Spectrally combining lasers could unleash the potential of laser-plasma accelerators
https://phys.org/news/2023-07-spectrally-combining-lasers-unleash-potential.html
"fiber lasers... pulses 120 fs 100 MHz repetition rates, sent to photonic-crystal fiber, spectrum was broadened from 27 nanometers (nm) to 90 nm... dichroic mirror split pulse spectrally sent to 2 pulse shapers to shape intensity and phase... amplified by mode-locked oscillator and ytterbium-doped fiber amplifier then pulse-shaped,split by dichroic mirror... pulses 42 fs duration... spatially, temporally, and spectrally combining fiber lasers produce high-energy, tens-of-fs laser pulses... medicine, materials science, fusion"
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