MBI Staff Member – Personal info


Project Coordinator 4.1: Implementation of Lasers and Measuring Techniques


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. Millijoule few-cycle 5 μm source at 1 kHz repetition rate for generating broadband pulses from the mid- to far-infrared

    G. Folpini, K. Reimann, M. Woerner, L. von Grafenstein, M. Bock, U. Griebner, T. Elsaesser

    Ultrafast Phenomena XXI 205 EPJ Web of Conferences (2019) 01014/1-3
  2. Graphene and SESAM mode-locked Yb:CNGS lasers with self-frequency doubling properties

    M. Kowalczyk, X. Zhang, X. Mateos, S. Guo, Z. Wang, X. Xu, P. Loiko, F. Rotermund, J. Sotor, U. Griebner, V. Petrov

    Optics Express 27 (2019) 590-596
  3. 67-fs pulse generation from a mode-locked Tm,Ho:CLNGG laser at 2083 nm

    Y. Zhao, Y. Wang, W. Chen, Z. Pan, L. Wang, X. Dai, H. Yuan, Y. Zhang, H. Cai, J. E. Bae, S. Y. Choi, F. Rotermund, P. Loiko, J. M. Serres, X. Mateos, W. Zhou, D. Shen, U. Griebner, V. Petrov

    Optics Express 27 (2019) 1922-1928
  4. Comparative study of Yb:KYW planar waveguide lasers Q-switched by direct- and evanescent-field interaction with carbon nanotubes

    J. W. Kim, S. Y. Choi, J. E. Bae, M. H. Kim, Y. U. Jeong, E. Kifle, X. Mateos, M. Aguiló, F. Díaz, U. Griebner, V. Petrov, G.-H. Kim, F. Rotermund

    Optics Express 27 (2019) 1488-1496
  5. Diamond saw dicing of thulium channel waveguide lasers in monoclinic crystalline films

    E. Kifle, P. Loiko, U. Griebner, V. Petrov, P. Camy, A. Braud, M. Aguiló, F. Díaz, X. Mateos

    Optics Letters 44 (2019) 1596-1599
  6. Femtosecond-laser-written Ho:KGd(WO4)2 waveguide laser at 2.1  μm

    E. Kifle, P. Loiko, C. Romero, J. R. Vázquez de Aldana, A. Ródenas, V. Zakharov, A. Veniaminov, M. Aguiló, F. Díaz, U. Griebner, V. Petrov, X. Mateos

    Optics Letters 44 (2019) 1738-1741
  7. Propagation and orbital angular momentum of vortex beams generated from a spiral phase plate-fiber

    M. Ding, Y. Chen, Y. Zhao, W. Zhou, A. Koshelev, K. Munechika, Q. Liu, T. Feng, Y. Wang, Z. Pan, D. Shen, U. Griebner, V. Petrov

    Laser Physics Letters 16 (2019) 035106/1-5
  8. Fs-laser-written thulium waveguide lasers Q-switched by graphene and MoS2

    E. Kifle, P. Loiko, J. R. Vázquez de Aldana, C. Romero, A. Ródenas, V. Zakharov, A. Veniaminov, H. Yu, H. Zhang, Y. Chen, M. Aguiló, F. Díaz, U. Griebner, V. Petrov, X. Mateos

    Optics Express 27 (2019) 8745-8755
  9. 87 fs mode-locked Tm,Ho:CaYAlO4 laser at ~2043 nm

    Y. Zhao, Y. Wang, X. Zhang, X. Mateos, Z. Pan, P. Loiko, W. Zhou, X. Xu, J. Xu, D. Shen, S. Suomalainen, A. Härkönen, M. Guina, U. Griebner, V. Petrov

    Optics Letters 43 (2018) 915-918
  10. Sub-10 optical-cycle passively mode-locked Tm:(Lu2/3Sc1/3)2O3 ceramic laser at 2 µm

    Y. Wang, W. Jing, P. Loiko, Y. Zhao, H. Huang, X. Mateos, S. Suomalainen, A. Härkönen, M. Guina, U. Griebner, V. Petrov

    Optics Express 26 (2018) 10299-10304