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Demonstration of spectral broadening produces high-quality pulses in bursts, suggesting efficiency.
We demonstrate spectral broadening of 1 mJ, 950 fs pulses to a 5.6-fs transform limit using a two-stage multi-pass cell. The output consists of 0.6 mJ pulses, with over 500 nm bandwidth, at 100 kHz, delivered in bursts at 10 Hz, centered at 1030 nm, with excellent spatial beam quality and stability maintained for over an hour.
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Hariton et al. (2025) studied this question.
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