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. Thulium doped LuAG ceramics for passively mode locked lasers

    Y. Wang, R. Lan, X. Mateos, J. Li, C. Li, S. Suomalainen, A. Härkönen, M. Guina, V. Petrov, U. Griebner

     Optics Express 25 (2017) 7084-7091
  2. MoS2 saturable absorber for passive Q-switching of Yb and Tm microchip lasers

    J. M. Serres, P. Loiko, X. Mateos, H. Yu, H. Zhang, Y. Chen, V. Petrov, U. Griebner, K. Yumashev, M. Aguiló, F. Díaz

     Optical Materials Express 6 (2016) 3262-3273
  3. Vibronic thulium laser at 2131 nm Q-switched by single-walled carbon nanotubes

    P. Loiko, X. Mateos, S. Y. Choi, F. Rotermund, J. M. Serres, M. Aguilo, F. Diaz, K. Yumashev, U. Griebner, V. Petrov

     Journal of the Optical Society of America B 33 (2016) D19-D27
  4. Tm,Ho:KY(WO4)2 planar waveguide laser

    C. V. Ruiz Madroñero, X. Mateos, P. Loiko, K. Yumashev, V. Petrov, U. Griebner, M. Aguiló, F. Díaz

     Laser Physics Letters 13 (2016) 095801/1-6
  5. Growth, spectroscopy and laser operation of Ho:KY(WO4)2

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

     Journal of Luminescence 179 (2016) 50-58
  6. Temperature-dependent spectroscopy and microchip laser operation of Nd:KGd(WO4)2

    P. Loiko, S.J. Yoon, J.M. Serres, X. Mateos, S.J. Beecher, R.B. Birch, V.G. Savitski, A.J. Kemp, K. Yumashev, U. Griebner, V. Petrov, M. Aguiló, F. Díaz, J.I. Mackenzie

     Optical Materials 58 (2016) 365-372
  7. Sub-nanosecond Yb:KLu(WO4)2 microchip laser

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

     Optics Letters 41 (2016) 2620-2623
  8. Passive Q-switching of a Tm,Ho:KLu(WO4 )2 microchip laser by a Cr:ZnS saturable absorber

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

     Applied Optics 55 (2016) 3757-3763
  9. Passive Q-switching of microchip lasers based on Ho:YAG ceramics

    R. Lan, P. Loiko, X. Mateos, Y. Wang, J. Li, Y. Pan, S.Y. Choi, M. H. Kim, F. Rotermund, A. Yasukevich, K. Yumashev, U. Griebner, V. Petrov

     Applied Optics 55 (2016) 4877-4887
  10. Passive Q-switching of Yb bulk lasers by a graphene saturable absorber

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

     Applied Physics B 122 (2016) 105/1-8