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Intense few-cycle visible pulses directly generated via nonlinear fibre mode mixing.
- Source :
- Nature Photonics; Dec2021, Vol. 15 Issue 12, p884-889, 6p
- Publication Year :
- 2021
-
Abstract
- Extremely short, high-energy pulses are essential in modern ultrafast science. In a seminal paper in 19961, 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 μJ pulses centred at around 600 nm (~2 cycles, ~4 GW peak power), ~40 times shorter than the input 175 fs, 1 mJ 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. Direct generation of few-cycle high-energy visible pulses is demonstrated via the nonlinear mixing of hollow-core fibre modes. Compression of near-infrared laser pulses by a factor of 40 with no additional dispersion compensation delivers 4.6 fs, 20 μJ pulses (~2 cycles, ~4 GW peak power) centred at around 600 nm. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17494885
- Volume :
- 15
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Nature Photonics
- Publication Type :
- Academic Journal
- Accession number :
- 153847040
- Full Text :
- https://doi.org/10.1038/s41566-021-00888-7