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Article

Automatic Initialization Methods for Photonic Components on a Silicon-Based Optical Switch

Nanoscience Laboratory, Department of Physics, University of Trento, 38123 Trento, Italy
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Appl. Sci. 2019, 9(9), 1843; https://doi.org/10.3390/app9091843
Received: 17 March 2019 / Revised: 25 April 2019 / Accepted: 26 April 2019 / Published: 5 May 2019
(This article belongs to the Special Issue PICs for Optical Interconnects)
In this work we showed the optimization of the spectral response of several optical elements in a silicon-based optical switch. Integrated thermal resistors induced a local heating of the components. The temperature increase, in turn, caused a thermal shift of the optical response of the component. In this manner, we aligned interleavers and micro-ring resonators to the International Telecommunication Union (ITU) channels, by using a stochastic method named Globalized Bounded Nelder-Mead (GBNM) to determine the proper temperatures. The optimization engine relied on the optical feedback from on-chip monitor photodiodes to drive these photonic elements into the wanted functioning condition. This method is suited for restoring the spectral response of optical elements impaired by fabrication inaccuracies. In the same way, it can be applied to tune in resonance active components, whose transfer function has one or more local optima. We proved the reliability of the GBNM method for the optimization of an integrated optical switch, with more than thousand optical components, each one interfaced with a thermal resistor driven by a dedicated electronic circuit. On the one hand, the GBNM guaranteed the automatic alignment of all active components on the chip, over multiple instances. On the other hand, the method allowed for the proper working of such a complex device. View Full-Text
Keywords: silicon PICs; 3D integration; optimization methods silicon PICs; 3D integration; optimization methods
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MDPI and ACS Style

Tondini, S.; Castellan, C.; Medina, M.A.; Pavesi, L. Automatic Initialization Methods for Photonic Components on a Silicon-Based Optical Switch. Appl. Sci. 2019, 9, 1843. https://doi.org/10.3390/app9091843

AMA Style

Tondini S, Castellan C, Medina MA, Pavesi L. Automatic Initialization Methods for Photonic Components on a Silicon-Based Optical Switch. Applied Sciences. 2019; 9(9):1843. https://doi.org/10.3390/app9091843

Chicago/Turabian Style

Tondini, Stefano, Claudio Castellan, Manuel A. Medina, and Lorenzo Pavesi. 2019. "Automatic Initialization Methods for Photonic Components on a Silicon-Based Optical Switch" Applied Sciences 9, no. 9: 1843. https://doi.org/10.3390/app9091843

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