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Laser beam in stable and unstable multilens resonators is treated by means of beam transformation method. Analytical expressions of laser beam parameters in streight and ring multilens resonators are given in relation of resonator parameters.Example of tested unstable multilens telescopic resonatorused for high power solid state lasers and possessed very good mode seletion ability and nearly diffraction limited output beam quality are also given in the paper.
Laser beam in stable and unstable multilens resonators is treated by means of beam transformation method. Analytical expressions of laser beam parameters in streight and ring multilens resonators are given in relation of resonator parameters. Example of testing unstable multilens telescopic resonator used for high power solid state lasers and possessed very good mode seletion ability and nearly diffraction limited output beam quality are also given in the paper.