High peak-power 2.1-μm femtosecond Holmium amplifier at 100 kHz
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866908382261149696 |
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| author | Suzuki, Anna Kassai, Boldizsar Wang, Yicheng Omar, Alan Löscher, Robin Tomilov, Sergei Hoffmann, Martin Saraceno, Clara J. |
| author_facet | Suzuki, Anna Kassai, Boldizsar Wang, Yicheng Omar, Alan Löscher, Robin Tomilov, Sergei Hoffmann, Martin Saraceno, Clara J. |
| contents | High-power ultrafast laser sources in the short-wave infrared region are of great interest for numerous applications, including secondary sources of radiation and processing of materials commonly opaque in the near-infrared region. In this wavelength region, direct laser amplification around 2.1-μm wavelength within the atmospheric transparency window is particularly attractive for realizing compact and efficient high-power lasers. However, this wavelength region was widely underrepresented in femtosecond laser technology so far. Here, we report on a 2.1-μm laser system delivering 97-fs pulses with an unprecedented combination of high peak power of 525 MW and high repetition rate of 100 kHz. The amplifier system consists of a mode-locked oscillator seeding a regenerative amplifier (RA) using the novel broadband material Holmium (Ho)-doped CaAlGdO4 (CALGO), operating in the chirped pulse amplification (CPA) scheme and a nonlinear compression stage based on a Herriott-type multi-pass cell (MPC) with bulk material. We demonstrate the potential of this unique laser system by generating a micro plasma in ambient air, demonstrating its high intensity for future plasma-driven secondary sources. This system bridges the gap between conventional 1-to-10 kHz amplifiers and high-power MHz laser oscillators in this attractive wavelength range. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_09096 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High peak-power 2.1-μm femtosecond Holmium amplifier at 100 kHz Suzuki, Anna Kassai, Boldizsar Wang, Yicheng Omar, Alan Löscher, Robin Tomilov, Sergei Hoffmann, Martin Saraceno, Clara J. Optics High-power ultrafast laser sources in the short-wave infrared region are of great interest for numerous applications, including secondary sources of radiation and processing of materials commonly opaque in the near-infrared region. In this wavelength region, direct laser amplification around 2.1-μm wavelength within the atmospheric transparency window is particularly attractive for realizing compact and efficient high-power lasers. However, this wavelength region was widely underrepresented in femtosecond laser technology so far. Here, we report on a 2.1-μm laser system delivering 97-fs pulses with an unprecedented combination of high peak power of 525 MW and high repetition rate of 100 kHz. The amplifier system consists of a mode-locked oscillator seeding a regenerative amplifier (RA) using the novel broadband material Holmium (Ho)-doped CaAlGdO4 (CALGO), operating in the chirped pulse amplification (CPA) scheme and a nonlinear compression stage based on a Herriott-type multi-pass cell (MPC) with bulk material. We demonstrate the potential of this unique laser system by generating a micro plasma in ambient air, demonstrating its high intensity for future plasma-driven secondary sources. This system bridges the gap between conventional 1-to-10 kHz amplifiers and high-power MHz laser oscillators in this attractive wavelength range. |
| title | High peak-power 2.1-μm femtosecond Holmium amplifier at 100 kHz |
| topic | Optics |
| url | https://arxiv.org/abs/2412.09096 |