Efficient pump beam shaping for high-power thin-disk laser systems

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We report a beam-shaping technique whereby the output power from a high-power laser-diode stack is efficiently coupled, reconfigured, and transmitted to a thin-disk laser by means of a compact optical fiber bundle. By using this technique, the power density is increased by a factor of 2 when compared to direct coupling with a octagonal fused silica rod while the numerical aperture is kept constant. Transmission efficiency of 80% was measured for the beam shaper without antireflection coating. The top-hat distribution is numerically calculated at the thin-disk laser crystal. (c) 2010 Optical Society of America OCIS codes: 140.0140, 140.3300, 140.3460, 140.3480.
Original languageUnknown
Pages (from-to)5157-5162
JournalApplied Optics
Issue number27
Publication statusPublished - 1 Jan 2010

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