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. Second harmonic efficiency of ZnO nanolayers

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

    Applied Physics Letters 84 (2004) 170-172
  2. Passively mode-locked Yb:Lu2O3 laser

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

    Optics Express 12 (2004) 3125-3130
  3. Growth, optical characterization, and laser operation of epitaxial Yb:KY(WO4)2/KY(WO4)2 composites with monoclinic structure

    A. Aznar, R. Solé, M. Aguiló, F. Diaz, U. Griebner, R. Grunwald, V. Petrov

    Applied Physics Letters 85 (2004) 4313-4315
  4. Generation of ultrashort-pulse nondiffracting beams and x-waves with thin-film axicons

    R. Grunwald, U. Griebner, U. Neumann, A. Kummrow, E.T.J. Nibbering, M. Rini, M. Piché, G. Rousseau, M. Fortin, N. McCarthy, V. Kebbel

    Ultrafast Phenomena XIII Springer Verlag (2003) 247-249
  5. Generation and characterization of spatially and temporally localized few-cycle optical wave packets

    R. Grunwald, V. Kebbel, U. Griebner, U. Neumann, A. Kummrow, M. Rini, E.T.J. Nibbering, M. Piché, G. Rousseau, M. Fortin

    Physical Review A 67 (2003) 063820/1-5
  6. Spatio-temporal processing of femtosecond laser pulses with thin-film microoptics

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

    SPIE Proceedings 5181 (2003) 1-11
  7. Ultrashort-pulse wavefront autocorrelation

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

    Optics Letters 28 (2003) 2399-2401
  8. Potassium ytterbium tungstate provides the smallest laser quantum defect

    P. Klopp, V. Petrov, U. Griebner

    Japanese Journal of Applied Physics 42 (2003) 246-248
  9. Continuous-wave lasing of a stoichiometric Yb laser material: KYb(WO4)2

    P. Klopp, V. Petrov, U. Griebner, V. Nesterenko, V. Nikolov, M. Marinov, M.A. Bursukova, M. Galan

    Optics Letters 28 (2003) 322-324
  10. Continuous wave lasing of Yb3+ in a stoichiometric double tungstate

    P. Klopp, V. Petrov, U. Griebner, V. Nikolov, V. Nesterenko, T. Kirilov

    SPIE Proceedings 4968 (2003) 46-53