Near fundamental mode high-power thin-disk laser

Schad, Sven‐Silvius; Kuhn, Vincent; Gottwald, Tina; Negoita, V.; Killi, Alexander; Wallmeroth, K.

doi:10.1117/12.2046689

Cited by 27 publications

(10 citation statements)

References 4 publications

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“…The current record for fundamental-mode operation was demonstrated utilizing a 44-pass pump cavity and thus a very thin crystal, zero-phonon-line-pumping and optimization of the resonator for the working point at maximum output power. Here, 4 kW output power with a beam quality factor of M²=1.38 could be demonstrated [10].…”

Section: Current Status Of Thin-disk Laser Developmentmentioning

confidence: 95%

Recent progress in thin-disk lasers based on various Yb-doped materials

Negel

Piehler

Weichelt

et al. 2014

Advanced Solid State Lasers

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Section: Current Status Of Thin-disk Laser Developmentmentioning

confidence: 95%

Recent progress in thin-disk lasers based on various Yb-doped materials

Negel

Piehler

Weichelt

et al. 2014

Advanced Solid State Lasers

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“…Since an efficiently cooled Yb-doped thin-disk is used as active medium, the laser yields strongly reduced thermal aberrations and thermo-mechanical stress for highest beam qualities even at elevated output powers. 6 In comparison to fiber lasers the large diameter of the pump spot on the disk allow pumping with low brightness diodes (~450 mm•mrad).…”

Section: Disk Laser Platformmentioning

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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“…The thin-disk laser (TDL) concept [1] offers good scalability of both, average power and pulse energy in pulsed operation. Up to 4 kW of laser power from a single disk with close to diffraction limited (M²<1.4) beam quality in continuous-wave (cw) operation have been demonstrated with this concept, using Yb:YAG as gain material [2]. Yb:YAG and Yb:LuAG are currently the most common materials for thin-disk lasers.…”

Section: Introductionmentioning

confidence: 98%

First demonstration of passively mode-locked Yb:CaF₂thin-disk laser

et al. 2015

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The need for ultra-short (sub-ps) pulsed laser systems with high power and high energy has advanced the mode-locked Ytterbium-doped thin-disk technology in the last decade. Therefore several research groups have made efforts to explore new laser crystals e.g. Yb:SSO, Yb:CAlGO or Yb:Lu 2 O 3 for the generation of sub-500 fs pulses in thin-disk oscillators. Another promising and known candidate for ultra-short pulsed lasers is Yb:CaF 2 , which has been so far only used in bulk laser architecture. In this work, we present the first demonstration of a mode-locked Yb:CaF 2 laser in thin-disk configuration. The resonator cavity was designed for eight passes through the disk per roundtrip at a repetition rate of 35 MHz. A saturable absorber mirror (SESAM) was used to obtain the soliton mode-locking. We achieved close-to transform-limited pulses with a pulse duration of less than 445 fs and an emission spectral width of 2.6 nm at FWHM (i.e. time-bandwidth product of 0.323). At the average output power of 6.6 W this corresponds to a peak-power of 430 kW and pulse energy of 190 nJ. To the best of our knowledge, this is the highest average output power and pulse energy using Yb:CaF 2 as gain material reported to date. Taking into account the dispersion, self-phase modulation, pulse energy, output coupling ratio and laser gain, the pulse-duration estimated from the soliton-equation and our numerical calculations of pulse-propagation is in good agreement with the pulse-duration obtained in the experiment. Higher powers and shorter pulse-durations with this material are the subject of our future investigations.

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Near fundamental mode high-power thin-disk laser

Cited by 27 publications

References 4 publications

Recent progress in thin-disk lasers based on various Yb-doped materials

Recent progress in thin-disk lasers based on various Yb-doped materials

Advanced industrial laser systems and applications

First demonstration of passively mode-locked Yb:CaF₂thin-disk laser

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Near fundamental mode high-power thin-disk laser

Cited by 27 publications

References 4 publications

Recent progress in thin-disk lasers based on various Yb-doped materials

Recent progress in thin-disk lasers based on various Yb-doped materials

Advanced industrial laser systems and applications

First demonstration of passively mode-locked Yb:CaF2thin-disk laser

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First demonstration of passively mode-locked Yb:CaF₂thin-disk laser