An alexandrite laser system for positronium laser cooling
We report on a Q-switched alexandrite based ∼ 100 ns long pulse duration ultra-violet laser system. The central wavelength of the fundamental pulse is set by a Volume Bragg Grating in reflection and can be tuned between 728 nm and 742 nm. The spectral bandwidth is ∼ 130 GHz. This laser system was designed in view of Doppler cooling of a cloud of a near room temperature positronium by strongly saturating the 1 3 S – 2 3 P transition. In addition, we report on the development of a KD*P Pockels cell driver designed to both Q-switch the cavity and induce a sharp falling edge of the laser pulse so that the end of the positronium-laser interaction time can be controlled with nanosecond precision. • Positronium laser cooling. • Long UV laser pulse. • Volume Bragg grating. • Square-shape.
Authors
- R.S. Brusa (ORCID: https://orcid.org/0000-0002-5239-7172)
- M. Doser (ORCID: https://orcid.org/0000-0002-3618-0889)
- L. Penasa (ORCID: https://orcid.org/0000-0003-3117-5826)
- Marco Volponi (ORCID: https://orcid.org/0000-0002-5048-8708)
- T. Wolz (ORCID: https://orcid.org/0000-0002-6810-2404)
- L. Cabaret
- L. T. Glöggler (ORCID: https://orcid.org/0000-0003-0194-8680)
- D. Comparat (ORCID: https://orcid.org/0000-0001-5884-2882)
- V. Krumins (ORCID: https://orcid.org/0000-0002-2689-7421)
- S. Ḣuck (ORCID: https://orcid.org/0009-0000-6260-6516)
- B. Rienäcker (ORCID: https://orcid.org/0000-0002-3836-7030)
- R. Caravita
- A. Camper (ORCID: https://orcid.org/0000-0002-8664-3693)
- S. Mariazzi
- Natali Gusakova (ORCID: https://orcid.org/0000-0002-8064-8039)
- G. Khatri (ORCID: https://orcid.org/0000-0001-8901-3817)
- J. Malamant
- F. P. Gustafsson (ORCID: https://orcid.org/0000-0003-2063-4310)
Institutions
- Centre National de la Recherche Scientifique (FR)
- University of Liverpool (GB)
- Universität Hamburg (DE)
- University of Oslo (NO)
- University of Trento (IT)
- Norwegian University of Science and Technology (NO)
- Université Paris-Saclay (FR)
- Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications (IT)
- Laboratoires d'Anjou (France) (FR)
- Laboratoire Aimé Cotton (FR)
- European Organization for Nuclear Research (CH)
- University of Latvia (LV)
Publication Details
- Journal
- Optics & Laser Technology
- Published
- 2024-11-27
- DOI
- https://doi.org/10.1016/j.optlastec.2024.112097
- Citations
- 2
- Primary Topic
- Optical properties and cooling technologies in crystalline materials
- Type
- article
- Field-Weighted Citation Impact
- 0.68
Funders
- Engineering and Physical Sciences Research Council