Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy

MBI Staff Member – Personal info

Dr. Uwe Griebner

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

C2: Solid State Light Sources
Building 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 Publications

  1. Passively Q-switched femtosecond-laser-written thulium waveguide laser based on evanescent field interaction with carbon nanotubes

    E. Kifle, P. Loiko, Vázquez de Aldana, J. R., A. Ródenas, S. Y. Choi, J. E. Bae, F. Rotermund, V. Zakharov, A. Veniaminov, M. Aguiló, F. Díaz, U. Griebner, V. Petrov, X. Mateos

     Photonics Research 6 (2018) 971-980
  2. Sub-80 fs mode-locked Tm,Ho-codoped disordered garnet crystal oscillator operating at 2081 nm

    Z. Pan, Y. Wang, Y. Zhao, M. Kowalczyk, J. Sotor, H. Yuan, Y. Zhang, X. Dai, H. Cai, J. E. Bae, S. Y. Choi, F. Rotermund, P. Loiko, J. M. Serres, X. Mateos, U. Griebner, V. Petrov

     Optics Letters 43 (2018) 5154-5157
  3. Oriented zinc oxide nanorods: A novel saturable absorber for lasers in the near-infrared

    P. Loiko, T. Bora, J. M. Serres, H. Yu, M. Aguilo, F. Diaz, U. Griebner, V. Petrov, X. Mateos, J. Dutta

     Beilstein Journal of Nanotechnology 9 (2018) 2730–2740
  4. Passive Q switching of Yb:CNGS lasers by Cr4+:YAG and V3+:YAG saturable absorbers

    X. Zhang, P. Loiko, J. M. Serres, V. Jambunathan, Z. Wang, S. Guo, A. Yasukevich, A. Lucianetti, T. Mocek, U. Griebner, V. Petrov, X. Xu, M. Aguiló, F. Díaz, X. Mateos

     Applied Optics 57 (2018) 8236-8241
  5. Femtosecond-laser-written hexagonal cladding waveguide in Tm:KLu(WO4)2: µ-Raman study and laser operation

    E. Kifle, P. Loiko, X. Mateos, J. R. Vazquez De Aldana, A. Rodenas, U. Griebner, V. Petrov, M. Aguilo, F. Diaz

     Optical Materials Express 7 (2017) 4258-4268
  6. Highly-efficient laser operation of a novel trigonal silicate crystal Yb3+:Ca3NbGa3Si2O14

    X. Zhang, P. Loiko, J. M. Serres, X. Mateos, J. Ren, Z. Wang, S. Guo, X. Xu, E. Vilejshikova, U. Griebner, V. Petrov, M. Aguiló, F. Díaz

     Optical Materials Express 7 (2017) 3626-3633
  7. Single-walled carbon nanotubes oust graphene and semiconductor saturable absorbers in Q-switched solid-state lasers at 2 µm

    X. Mateos, P. Loiko, S. Y. Choi, F. Rotermund, M. Aguiló, F. Díaz, U. Griebner, V. Petrov

     Laser Physics Letters 14 (2017) 095801/1-7
  8. Holmium thin-disk laser based on Ho:KY(WO4)2/KY(WO4)2 epitaxy with 60% slope efficiency and simplified pump geometry

    X. Mateos, S. Lamrini, K. Scholle, P. Fuhrberg, S. Vatnik, P. Loiko, I. Vedin, M. Aguiló, F. Díaz, U. Griebner, V. Petrov

     Optic Letters 42 (2017) 3490-3493
  9. Sub-100  fs Tm:MgWO4 laser at 2017 nm mode locked by a graphene saturable absorber

    Y. Wang, W. Chen, M. Mero, L. Zhang, H. Lin, Z. Lin, G. Zhang, F. Rotermund, Y. J. Cho, P. Loiko, X. Mateos, U. Griebner, V. Petrov

     Optics Letters 42 (2017) 3076-3079
  10. Microchip Yb:CaLnAlO4 lasers with up to 91% slope efficiency

    P. Loiko, J. M. Serres, X. Mateos, X. Xu, J. Xu, V. Jambunathan, P. Navratil, A. Lucianetti, T. Mocek, X. Zhang, U. Griebner, V. Petrov, M. Aguilo, F. Diaz, A. Major

     Optics Letters 42 (2017) 2431-2334