An optical amplification device for a Spatial Division Multiplexing optical fiber, comprising: - an input section connectable to a first optical fiber for receiving a plurality of spatially multiplexed optical signals from the first optical fiber, - a coarse amplification section connected to the input section, the coarse amplification section comprising an Erbium doped optical waveguide arranged for amplifying all optical signals of the plurality of spatially multiplexed optical signals received in the input section, characterized in that it comprises - a spatial demultiplexing section connected to an output of the coarse amplification section for receiving the plurality of spatially multiplexed optical signals amplified, said spatial demultiplexing section being arranged for separating the plurality of spatially multiplexed optical signals as a function of a spatial property of each optical signal, - a spatial multiplexing section having a plurality of inputs and an output, the output of the spatial multiplexing section being connectable to a second optical fiber for transmitting a plurality of spatially multiplexed optical signals in the second optical fiber, said spatial multiplexing section being adapted for spatially multiplexing into the second optical fiber a plurality of optical signals received at the inputs of the spatial multiplexing section, - a plurality of optical fine adjustment paths each arranged between an output of the spatial demultiplexing section and an input of the spatial multiplexing section and adapted to send a respective optical signal from the output of the spatial demultiplexing section to the input of the spatial multiplexing section, wherein each optical fine adjustment path comprises an independent optical power adjustment component adapted to adjust power of the optical signal carried on the corresponding optical fine adjustment path. - an input section connectable to a first optical fiber for receiving a plurality of spatially multiplexed optical signals from the first optical fiber, - a coarse amplification section connected to the input section, the coarse amplification section comprising an Erbium doped optical waveguide arranged for amplifying all optical signals of the plurality of spatially multiplexed optical signals received in the input section, - a spatial demultiplexing section connected to an output of the coarse amplification section for receiving the plurality of spatially multiplexed optical signals amplified, said spatial demultiplexing section being arranged for separating the plurality of spatially multiplexed optical signals as a function of a spatial property of each optical signal, - a spatial multiplexing section having a plurality of inputs and an output, the output of the spatial multiplexing section being connectable to a second optical fiber for transmitting a plurality of spatially multiplexed optical signals in the second optical fiber, said spatial multiplexing section being adapted for spatially multiplexing into the second optical fiber a plurality of optical signals received at the inputs of the spatial multiplexing section, - a plurality of optical fine adjustment paths each arranged between an output of the spatial demultiplexing section and an input of the spatial multiplexing section and adapted to send a respective optical signal from the output of the spatial demultiplexing section to the input of the spatial multiplexing section, wherein each optical fine adjustment path comprises an independent optical power adjustment component adapted to adjust power of the optical signal carried on the corresponding optical fine adjustment path.