Recent disk laser development at Trumpf

Gottwald, Tina; Stolzenburg, Christian; Bauer, Dominik; Kleinbauer, Jochen; Kuhn, Vincent; Metzger, Thomas; Schad, Sven‐Silvius; Sutter, Dirk; Killi, Alexander

doi:10.1117/12.978990

Cited by 31 publications

(15 citation statements)

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“…Moreover, the efficient cooling allows pumping in the kW regime and the usage of quasi three-level-system materials having low quantum defect and high gain. To date, the paradigmatic material of choice, especially in industrial applications, is ytterbium-doped yttrium aluminium garnet (Yb:YAG) [17,18,19] but recently, researchers have concentrated on finding new materials with larger thermal conductivity for higher output power, and with larger bandwidth for ultrashort pulse generation or tunable lasers [9,20,21,22,23,24,25]. 3D schematic of the pump optics: heat sink (gold), parabolic mirror (gray), and prisms acting as mirror-pairs (green and blue).…”

Section: Introductionmentioning

confidence: 99%

Thin-disk laser pump schemes for large number of passes and moderate pump source quality

Schuhmann¹,

Hänsch

Kirch³

et al. 2015

Appl. Opt.

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Novel thin-disk laser pump layouts are proposed yielding an increased number of passes for a given pump module size and pump source quality. These novel layouts result from a general scheme which bases on merging two simpler pump optics arrangements. Some peculiar examples can be realized by adapting standard commercially available pump optics simply by introducing an additional mirror-pair. More pump passes yield better efficiency, opening the way for usage of active materials with low absorption. In a standard multi-pass pump design, scaling of the number of beam passes brings about an increase of the overall size of the optical arrangement or an increase of the pump source quality requirements. Such increases are minimized in our scheme, making them eligible for industrial applications.

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Section: Introductionmentioning

confidence: 99%

Thin-disk laser pump schemes for large number of passes and moderate pump source quality

Schuhmann¹,

Hänsch

Kirch³

et al. 2015

Appl. Opt.

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“…In CW operation, the fifth generation of industrial disk lasers is now in mass production with 6 kW / disk at the workpiece. Lab results readily reach 10 kW / disk, and 4 kW / disk at fundamental mode beam quality have been shown recently [1].…”

Section: Latest Advances In High Brightness Disk Lasersmentioning

confidence: 78%

Latest Advances in High Brightness Disk Lasers

Schad

Stolzenburg²,

Michel³

et al. 2014

Laser Technik Journal

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For years disk lasers have been an ideal choice for the vast majority of high power material processing applications in the CW as well as short and ultra short pulse regime since they combine high output power with high beam quality at low investment and running cost. Ease of operation combined with highest efficiency, precision and robustness have established the disk laser as a standard tool throughout industrial applications. Tailoring laser based manufacturing chains has opened up a manifold of different areas such as high speed cutting, remote welding, brazing, cladding and hybrid welding.

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“…In multi-mode operation up to 10 kW of output power with a beam parameter product of 35 mm•mrad were demonstrated recently from a single Yb:YAG disk [3] and up to 8 kW with 3 mm•mrad [4]. Using several disks in an unstable resonator, more than 30 kW of output power could be realized [5,6].…”

Section: Current Status Of Thin-disk Laser Developmentmentioning

confidence: 99%