Abstract
We demonstrate a continuous-wave ytterbium-doped fiber amplifier which produces 6.3 W at a wavelength of 972.5 nm. We frequency-quadruple this source in two resonant doubling stages to generate 530 mW at 243.1 nm. Radiation at this wavelength is required to excite the 1S–2S transition in atomic hydrogen and could therefore find application in experimental studies of hydrogen and anti-hydrogen.
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We gratefully acknowledge Jacob Roberts for useful discussions and for carefully reviewing this manuscript.
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This article is part of the topical collection “Enlightening the World with the Laser” - Honoring T. W. Hänsch guest edited by Tilman Esslinger, Nathalie Picqué, and Thomas Udem.
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Burkley, Z., Rasor, C., Cooper, S.F. et al. Yb fiber amplifier at 972.5 nm with frequency quadrupling to 243.1 nm. Appl. Phys. B 123, 5 (2017). https://doi.org/10.1007/s00340-016-6583-9
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DOI: https://doi.org/10.1007/s00340-016-6583-9