
Proceedings Paper
First demonstration of passively mode-locked Yb:CaF2 thin-disk laserFormat | Member Price | Non-Member Price |
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Paper Abstract
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:Lu2O3 for the generation of sub-500 fs pulses in thin-disk oscillators.
Another promising and known candidate for ultra-short pulsed lasers is Yb:CaF2, which has been so far only used in bulk
laser architecture. In this work, we present the first demonstration of a mode-locked Yb:CaF2 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:CaF2 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.
Paper Details
Date Published: 20 February 2015
PDF: 7 pages
Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93420W (20 February 2015); doi: 10.1117/12.2079086
Published in SPIE Proceedings Vol. 9342:
Solid State Lasers XXIV: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)
PDF: 7 pages
Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93420W (20 February 2015); doi: 10.1117/12.2079086
Show Author Affiliations
Benjamin Dannecker, Univ. Stuttgart (Germany)
Xavier Délen, Univ. Stuttgart (Germany)
Katrin S. Wentsch, Univ. Stuttgart (Germany)
Birgit Weichelt, Univ. Stuttgart (Germany)
Xavier Délen, Univ. Stuttgart (Germany)
Katrin S. Wentsch, Univ. Stuttgart (Germany)
Birgit Weichelt, Univ. Stuttgart (Germany)
Clemens Hönninger, Amplitude Systèmes (France)
Andreas Voss, Univ. Stuttgart (Germany)
Marwan Abdou Ahmed, Univ. Stuttgart (Germany)
Thomas Graf, Univ. Stuttgart (Germany)
Andreas Voss, Univ. Stuttgart (Germany)
Marwan Abdou Ahmed, Univ. Stuttgart (Germany)
Thomas Graf, Univ. Stuttgart (Germany)
Published in SPIE Proceedings Vol. 9342:
Solid State Lasers XXIV: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)
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