| 摘要 |
A light coupler (8) for optically out-coupling a light signal (5) from an integrated waveguide (4) into free space comprises a plurality of microstructures (202). The plurality of microstructures (202) are adapted in shape and position to compensate decay of the light signal (5) when propagating in the light coupler (8), and to provide a power distribution (201) of the light signal (5) when propagating in free space such that this power distribution (201) corresponds to a predetermined target power distribution. Each of the microstructures forms an optical scattering center, and the microstructures are positioned on the light coupler in accordance with a non-uniform number density distribution. |
