Recent development of disk lasers at TRUMPF

Schad, Sven‐Silvius; Gottwald, Tina; Kuhn, Vincent; Ackermann, Matthias; Bauer, Dominik; Scharun, Michael; Killi, Alexander

doi:10.1117/12.2212789

Cited by 17 publications

(8 citation statements)

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“…The Ho:YAG thin‐disk laser's output power and optical‐to‐optical efficiency are also significantly higher than any previously reported 2 μm thin‐disk lasers. In particular, the slope efficiency, at 61%, approached that of Yb:YAG thin‐disk lasers operating at 1 μm wavelength, pointing to the feasibility for future Ho:YAG lasers to deliver output at levels comparable to established Yb:YAG systems.…”

Section: Discussionmentioning

confidence: 91%

“…In the Ho:YAG case, this power could be provided by powerful 1908 nm diode lasers which are gradually lowering in price, thus mirroring the success and flexibility of diode pumped Yb:YAG thin‐disk lasers. Although the current pump head can only handle 3 kW of pump power, the 72‐pass pump‐cavity design can in principle be applied to larger pump heads that can sustain 16 kW of pump power, enabling a potential output power beyond 1 kW.…”

Section: Discussionmentioning

confidence: 99%

“…Slab and fiber amplifiers have demonstrated high performance at 2 μm wavelength, delivering an output power of approximately 200 W and 1 kW respectively . Thin‐disk technology has also been demonstrated successfully at 1 μm, with 10 kW power extracted from a Yb:YAG thin‐disk continuous‐wave (CW) laser based on a single disk . Further scaling to 30 kW has also been demonstrated using 10 disks within a single resonator .…”

Section: Introductionmentioning

confidence: 99%

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High‐Power, High‐Efficiency Tm:YAG and Ho:YAG Thin‐Disk Lasers

Zhang

Schulze

Mak

et al. 2018

Laser & Photonics Reviews

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Continuous‐wave Tm:YAG and Ho:YAG thin‐disk lasers with maximum optical‐to‐optical efficiencies of 41% and 58% respectively are presented. Pumped by a 780 nm laser diode, the Tm:YAG laser generated a maximum output power of 24 W. In comparison, the Ho:YAG laser, pumped by a fiber laser at 1908 nm, delivered a maximum output power of 50 W. The reported output powers are, to the best of our knowledge, the highest among all thin‐disk lasers emitting at ≈2 μm, and provide a solid foundation for the further development of next‐generation 2 μm thin‐disk technologies.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High‐Power, High‐Efficiency Tm:YAG and Ho:YAG Thin‐Disk Lasers

Zhang

Schulze

Mak

et al. 2018

Laser & Photonics Reviews

Self Cite

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“…Power scaling thin-disk oscillators involves simultaneously increasing the pump and laser spot size on the disk. This approach has been extremely successful, in fact cw thin-disk oscillators delivering up to 10 kW in multi-mode operation have been demonstrated [26].…”

Section: Cavity Designmentioning

confidence: 99%

Power scaling of ultrafast oscillators: 350-W average-power sub-picosecond thin-disk laser

et al. 2019

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We report a semiconductor saturable absorber mirror (SESAM)-modelocked thin-disk laser oscillator delivering a record 350-W average output power with 940-fs, 39-µJ pulses at 8.88-MHz repetition rate and 37-MW peak power. This oscillator is based on the Yb:YAG gain material and has a large pump spot on the disk. The cavity design includes an imaging scheme, which results in multiple reflections on the disk gain medium to enable a larger output coupling rate compared to those used in thin-disk oscillators with a single reflection on the disk. This reduces the intracavity power for a given output power, thus decreasing the stress on the intracavity components. We operate the laser in a low-pressure environment in order to limit the disk's thermal lensing and drastically reduce the nonlinearity picked up in the intracavity air medium. The combination of the imaging scheme and low-pressure operation paves the way to further power scaling of ultrafast thin-disk oscillators toward the kW milestone.

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“…One of the latest technological developments in CW high power disk lasers is the new generation of TRUMPF's TruDisk product line offering up to 6 kW output power from a single disk at a wavelength of 1030 nm with high beam quality of up to 4 mm•mrad ( Figure 5). 7 This device comes along with a footprint, reduced by 50 % compared to previous models. TRUMPF was eager to provide an industrially even more robust laser device with an innovative and space-saving cooling architecture (Supply temperature of 5 -38°C) as well as significantly increased system efficiency e.g.…”

mentioning

confidence: 99%

Advanced industrial laser systems and applications

Schmidt

Schaefer

2018

High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VII

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Industrial laser systems continue to evolve in terms of power levels, brightness and mode of operation. While continouswave (cw) laser systems drive to more efficiency, compactness and robustness, ultra-short pulse (USP) solid-state lasers (SSL) gain increasing attention from industry due to their higher average power levels, increasing pulse energies and more flexible repetition rates, eventually enabling increased productivity and novel materials processing applications. TRUPMF's laser systems portfolio starting in 1985 mirrors this general development and is therefore an interesting subject to reflect the path of industrial laser systems from early CO 2 lasers to the latest generation of diode pumped nanosecond-pulsed disk lasers with up to 400W of average output power at 343nm. Today, our advanced laser families enable novel applications such as EUV light generation, laser lift-off and surface annealing.

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Recent development of disk lasers at TRUMPF

Cited by 17 publications

References 1 publication

High‐Power, High‐Efficiency Tm:YAG and Ho:YAG Thin‐Disk Lasers

High‐Power, High‐Efficiency Tm:YAG and Ho:YAG Thin‐Disk Lasers

Power scaling of ultrafast oscillators: 350-W average-power sub-picosecond thin-disk laser

Advanced industrial laser systems and applications

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