Abstract
A large-aperture Nd:YAG thin-disk laser directly cooled by liquid is end-pumped by two
spatial self-organized laser diode arrays. The pump coupling efficiency reaches as high as 93%.
Without any complex pump coupling components, the structure becomes simplified and compact. By
optimizing the incident angle of the pump beam, a pump power density of 578 W/cm2 is achieved with a
pump uniformity of 5.52%. Up to 1 346-W peak output power with a slope efficiency of 54.9% is
obtained when pumping with a long pulse. The near-field pattern of the laser output is uniform.
© 2013 Chinese Optics Letters
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