The schematic for shaping laser radiation to a significant degree is determined by the purpose of the RL. Practice frequently requires that light beams be integrated from individual cells of the RL to a united light field. All methods of radiation adding can be divided into two major groups: incoherent and coherent. The first are primarily used where the quality parameters of the laser beam do not play a leading role, but the following are required: reservation of radiation sources; obtaining more output power at a given wavelength, which technically cannot be obtained on a single laser; forming a spatially limited optical field (beam) with different wavelengths, etc. Coherent addition of beam radiation in multi-channel laser facility repeatedly increases the intensity and brightness of the laser radiation and reduces its divergence. This is important for transportation of the radiation over a large distance. Coherent addition of N light beams, each of which has a beam divergence close to the diffraction limit, increases beam intensity in the far-field by N2 times. Coherent, serial addition of light beams, as a rule, requires quick-acting adaptive optics that correct the phase of radiation in all laser channels. Implemen­tation of this operation mode for RL is a complicated task.