Device for optical communication between electronic modules

Device for optical communication between electronic modules comprising an optically conducting rod (1), having first and second ends, designed to be optically coupled, by lateral coupling, to lateral electronic modules (3) arranged laterally along the rod, and comprising lateral reflecting means (9) arranged over a longitudinal part of the external surface of the rod (1) opposite the lateral modules (3), device characterized in that the lateral modules (3) are slave modules designed to communicate with a master module (2) optically coupled, axially, to the first end of the rod, the rod (1) comprising a useful part equipped with the lateral reflecting means (9) forming a substantially continuous reflecting zone, the rod, which has a cross-section the surface whereof is greater than 15 mm2, and the lateral reflecting means defining a continuous longitudinal lateral coupling zone (8) along the useful part of the rod so as to enable bi-directional optical coupling of the master module (2) with a lateral module (3) arranged at any location along the useful part of the rod, the lateral coupling zone (8) extending over at least one centimeter outside the rod.