Post-compression of a Q-switched laser in a glass-rod multi-pass cell
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Biesterfeld, Peer Schönberg, Arthur Seitz, Marc Jimenez, Nayla Lang, Tino Seidel, Marcus Balla, Prannay Winkelmann, Lutz Sunny, Jyothish K. Fröhlich, Sven Mosel, Philip Hartl, Ingmar Calegari, Francesca Morgner, Uwe Kovacev, Milutin Heyl, Christoph M. Trabattoni, Andrea |
| author_facet | Biesterfeld, Peer Schönberg, Arthur Seitz, Marc Jimenez, Nayla Lang, Tino Seidel, Marcus Balla, Prannay Winkelmann, Lutz Sunny, Jyothish K. Fröhlich, Sven Mosel, Philip Hartl, Ingmar Calegari, Francesca Morgner, Uwe Kovacev, Milutin Heyl, Christoph M. Trabattoni, Andrea |
| contents | Q-switched lasers are compact, cost-effective, and highly pulse energy-scalable sources for nanosecond-scale laser pulses. The technology has been developed for many decades and is widely used in scientific, industrial and medical applications. However, their inherently narrow bandwidth imposes a lower limit on pulse duration - typically in the few-hundred-picosecond range - limiting the applicability of Q-switched technology in fields that require ultrafast laser pulses in the few-picosecond or femtosecond regime. In contrast, mode-locked lasers can produce broad-band, ultrafast (< 1 ps) pulses, but are complex, expensive, and typically require a large footprint. To bridge the parameter gap between these two laser platforms - in terms of pulse duration and achievable peak power - we here propose a Herriott-type multi-pass cell (MPC) based post-compression scheme for shortening the pulse durations of Q-switched lasers down to the ultrafast, picosecond regime. We experimentally demonstrate post-compression of 0.5 ns, 1 mJ pulses from a Q-switched laser to 24 ps using a compact glass-rod MPC for spectral broadening. We verify this result numerically and show that compression down to a few picoseconds is possible using the nanosecond MPC (nMPC). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_21979 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Post-compression of a Q-switched laser in a glass-rod multi-pass cell Biesterfeld, Peer Schönberg, Arthur Seitz, Marc Jimenez, Nayla Lang, Tino Seidel, Marcus Balla, Prannay Winkelmann, Lutz Sunny, Jyothish K. Fröhlich, Sven Mosel, Philip Hartl, Ingmar Calegari, Francesca Morgner, Uwe Kovacev, Milutin Heyl, Christoph M. Trabattoni, Andrea Optics Applied Physics Q-switched lasers are compact, cost-effective, and highly pulse energy-scalable sources for nanosecond-scale laser pulses. The technology has been developed for many decades and is widely used in scientific, industrial and medical applications. However, their inherently narrow bandwidth imposes a lower limit on pulse duration - typically in the few-hundred-picosecond range - limiting the applicability of Q-switched technology in fields that require ultrafast laser pulses in the few-picosecond or femtosecond regime. In contrast, mode-locked lasers can produce broad-band, ultrafast (< 1 ps) pulses, but are complex, expensive, and typically require a large footprint. To bridge the parameter gap between these two laser platforms - in terms of pulse duration and achievable peak power - we here propose a Herriott-type multi-pass cell (MPC) based post-compression scheme for shortening the pulse durations of Q-switched lasers down to the ultrafast, picosecond regime. We experimentally demonstrate post-compression of 0.5 ns, 1 mJ pulses from a Q-switched laser to 24 ps using a compact glass-rod MPC for spectral broadening. We verify this result numerically and show that compression down to a few picoseconds is possible using the nanosecond MPC (nMPC). |
| title | Post-compression of a Q-switched laser in a glass-rod multi-pass cell |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2507.21979 |