Ultrafast Nonlinear Optics group

Former organisational unit. 01/08/2015.


Organisation profile

In our group we work with efficient frequency conversion of ultrashort pulses, and seek to discover novel compression methods for generating even shorter pulses than those delivered by commercial laser systems. In particular, nonlinear optical pulses (solitons) generated in standard nonlinear crystals using cascading (phase-mismatched) frequency conversion processes are exploited to efficiently compress longer pulses towards the single cycle pulse duration limit. Mixing of ultrafast pulses in nonlinear media allows for generating energetic ultra-short few-cycle pulses at longer (mid-IR, 2.5-10 micron) and shorter (visible, 0.35-0.75 microns, upper UV, 0.2-0.35 microns) wavelengths.

We work with both state-of-the-art solid state lasers as well as the more compact and rugged fiber laser systems, and our activities are both theoretical and experimental. The overall aim is to have an accessible source of few-cycle pulses anywhere in the optical spectrum.

In the coming years we have particular focus on visible and mid-IR pulses. Such pulses can be used in a broad range of research fields for ultrafast multi-color spectroscopy, coherent excitation and probing of vibrational modes, and ultimately for controlling phase transitions in strongly correlated systems. This could lead to discovery of entirely new properties of matter. We will also expand our focus from purely bulk optics (using high-energy pulses) to also include waveguide optics (using low-energy pulses), which is interesting because the pulses originate from a much more compact laser and the low pulse energies are favorable for fragile biological samples (e.g. for performing nano-laser surgery inside living cells).


Contact information

Ørsteds Plads
Kgs. Lyngby
  • Phone: +45 4525 6352
  • Fax: +45 4593 6581
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  • Optics Express

    ISSNs: 1094-4087

    Additional searchable ISSN (Electronic): 1094-4087

    The Optical Society, United States

    BFI (2018): BFI-level 2, Scopus rating (2016): CiteScore 3.48 SJR 1.487 SNIP 1.589, ISI indexed (2013): ISI indexed yes, Web of Science (2018): Indexed yes

    Indexed in DOAJ

    Central database


  • Optics Letters

    ISSNs: 0146-9592

    Additional searchable ISSN (Electronic): 1539-4794

    Optical Society of America, United States

    BFI (2018): BFI-level 2, Scopus rating (2016): CiteScore 3.54 SJR 1.864 SNIP 1.658, ISI indexed (2013): ISI indexed yes, Web of Science (2018): Indexed yes

    Central database


  • Physical Review A (Atomic, Molecular and Optical Physics)

    ISSNs: 2469-9926

    Additional searchable ISSN (Electronic): 1094-1622, 2469-9934

    American Physical Society, United States

    BFI (2018): BFI-level 1, Scopus rating (2016): CiteScore 2.25 SJR 1.281 SNIP 0.852, ISI indexed (2013): ISI indexed yes, Web of Science (2018): Indexed yes

    Central database


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