We review the recent advances reported in the field of integrated photonic waveguide meshes, both from the theoretical as well as from the experimental point of view. We show how these devices can be programmed to implement both traditional signal processing structures, such as finite and infinite impulse response filters, delay lines, beamforming networks as well as more advanced linear matrix optics functionalities. Experimental results reported both in Silicon and Silicon Nitride material platforms will be presented. We will also discuss the main programming algorithms to implement these structures and discuss their applications either as standalone systems or as part of more elaborated subsystems in microwave photonics, quantum information and machine learning.
Daniel Perez, Ivana Gasulla, and Jose Capmany, "Reconfigurable integrated waveguide meshes for photonic signal processing and emerging applications," Proc. SPIE 10535, Integrated Optics: Devices, Materials, and Technologies XXII, 105351L (Presented at SPIE OPTO: February 01, 2018; Published: 23 February 2018); https://doi.org/10.1117/12.2292733.
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