Abstract: Divided function optical component, for optical telecommunications, of the type comprising optical fibers in conjugate object-image positions for regrouping or separating the light rays according to a given function. The component comprises simultaneously several groups of conjugate object-image fibers relative to the same regrouping or separation function. All the fibers are positioned in the same weak aberration area.

Abstract: Optical isolation device intended to be used at one end of an optical transmission fiber (1) to introduce therein a light from a nearby emitter and to extract therefrom and to separate lights originating from emitters placed at the other end of the fiber (1). The device comprises two optical media separated by a filter mirror (8), the emitter-fiber link (2-1) being produced in one of the media (6), the separation and the collection by the receivers (3, 4) being produced in the other of the media (7). The invention applies to telecommunications using optical fibers.