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. Continuous-wave laser performance of Tm:LuVO4 under Ti:sapphire laser pumping

    Di Trapani, F., X. Mateos, V. Petrov, A. Agnesi, U. Griebner, H. Zhang, J. Wang, H. Yu

     Laser Physics 24 (2014) 035806/1-4
  2. Engineering lattice matching, doping level, and optical properties of KY(WO4)2:Gd, Lu, Yb layers for a cladding-side-pumped channel waveguide laser

    S. Aravazhi, D. Geskus, K. van Dalfsen, S. A. Vázquez-Córdova, C. Grivas, U. Griebner, S. M. García-Blanco, M. Pollnau

     Applied Physics B - Lasers and Optics 111 (2013) 433-446
  3. Energy scaling of a multipass-cavity mode-locked femtosecond bulk laser with a carbon nanotube saturable absorber

    I. Baylam, S. Ozharar, H. Cankaya, S. Y. Choi, K. Kim, F. Rotermund, U. Griebner, V. Petrov, A. Sennaroglu

     SPIE Proceedings Series 8599 (2013) 859914/1-7
  4. Diode-pumped continuous-wave laser operation of co-doped (Ho,Tm):KLu(WO4)2 monoclinic crystal

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

     Optics and Laser Technology 54 (2013) 326-328
  5. Yb:KYW planar waveguide laser Q-switched by evanescent-field interaction with carbon nanotubes

    J. W. Kim, S. Y. Choi, D.-I. Yeom, S. Aravazhi, M. Pollnau, U. Griebner, V. Petrov, F. Rotermund

     Optics Letters 38 (2013) 5090-5093
  6. Dual wavelength diode-pumped laser operation of Np-cut and Ng-cut Tm:KLu(WO4)2 crystals

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

     Applied Physics B 113 (2013) 125-131
  7. Sub-50-fs mode-locking of a Cr:YAG laser using an SWCNT-SA

    Di Dio Cafiso, S. D., E. Ugolotti, A. Schmidt, V. Petrov, U. Griebner, A. Agnesi, W. B. Cho, Y. G. Zhang, S. Y. Choi, F. Rotermund, G. Reali, F. Pirzio

     Laser Physics Letters 10 (2013) 085801/1-3
  8. Optimization of dopant concentration in Ho:KLu(WO4)2 laser achieving ~70% slope efficiency

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

     Laser Physics 23 (2013) 125801/1-4
  9. Optical spectroscopy of Tm3+:YAG transparent ceramics

    J. T. Thomas, M. Tonelli, S. Veronesi, E. Cavalli, X. Mateos, V. Petrov, U. Griebner, J. Li, Y. Pan, J. Guo

     Journal of Physics D-Applied Physics 46 (2013) 375301/1-7
  10. Passively Q-switched Tm:BaY2F8 lasers

    H. Yu, S. Veronesi, X. Mateos, V. Petrov, U. Griebner, D. Parisi, M. Tonelli

     SPIE Proceedings Series 8786 (2013) 878616/1-8