Title
Intense Few-Cycle Visible Pulses Directly Generated Via Nonlinear Fibre Mode Mixing
Author ORCID Identifier
Morandotti, Roberto: 0000-0001-7717-1519
Piccoli, Riccardo: 0000-0002-5037-5471
Razzari, Luca: 0000-0002-8514-2192
Travers, John: 0000-0003-0350-9104
Document Type
Article
Publication Date
12-1-2021
Abstract
Extremely short, high-energy pulses are essential in modern ultrafast science. In a seminal paper in 1996(1), Nisoli and co-workers demonstrated the first intense pulse compression employing a gas-filled hollow-core fibre. Despite the huge body of scientific work on this technology stemming from ultrafast and attosecond research, here we identify an unexplored few-cycle visible-light generation mechanism, which relies on the nonlinear mixing of hollow-core fibre modes. Using a commercially available ytterbium laser, we generate 4.6 fs, 20 mu J pulses centred at around 600 nm (-2 cycles, similar to 4 GW peak power), similar to 40 times shorter than the input 175fs, 1mJ pulses at 1,035 nm. Our approach thus directly projects few-hundred-femtosecond-long infrared pulses into the single-cycle regime at visible frequencies, without the need for additional post-compression. As a powerful application of our findings, we present a compact, multicolour pump-probe set-up with a temporal resolution of a few optical cycles.
Publication Source (Journal or Book title)
Nature Photonics
First Page
884
Recommended Citation
Piccoli, R., Brown, J. M., Jeong, Y. G., Rovere, A., Piccoli, R., Gaarde, M. B., Legare, F., Couairon, A., Travers, J. C., Morandotti, R., Schmidt, B. E., & Razzari, L. (2021). Intense Few-Cycle Visible Pulses Directly Generated Via Nonlinear Fibre Mode Mixing. Nature Photonics, DEC (12), 884. https://doi.org/10.1038/s41566-021-00888-7