Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e.V.

MBI-Mitarbeiter - Persönliche Daten

Dr. Uwe Griebner

uwe.griebner(at)mbi-berlin.de
+49 30 6392 1457

C2: Solid State Light Sources
Haus C, 2.22

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. Sub-100-fs Cr:YAG laser mode-locked by monolayer graphene saturable absorber

    Di Dio Cafiso, S. D., E. Ugolotti, A. Schmidt, V. Petrov, U. Griebner, A. Agnesi, W. B. Cho, B. H. Jung, F. Rotermund, S. Bae, B. H. Hong, G. Reali, F. Pirzio

     Optics Letters 38 (2013) 1745-1747
  2. Mode-locking of solid-state lasers by single-walled carbon-nanotube based saturable absorbers

    F. Rotermund, W. B. Cho, S. Y. Choi, I. H. Baek, J. H. Yim, S. Lee, A. Schmidt, G. Steinmeyer, U. Griebner, D.-I. Yeom, K. Kim, V. Petrov

     Quantum Electronics 42 (2012) 663-670
  3. Femtosecond pulses near 2 µm from a Tm:KLuW laser mode-locked by a single-walled carbon nanotube saturable absorber

    A. Schmidt, S. Y. Choi, D.-Il Yeom, F. Rotermund, X. Mateos, M. Segura, F. Díaz, V. Petrov, U. Griebner

     Applied Physics Express 5 (2012) 092704/1-3
  4. 175 fs Tm:Lu2O3 laser at 2.07 µm mode-locked using single-walled carbon nanotubes

    A. Schmidt, P. Koopmann, G. Huber, P. Fuhrberg, S. Y. Choi, D.-I. Yeom, F. Rotermund, V. Petrov, U. Griebner

     Optics Express 20 (2012) 5313-5318
  5. Diode-pumped 2 µm vibronic (Tm3+,Yb3+):KLu(WO4)2 laser

    M. Segura, X. Mateos, M. C. Pujol, J. J. Carvajal, M. Aguiló, F. Díaz, U. Griebner, V. Petrov

     Applied Optics 51 (2012) 2701-2705
  6. Graphene mode-locked femtosecond Yb:KLuW laser

    E. Ugolotti, A. Schmidt, V. Petrov, J. W. Kim, D.-I. Yeom, F. Rotermund, S. Bae, B. H. Hong, A. Agnesi, C. Fiebig, G. Erbert, X. Mateos, M. Aguiló, F. Díaz, U. Griebner

     Applied Physics Letters 101 (2012) 161112/1-4
  7. Passive Q-switching of a diode-pumped (Tm,Yb):KLu(WO4)2 laser near 2-mm with a Cr2+:ZnS saturable absorber

    M. Segura, X. Mateos, A. Tyazhev, M. C. Pujol, J. J. Carvajal, M. Aguiló, F. Díaz, U. Griebner, V. Petrov

     SPIE Proceedings Series 8235 (2012) 82351U/1-8
  8. Passively Q-switched Tm:YLF laser

    R. Faoro, M. Kadankov, D. Parisi, S. Veronesi, M. Tonelli, V. Petrov, U. Griebner, M. Segura, X. Mateos

     Optics Letters 37 (2012) 1517-1519
  9. Passive Q-switching of the diode pumped Tm3+:KLu(WO4)2 laser near 2-mm with Cr2+:ZnS saturable absorbers

    M. Segura, M. Kadankov, X. Mateos, M. C. Pujol, J. J. Carvajal, M. Aguiló, F. Díaz, U. Griebner, V. Petrov

     Optics Express 20 (2012) A3394-A3400
  10. Crystal growth, characterization and thin disk laser operation of KLu1-xTmx(WO4)2/KLu(WO4)2 epitaxial layers

    M. Segura, R. M. Solé, X. Mateos, J. J. Carvajal, M. C. Pujol, J. Masons, M. Aguiló, S. Vatnik, I. Vedin, V. Petrov, U. Griebner, F. Díaz

     CrystEngComm 14 (2012) 223-229