Robust free space optical communication receiver based on a spatial mode demultiplexer and a silicon photonic coherent combining circuit

Vincent Billault; Jérôme Bourderionnet; Luc Leviandier; Patrick Feneyrou; Anaëlle Maho; Michel Sotom; Xavier Normandin; Herve Lonjaret; Arnaud Brignon

doi:10.1117/12.2606217

4 March 2022 Robust free space optical communication receiver based on a spatial mode demultiplexer and a silicon photonic coherent combining circuit

Vincent Billault, Jérôme Bourderionnet, Luc Leviandier, Patrick Feneyrou, Anaëlle Maho, Michel Sotom, Xavier Normandin, Herve Lonjaret, Arnaud Brignon

Author Affiliations +

Proceedings Volume 11993, Free-Space Laser Communications XXXIV; 1199304 (2022) https://doi.org/10.1117/12.2606217
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

Mitigation of atmospheric turbulence is a major challenge in optical wireless communication, especially for optical feeder links. In this paper, we present a free space optical (FSO) mode diversity receiver, based on a spatial demultiplexer and a silicon photonic coherent combiner to reduce the atmospheric turbulence deleterious effects. We simulate the spatial light distribution in the ground receiver aperture for a use case consisting of a FSO link from a GEO satellite. We then generate experimentally wavefronts corresponding to the spatial light distribution for that use case with a wavefront emulator, and we compare the collection efficiency of the proposed mode diversity receiver with a FSO single mode fiber (SMF) receiver. The proposed FSO receiver outputs a signal much more stable as the system is resilient to energy redistribution among higher order spatial modes.

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Vincent Billault, Jérôme Bourderionnet, Luc Leviandier, Patrick Feneyrou, Anaëlle Maho, Michel Sotom, Xavier Normandin, Herve Lonjaret, and Arnaud Brignon "Robust free space optical communication receiver based on a spatial mode demultiplexer and a silicon photonic coherent combining circuit", Proc. SPIE 11993, Free-Space Laser Communications XXXIV, 1199304 (4 March 2022); https://doi.org/10.1117/12.2606217

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