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. Polarization switching in the 2-mm Tm:KLu(WO4)2 laser

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

     Laser Physics Letters 9 (2012) 104-109
  2. Efficient thin-disk Tm-laser operation based on Tm:KLu(WO4)2/KLu(WO4)2 epitaxies

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

     Optics Letters 37 (2012) 356-358
  3. Theory of passive mode locking of solid-state lasers using metal nanocomposites as slow saturable absorbers

    K.-H. Kim, U. Griebner, J. Herrmann

     Optics Letters 37 (2012) 1490-1492
  4. Steady state mode-locking of a 1.34 mm Nd:YVO4 laser with a single-walled carbon nanotube saturable absorber

    H. Iliev, I. Buchvarov, S. Y. Choi, K. Kim, F. Rotermund, U. Griebner, V. Petrov

     Applied Physics B - Lasers and Optics 106 (2012) 1-4
  5. Theory of passive mode-locking of semiconductor disk lasers in the blue spectral range by metal nanocomposites

    K.-H. Kim, U. Griebner, J. Herrmann

     Optics Express 20 (2012) 16174-16179
  6. Compact passively Q-switched diode-pumped Tm:LiLuF4 laser with 1.26 mJ output energy

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

     Optics Letters 37 (2012) 2544-2546
  7. Ho:KRE(WO4)2, RE=(Y, Gd, Lu), CW laser performance near 2.1 micron under resonant pumping by a Tm:KLu(WO4)2 laser

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

     SPIE Proceedings Series 8235 (2012) 823517/1-7
  8. Femtosecond Nd:glass lasers pumped by single-mode laser diodes and mode-locked with carbon nanotube or semiconductor saturable absorber mirrors

    A. Agnesi, A. Greborio, F. Pirzio, E. Ugolotti, G. Reali, S. Y. Choi, F. Rotermund, U. Griebner, V. Petrov

     IEEE Journal of Selected Topics in Quantum Electronics 18 (2012) 74-80
  9. Energy scaling of a carbon nanotube saturable absorber mode-locked femtosecond bulk laser

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

     Optics Letters 37 (2012) 3555-3557
  10. Optimizing single-walled-carbon-nanotube-based saturable absorbers for ultrafast lasers

    S. Ferrari, M. Bini, D. Capsoni, P. Galinetto, M. S. Grandi, U. Griebner, G. Steinmeyer, A. Agnesi, F. Pirzio, E. Ugolotti, G. Reali, V. Massarotti

     Advanced Functional Materials 22 (2012) 4369-4375