Patent ID: 8822905

Claim:
An apparatus, comprising: a spatial light modulator having a two-dimensional array of separately controllable optical phase modulators to phase-modulate light incident on the spatial light modulator; an electronic controller configurable to operate the spatial light modulator to transmit a plurality of light beams such that each of the light beams is modulated by a corresponding different spatial phase pattern; and output or input optics to direct light between an end-face of a multi-mode optical fiber and the spatial light modulator; and wherein the electronic controller is configured to operate the spatial light modulator such that each of the light beams preferentially couples to a different one of optical modes of a set thereof in the multi-mode optical fiber; and wherein the output or input optics is configured to filter light transmitted from the spatial light modulator to the end-face by causing spatially filtering of a Fourier image from said transmitted light of a surface of the spatial light modulator.