Laser beam propagation characteristics of incoherently added diode bars

Andrew Forbes; Sandile Ngcobo; Daniel Esser; Dieter Preussler; Christoph Bollig

doi:10.1117/12.793691

9 September 2008 Laser beam propagation characteristics of incoherently added diode bars

Andrew Forbes, Sandile Ngcobo, Daniel Esser, Dieter Preussler, Christoph Bollig

Proceedings Volume 7062, Laser Beam Shaping IX; 70621A (2008) https://doi.org/10.1117/12.793691
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

The second moment method of laser beam propagation allows for the calculation of the beam quality factor for any laser beam, or combination of laser beams. When several laser beams are added, their effective beam quality factor is not simply the sum of the individual beam quality factors, that is, it does not act as a linear operator. In this paper we derive an analytical expression for the beam quality factor of incoherently added laser beams whose centroids are not collinear. We illustrate the versatility of the final result by showing how this may be applied to the problem of the laser beam propagation characteristics of high power diode bar stacks.

Citation Download Citation

Andrew Forbes, Sandile Ngcobo, Daniel Esser, Dieter Preussler, and Christoph Bollig "Laser beam propagation characteristics of incoherently added diode bars", Proc. SPIE 7062, Laser Beam Shaping IX, 70621A (9 September 2008); https://doi.org/10.1117/12.793691

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