Abstract

This study considers the possibility of developing a laser diode module with a fiber output, having an output power more than 100 W in the spectral range of 445–450 nm, for processing metals with a low reflectance in this wavelength range, such as gold, silver, and copper. As sources of radiation, 64 blue laser diodes were used in a standard TO-18 case with a diameter of 5.6 mm and an output optical power of 2 W each, combined into a single 8×8 array. The developed optical system for collimation, spatial beam conversion, and radiation focusing on the end face of the optical fiber makes it possible to input optical power of more than 116 W into a fiber with an efficiency of more than 90%.

© 2019 Optical Society of America

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