MBI Staff Member – Personal info

Position

Project Member: 1.2 "Ultrafast Laser Physics and Nonlinear Optics"

Research

Mid-infrared laser becoming increasingly important for high-harmonic generation (attosecond pulse), development of novel x-ray sources, and strong-field physics. Optical parametric chirped-pulse amplification (OPCPA) seems to be the most promosing approach to generate high power midinfrared pulses, i.e. few-cyle pulses with pulse energies in the mJ range at kHz repetition rates. However, powerful pump lasers are required.

To exploite the relatively high nonlinear coefficient of non-oxide crystals, such as ZnGeP2, the emitted wavelength of the pump sources have to be above 2 µm. This ensures that the absorption in the nonlinear crystals is significantly reduced. Here we concentrate our research on regenerative amplifiers using Ho:YLF as a gain medium with a central wavelenght of around 2050 nm. Pulse energies in the millijoule regime (~10 mJ) have been achieved directly from our regenerative amplifier which was conceptually designed as a ring cavity. With the entire setup shown in Fig. 1 we are able to generate pulse energies of up to 55 mJ at 1 kHz with very low pulse-to-pulse fluctuations (rms < 0.5 %).

Fig. 1. High power 2 µm laser delivering pulse energies of up to 55 mJ. The seed-source is a three-stage system consiting of a fs Er:fiber laser, a super-continuum highly nonlinear fiber and a Tm:fiber pre amplifier. After 24 round trips a state of operation is reached where the regenerative amplifier emits stable pulses (rms < 0.3 %) of around 10 mJ at 1 kHz. A booster (two Ho:YLF crystals) stage raises the pulse energy to > 50 mJ.

Curriculum vitae

2013-present Postdoc at the Max Born Institute: High-power mid-infrared lasers

2013 Dissertation “Programmable ultrashort pulsed highly localized wave packets” at the Max Born Institute

2008-2013 Ph. D. student at the Max Born Institute

2008 Master thesis “Spatio-spectral shaping of few-cycle laser pulses with liquid crystal displays” at the Max Born Institute

2006-2008 Study of -Photonics- at the University of Applied Science Wildau (Graduation: Master of Engineering)

2005 Diploma thesis “Spatio-spectrally resolved characterization of ultrashort laser pulses” at the Max Born Institute (MBI) for Nonlinear Optics and Short Pulse Spectroscopy

2001-2005 Study of -Physical Engineering- of the department Engineering / Industrial Engineering with Business Studies at the University of Applied Science Wildau (Graduation: Diploma-Engineer)

MBI Publications

  1. High-flexibility control of structured light with combined adaptive optical systems

    R. Grunwald, M. Jurke, M. Bock, M. Liebmann, B. Poyyathuruthy Bruno, H. Gowda, U. Wallrabe

    Photonics 9 (2022) 9010042/1-13
  2. Compact high-flux hard X-ray source driven by femtosecond mid-infrared pulses at a 1 kHz repetition rate

    A. Koç, C. Hauf, M. Woerner, L. von Grafenstein, D. Ueberschaer, M. Bock, U. Griebner, T. Elsaesser

    Optics Letters 46 (2021) 210-213
  3. Tailored spectral rotation of vortex pulses by non-uniform spiral phase gratings

    M. Liebmann, A. Treffer, M. Bock, M. Jurke, U. Wallrabe, R. Grunwald

    SPIE Proceedings Series 11701 (2021) 11701V/1-7
  4. High average power OPCPA MIR-systems for coherent soft x-ray generation accessing inner-shell absorption edges of metals

    van Mörbeck-Bock, M., T. Feng, A. Heilmann, L. Ehrentraut, H. Stiel, M. Hennecke, T. Sidiropoulos, von Korff Schmising, C, S. Eisebitt, M. Schnürer

    SPIE Proceedings Series 11777 (2021) online
  5. Ultrafast NEXAFS spectroscopy in the lab using laser-based sources and advanced X-ray optics

    H. Stiel, J. Braenzel, J. Tuemmler, A. Jonas, I. Mantouvalou, A. Erko, A. Heilmann, M. Moerbeck-Bock, M. Schnürer

    SPIE Proceedings Series 11886 (2021) 11886 12/1-9
  6. Controlling the spectral rotation of ultrashort vortex pulses

    M. Liebmann, A. Treffer, M. Bock, U. Wallrabe, R. Grunwald

    SPIE Proceedings Series 11297 (2020) 12970W/1-7
  7. Needle beams: A review

    R. Grunwald, M. Bock

    Advances in Physics X 5 (2020) 1736950/1-25
  8. 27 W 2.1 µm OPCPA system for coherent soft X-ray generation operating at 10 kHz

    T. Feng, A. Heilmann, M. Bock, L. Ehrentraut, T. Witting, H. H. Yu, H. Stiel, S. Eisebitt, M. Schnürer

    Optics Express 28 (2020) 8724/1-10
  9. 2.05 μm chirped pulse amplification system at a 1 kHz repetition rate—2.4 ps pulses with 17 GW peak power

    L. v. Grafenstein, M. Bock, D. Ueberschaer, A. Koç, U. Griebner, T. Elsaesser

    Optics Letters 45 (2020) 3836-3839
  10. Multi-millijoule, few-cycle 5 μm OPCPA at 1 kHz repetition rate

    L. von Grafenstein, M. Bock, D. Ueberschaer, E. Escoto, A. Koç, K. Zawilski, P. Schunemann, U. Griebner, T. Elsaesser

    Optics Letters 45 (2020) 5998-6001