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We present breakthrough pulse energy performance (up to 300 μJ) from monolithic fiber-optic femtosecond laser systems that are developed for industrial materials processing. Whereas previous chirped pulse amplification (CPA) systems have implemented fiber-optic gain elements within free-space oscillator-amplifier circuits [1-3], we present monolithic fiber-optic CPA systems — where the mode-locked...
We describe measurements of the spectrogram of femtosecond pulses, propagating between 5-700 mm in distilled water. The observed pulse breakup is qualitatively related to points of stationary phase and related to possible precursor activity.
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