Types of spectral combinations of beams of industrial lasers are considered. The optical Fabry-Perot filters are demonstrated to be an acceptable alternative to surface and volume diffraction gratings and edge dichroic filters. Known methods for designing Fabry-Perot filters for spectral multiplexing of channels in fiber-optic telecommunications are updated considering peculiarities of industrial lasers such as different emission power, transmission and suppression bandwidths of filters, and maintenance of minimum power loss. The applicability of the proposed approach is demonstrated using filters for combination of beams of ytterbium fiber lasers as an example. (C) 2022 Optica Publishing Group
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