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20 June 2024 50W UV nanosecond laser with high beam quality by conversion of high-power IR fiber amplifier based on an innovative rod-type fiber
Amelie Chervet, Baptiste Leconte, Romain Dauliat, Arnaud Guillossou, Julien Didierjean, Katrin Wondraczek, Philippe Roy, Raphaël Jamier
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Proceedings Volume PC13003, Fiber Lasers and Glass Photonics: Materials through Applications IV; PC1300305 (2024) https://doi.org/10.1117/12.3021677
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
We obtained 51 W of UV laser light at 343nm for 8 ns temporally square-shape pulse at 400 kHz repetition rate which corresponds to a peak power of 42.5kW and a conversion rate of 38% from a 133W linearly polarized signal at 1030nm. This high UV power is achieved by third harmonic generation of infrared beam which is generated thanks to a newly developed Ytterbium-doped rod-type high-power amplifier effectively singlemode fiber with a hybrid hexagonal and aperiodic cladding design. Two fibers with MFD at 47µm and 67µm were tested. The 47µm MFD fiber allow to reach up to 200W of singlemode signal before the TMI appearance. This fiber can deliver 150 W of 1030 nm signal with a 250 W pump light, for different nanosecond pulse durations and repetition rates with excellent beam quality (M²<1.1).
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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Amelie Chervet, Baptiste Leconte, Romain Dauliat, Arnaud Guillossou, Julien Didierjean, Katrin Wondraczek, Philippe Roy, and Raphaël Jamier "50W UV nanosecond laser with high beam quality by conversion of high-power IR fiber amplifier based on an innovative rod-type fiber", Proc. SPIE PC13003, Fiber Lasers and Glass Photonics: Materials through Applications IV, PC1300305 (20 June 2024); https://doi.org/10.1117/12.3021677
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KEYWORDS
Fiber amplifiers
Ultraviolet radiation
Nanosecond lasers
Fiber lasers
Infrared lasers
Pulse signals
Monochromatic aberrations
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