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Nonlinear pulse compression in a multi-pass cell
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DOI：10.1364/OL.41.004511.png)
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Abstract
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We demonstrate a scheme for nonlinear pulse compression at high average powers based on self-phase modulation in a multi-pass cell using fused silica as the nonlinear medium. The scheme is suitable for compression of pulses with peak powers exceeding the threshold for critical self-focusing. At >400 W of input power, the pulses of a Yb:YAG-Innoslab laser system (10 MHz repetition rate, 850 fs pulse duration) are spectrally broadened from 1.6 to >13.5 nm bandwidth while maintaining almost diffraction-limited beam quality. The chirp is removed with a dispersive mirror compressor, and pulse durations of 170 fs at an output power of 375 W are achieved. The compression unit reaches an overall transmission of >90%. (C) 2016 Optical Society of America
Keywords:
HIGH-HARMONIC GENERATION
MHZ REPETITION RATE
AVERAGE POWER
FS PULSES
100 W
FIBER
AMPLIFIER
LASER
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