MBI-Mitarbeiter - Persönliche Daten

Position

Project Coordinator 4.1: Implementation of Lasers and Measuring Techniques

Research

Development of advanced ultrashort pulse lasers, amplifiers, and parametric devices operating in the near- and mid-IR wavelength ranges including components and complete systems for direct implementation within other projects at MBI.

An example is the development of novel CPA laser sources emitting around 2 µm wavelength. This laser system operating at kilohertz repetition rate will serve as driver for OPCPA in the mid-IR. Figure (a) shows the simulated bifurcation diagram of a Ho:YLF regenerative amplifier (RA) at a 1 kHz repetition rate and 24 round trips indicating the most interesting operation regimes, i.e., stable double-pulsing (yellow coded bar) and the single-energy regime (green coded bar) beyond the final bifurcation point (BP final). Based on our model the RA is designed for operation in the single-energy regime beyond BPfinal. The measured complete RA bifurcation diagram of the re-designed RA at 1 kHz and 24 round trips is presented in Fig. (b). It agrees well with our numerical simulations [Fig. (a)]. Only the predicted multi-pulsing between 20 and 30 W pump power is less pronounced in the experiment. The highest pulse energy of 12 mJ can be extracted in the stable double-pulsing regime in the upper bifurcation branch (yellow coded bar), however at 0.5 kHz, the half of the repetition rate. BPfinal appears at a pump power of 47 W and denotes the transition to the single-energy regime where any multi-stabilities and chaotic behavior have been overcome. The extracted RA pulse energy of 9.7 mJ is the by far highest reported for 2-µm RAs operating in the single-energy regime. Taking into account the applied pump power of 50 W, the extraction efficiency is as high as 19.5%. Performing the transition from the stable double-pulsing to the single-energy regime, the RA’s pulse-to-pulse stability is further improved with a rms value <0.5%. Figure (c) shows the corresponding pulse stability measurement in the vicinity of BPfinal and beyond in the single-energy regime (green coded bar).

Curriculum vitae

since 1992 Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany, staff scientist and project coordinator.

1993 - 1996 Ph.D. thesis at the Optical Institute, Technical University Berlin, Germany, with Prof. Horst Weber,
Title of thesis: Fiber bundle lasers with high average power,

1989 - 1992 Institute of Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany, staff scientist,

1986 - 1989 Institute of Mechanics, Chemnitz, Germany, staff scientist,

1981 - 1986 Diploma degree in Physics; Physics Department, University of Jena, Germany,
Title of thesis: Characterization of lattice distorsions in LiF crystals,

MBI Publikationen

  1. Laser operation of bulk crystals and epitaxially grown composites of Yb:KLu(WO4)2

    U. Griebner, S. Rivier, J. Liu, M. Rico, R. Grunwald, V. Petrov, X. Mateos, A. Aznar, J. Massons, J. Gavalda, R. Sole, M. Aguilo, F. Diaz

    OSA Trends in Optics and Photonics (TOPS) 98 (2005) 162-166
  2. Passively mode-locked Yb:KLu(WO4)2 oscillators

    U. Griebner, S. Rivier, V. Petrov, M. Zorn, G. Erbert, M. Weyers, X. Mateos, M. Aguiló, J. Massons, F. Días

    Optics Express 13 (2005) 3465-3470
  3. Recent advances in thin-film microoptics

    R. Grunwald, U. Neumann, U. Griebner, G. Stibenz, S. Langer, G. Steinmeyer, V. Kebbel, M. Piché

    SPIE Proceedings 5827 (2005) 187-199
  4. Second harmonic performance of a-axis oriented ZnO nanolayers on sapphire substrates

    U. Neumann, R. Grunwald, U. Griebner, G. Steinmeyer

    Applied Physics Letters 87 (2005) 171108/1-3
  5. Tunable laser operation of ytterbium in disordered single crystals of Yb: NaGd(WO4)2

    M. Rico, J. Liu, U. Griebner, V. Petrov, M. D. Serrano, F. Esteban-Betegón, C. Cascales, C. Zaldo

    Optics Express 12 (2004) 5362-5367
  6. Efficient tunable laser operation of Tm: KGd(WO4)2 in the continuous-wave regime at room temperature

    V. Petrov, F. Güell, J. Massons, J. Gavalda, R. M. Sole, M. Aguilo, F. Diaz, U. Griebner

    IEEE Journal of Quantum Electronics 40 (2004) 1244-1251
  7. Passively mode-locked Yb:Lu2O3 laser

    U. Griebner, V. Petrov, K. Petermann, V. Peters

    Optics Express 12 (2004) 3125-3130
  8. Ultrafast spatio-temporal processing with thin-film microoptics

    R. Grunwald, V. Kebbel, U. Neumann, U. Griebner, M. Piché

    Optical Engineering 43 (2004) 2518-2524
  9. Spatio-temporal control of laser beams with thin-film shapers

    R. Grunwald, U. Neumann, U. Griebner, V. Kebbel, H.-J. Kuehn

    SPIE Proceedings 5333 (2004) 1-11
  10. Wavefront autocorrelation of femtosecond laser beams

    R. Grunwald, U. Neumann, U. Griebner, K. Reimann, G. Steinmeyer, V. Kebbel

    SPIE Proceedings 5333 (2004) 122-130