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Programmable Integrated Photonics$
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José Capmany and Daniel Pérez

Print publication date: 2020

Print ISBN-13: 9780198844402

Published to Oxford Scholarship Online: May 2020

DOI: 10.1093/oso/9780198844402.001.0001

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Practical Implementation of Programmable Photonic Circuits

Practical Implementation of Programmable Photonic Circuits

(p.178) 6 Practical Implementation of Programmable Photonic Circuits
Programmable Integrated Photonics

José Capmany

Daniel Pérez

Oxford University Press

In covering the fundamentals and ideal implementation of integrated multi-port interferometers and waveguide meshes, we saw that solutions with larger integration density of programmable unit cells enables the synthesis of more complex circuits. However, photonic integrated circuits (PICs) generally suffer from design and fabrication errors and other non-ideal working conditions, which compromises performance and scalability. In addition, PICs require the development of two additional tiers (electronic hardware and software) to allow their programmability, optimisation and (re)configuration. This chapter introduces basic practical considerations of programmable PIC design and reviews experimental demonstrations of both multi-port interferometers and waveguide mesh arrangements. It analyses the main error sources and their impact on circuit performance and investigates the most challenging evolution obstacles for very large-scale programmable PICs. It introduces an analytical method for arbitrary waveguide mesh analysis. Finally, it presents a general architecture for the control subsystem and introduces the software framework and main algorithms.

Keywords:   waveguide meshes, integrated optics, optical waveguides, programmable circuits, photonic chips, photonic devices

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