Todays beam combining is among the most popular techniques for attaining high powers with simultaneously good beam quality. Due to the inherent limitations with the laser gain medium and also with the optical elements in the laser resonator, it is not feasible to achieve a desirable high powers and qualities with a single laser, and there is a power limit, that it is not possible to go beyond, and major difficulties, like thermal effects, starts to degrade the power and quality. Beam combining is a solution to this problem. In this study, we have simulated the method of spectral beam combining. Findings of our simulation indicate the power and brightness scaling of the combined beam with the number of component beams. The brightness of the combined beam is about twice that of the individual beams. On the other hand, the quality of the combined beam is within acceptable range, and is comparable to the qualities of the constituent beams.

Keywords: Brightness, wavelength beam combining, blazed grating, diffraction

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