Spectral broadening and post-compression of a high-repetition rate Yb-pumped OPA in the visible and ultraviolet. Kaufman, B., Larsen, K. A., Allum, F., Britton, M., Castellanos, J. L. G., Wilson, R., Bradforth, S. E., Brahms, C., Travers, J. C., Robinson, J. S., Bain, M., & Forbes, R. Opt. Lett., 50(24):7464–7467, Optica Publishing Group, Dec, 2025. 
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Paper abstract bibtex We demonstrate spectral broadening and post-compression of high-repetition-rate visible and near-UV pulses from a commercial Yb-pumped optical parametric amplifier (OPA). Second-harmonic pulses from the signal of a 515 nm-pumped OPA (350–500 nm) were broadened via self-phase modulation in a single gas-filled stretched hollow-core fiber to bandwidths supporting sub-30 fs durations. Post-compression using a prism compressor or, for the shortest pulses, chirped mirrors yielded durations as short as 15 fs. The source offers simultaneous tunability in wavelength, bandwidth (Fourier limits 70 fs to sub-10 fs), and pulse duration at repetition rates up to 33 kHz.
@article{doi:10.1364/OL.575959,
author = {Brian Kaufman and Kirk A. Larsen and Felix Allum and Mathew Britton and Jos\'{e} L. God\'{i}nez Castellanos and Rose Wilson and Stephen E. Bradforth and Christian Brahms and John C. Travers and Joseph S. Robinson and Matthew Bain and Ruaridh Forbes},
journal = {Opt. Lett.},
keywords = {Dielectric mirrors; Fourier transforms; Laser amplifiers; Mirrors; Optical amplifiers; Pulse compression},
number = {24},
pages = {7464--7467},
publisher = {Optica Publishing Group},
title = {Spectral broadening and post-compression of a high-repetition rate Yb-pumped OPA in the visible and ultraviolet},
volume = {50},
month = {Dec},
year = {2025},
url = {https://opg.optica.org/ol/abstract.cfm?URI=ol-50-24-7464},
abstract = {We demonstrate spectral broadening and post-compression of high-repetition-rate visible and near-UV pulses from a commercial Yb-pumped optical parametric amplifier (OPA). Second-harmonic pulses from the signal of a 515 nm-pumped OPA (350--500 nm) were broadened via self-phase modulation in a single gas-filled stretched hollow-core fiber to bandwidths supporting sub-30 fs durations. Post-compression using a prism compressor or, for the shortest pulses, chirped mirrors yielded durations as short as 15 fs. The source offers simultaneous tunability in wavelength, bandwidth (Fourier limits 70 fs to sub-10 fs), and pulse duration at repetition rates up to 33 kHz.},
bibbase_note ={<img src="https://opg.optica.org/getThumbnail.cfm?uri=ol-50-24-7464&s=n&size=168">}
}
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