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arXiv · 2502.01322

Tunable megawatt-scale sub-20 fs visible pulses from a fiber laser source

Mohammed Sabbah·Robbie Mears·Leah R. Murphy·Kerrianne Harrington·James M. Stone·Tim A. Birks·John C. Travers
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Abstract

Ultrafast laser pulses that are both tunable in wavelength and very short in duration are essential tools in fields ranging from biomedical imaging to ultrafast spectroscopy. While resonant dispersive-wave emission in gas-filled hollow-core fibers is a powerful technique for generating such pulses, it has traditionally required complex and expensive pump laser systems. In this work, we present a more compact and accessible alternative that combines gain-managed nonlinear amplification with resonant dispersive-wave emission. Our system produces sub-20 femtosecond pulses tunable from 400 nm to beyond 700 nm, with energies up to 39 nJ and peak powers exceeding 2 MW, operating at a 4.8 MHz repetition rate. This compact and efficient laser source opens new avenues for deploying resonant dispersive-wave-based technologies for broader scientific and industrial applications.

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Mohammed Sabbah, Robbie Mears, Leah R. Murphy, Kerrianne Harrington, James M. Stone, Tim A. Birks, John C. Travers. 2025-02-03. Tunable megawatt-scale sub-20 fs visible pulses from a fiber laser source. https://doi.org/10.1364/optica.558810

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