Abstract
A simple high-power tunable femtosecond laser system for ultrafast spectroscopy has been developed. A cavity-dumped, hybridly mode-locked dye laser oscillator is followed by an external compressor consisting of two-stage prism pairs and an optical fiber. The system produces well-controlled pulses tunable in a range of 595–623 nm, with a peak power of 27 kW and a minimum width of 51 fs. As an application, ultrafast optical Kerr response of β-carotene is observed using this source.
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