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We report on the use of programmable silicon photonic meshes of thermally tuneable interferometers to manipulate dynamically guided-wave and free-space optical beams on a chip through arbitrary linear transformations. Several applications are presented, including automatic reconstruction and unscrambling of mixed optical modes; forming and steering of free-space optical beams; coupling of free-space beams from arbitrary directions of arrival to single-mode waveguides; phase front reconstruction and beaming through scattering media. Automatic self-configuration of the meshes is achieved by exploiting built-in transparent monitors, beam labelling and thermal crosstalk cancellation strategies, enabling scalability to photonic meshes with a large number of interferometers.
Francesco Morichetti,Fabio Toso,Francesco Zanetto,Giorgio Ferrari,Marco Sampietro,Andrea Melloni, andDavid A. B. Miller
"Dynamically controlling optical beams with programmable silicon photonic meshes (Conference Presentation)", Proc. SPIE 11283, Integrated Optics: Devices, Materials, and Technologies XXIV, 1128310 (10 March 2020); https://doi.org/10.1117/12.2550397
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Francesco Morichetti, Fabio Toso, Francesco Zanetto, Giorgio Ferrari, Marco Sampietro, Andrea Melloni, David A. B. Miller, "Dynamically controlling optical beams with programmable silicon photonic meshes (Conference Presentation)," Proc. SPIE 11283, Integrated Optics: Devices, Materials, and Technologies XXIV, 1128310 (10 March 2020); https://doi.org/10.1117/12.2550397