Experimental optimisation of repetitively pulse CO_2 laser parameters for the efficiency of radiation energy transfer to the far field and interaction with target

摘要

A 10 kW pulse-periodic CO_2 laser with a closed gas-dynamic loop has been experimentally optimised for the active medium pressure and composition, pumping pulse duration and power. We have obtained experimental dependencies for the laser radiation specific energy, generation efficiency, beam angular divergence, laser beam relative and absolute brightness and effective melting depth of steel, Ti and Al specimens on all the optimised parameters.