parameters and temperature variations. In this chapter, a low-noise mixed-signal electronic platform implementing feedback control of complex optical architectures is presented. The system exploits the ContactLess Integrated Photonic Probe, a non-invasive detector that senses light in silicon waveguides by measuring their electrical conductance. The CLIPP readout resolution has been maximized thanks to the design of a low-noise multichannel ASIC, achieving an accuracy better than −35 dBm in light monitoring. The feedback loop to stabilize the behaviour of photonic circuits is then closed in the digital domain by a custom mixed-signal electronic platform. Experimental demonstrations of optical communications at high data-rate confirm the effectiveness of the proposed approach.

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Section: Multichannel Electronic Platform For Closed-loop Control Of Photonic Circuitsmentioning

confidence: 99%

Low-Noise Mixed-Signal Electronics for Closed-Loop Control of Complex Photonic Circuits

Zanetto

2022

Special Topics in Information Technology

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“…Each interferometer is controlled by means of two heaters and a CLIPP on the lower output branch, as previously reported in Figure 4. The partial derivatives of the MZIs, extracted with the dithering technique, are fed to a set of digital integral controllers [26], operating in parallel to drive the dithering signals to zero. Six independent feedback loops are thus needed to control the full architecture.…”

Section: Dithering‐based Automated Control Architecturementioning

confidence: 99%

Dithering‐based real‐time control of cascaded silicon photonic devices by means of non‐invasive detectors

Zanetto

Grimaldi

Toso

et al. 2021

IET Optoelectronics

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Real‐time control of multiple cascaded devices is a key requirement for the development of complex silicon photonic circuits performing new sophisticated optical functionalities. This article describes how the dithering technique can be leveraged in combination with non‐invasive light probes to independently control the working point of many photonic components. The standard technique is extended by introducing the concept of orthogonal dithering signals to simultaneously discriminate the effect of different actuators, while the idea of frequency re‐use is discussed to limit the complexity of control systems in cascaded architectures. After a careful analysis of the problem, the article presents an automated feedback strategy to tune and lock photonic devices in the maxima/minima of their transfer functions with given response speed and sensitivity. The trade‐offs of this approach are discussed in detail to provide guidelines for the design of the feedback loop. Experimental demonstrations on a mesh of Mach‐Zehnder interferometers and on cascaded ring resonators are discussed to validate the proposed control architecture in different scenarios and applications.

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“…The system is in our case conceived in a modular way (Fig. 9) [32]: a small PCB, shaped to best fit in the optical bench, houses the photonic chip and the frontend ASIC, while a cable-connected motherboard hosts the rest of the electronics. This approach allows to maximize the readout sensitivity by placing the two chips close to each other, while allowing easy optical access and good flexibility in the design of the electronic system.…”

Section: -Multichannel Electronic Platform For Automated Control Of P...mentioning

confidence: 99%

Electronics-photonics co-design for robust control of optical devices in dense integrated photonic circuits

Toso

Zanetto

Grimaldi

et al. 2021

2021 IEEE Custom Integrated Circuits Conference (CICC)

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16-Channel modular platform for automatic control and reconfiguration of complex photonic circuits

Cited by 12 publications

References 8 publications

Low-Noise Mixed-Signal Electronics for Closed-Loop Control of Complex Photonic Circuits

Low-Noise Mixed-Signal Electronics for Closed-Loop Control of Complex Photonic Circuits

Dithering‐based real‐time control of cascaded silicon photonic devices by means of non‐invasive detectors

Electronics-photonics co-design for robust control of optical devices in dense integrated photonic circuits

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