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. Prospects of monoclinic Yb:KLu(WO4)2 crystal for multi-watt microchip lasers

    J. M. Serres, P. Loiko, X. Mateos, K. Yumashev, N. V. Kuleshov, V. Petrov, U. Griebner, M. Aguiló, F. Díaz

     Optical Materials Express 5 (2015) 661-667
  2. Ho:KLu(WO4)2 microchip laser Q-switched by a PbS quantum-dot-doped glass

    P. Loiko, J. M. Serres, X. Mateos, K. Yumashev, A. Malyarevich, A. Onushchenko, V. Petrov, U. Griebner, M. Aguiló, F. Díaz

     IEEE Photonics Technology Letters 27 (2015) 1795-1798
  3. Subnanosecond Tm:KLuW microchip laser Q-switched by a Cr:ZnS saturable absorber

    P. Loiko, J. M. Serres, X. Mateos, K. Yumashev, A. Yasukevich, V. Petrov, U. Griebner, M. Aguiló, F. Díaz

     Optics Letters 40 (2015) 5220-5223
  4. Graphene Q-switched compact Yb:YAG Laser

    J. M. Serres, V. Jambunathan, X. Mateos, P. Loiko, A. Lucianetti, T. Mocek, K. Yumashev, V. Petrov, U. Griebner, M. Aguiló, F. Díaz

     IEEE Photonics Journal 7 (2015) 1503307/1-7
  5. Tm3+:LiGdF4 laser, passively Q-switched with a Cr2+:ZnSe saturable absorber

    B. Oreshkov, S. Veronesi, M. Tonelli, di Lieto, A. , V. Petrov, U. Griebner, X. Mateos, I. Buchvarov

     IEEE Photonics Journal 7 (2015) 1502206/1-6
  6. Thermo-optic dispersion formulas for YCOB and GdCOB laser host crystals

    P. Loiko, X. Mateos, Y. Wang, Z. Pan, K. Yumashev, H. Zhang, U. Griebner, V. Petrov

     Optical Materials Express 5 (2015) 1089-1092
  7. Crystal growth, optical spectroscopy, and continuous-wave laser operation of co-doped (Ho,Tm):KLu(WO4)2 monoclinic crystals

    V. Jambunathan, A. Schmidt, X. Mateos, M. C. Pujol, U. Griebner, V. Petrov, C. Zaldo, M. Aguiló, F. Díaz

     Journal of The Optical Society America B 31 (2014) 1415-1421
  8. Wavelength-versatile graphene-gold film saturable absorber mirror for ultra-broadband mode-locking of bulk lasers

    J. Ma, G. Xie, P. Lv, W. Gao, P. Yuan, L. Qian, U. Griebner, V. Petrov, H. Yu, H. Zhang, J. Wang

     Scientific Reports 4 (2014) 5016/1-6
  9. Absorption recovery dynamics in 2 µm GaSb-based SESAMs

    J. Paajaste, S. Suomalainen, A. Härkönen, U. Griebner, G. Steinmeyer, M. Guina

    Journal of Physics D-Applied Physics 47 (2014) 065102/1-6
  10. Carbon nanostructure-based saturable absorber mirror for a diode-pumped 500-MHz femtosecond Yb:KLu(WO4)2 laser

    S. Y. Choi, J. W. Kim, M. H. Kim, D.-I. Yeom, B. H. Hong, X. Mateos, M. Aguiló, F. Díaz, V. Petrov, U. Griebner, F. Rotermund

     Optics Express 22 (2014) 15626-15631