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Sub-10 fs pulses tunable from 480 to 980 nm from a NOPA pumped by a Yb:KGW source

We describe two noncollinear optical parametric amplifier (NOPA) systems pumped by either the second (515 nm) or the third (343 nm) harmonic of an Yb:KGW amplifier, respectively. Pulse durations as short as 6.8 fs are readily obtained by compression with commercially available chirped mirrors. The availability of both second and third harmonic for NOPA pumping allows for gap-free tuning from 520 to 980 nm. The use of an intermediate NOPA to generate seed light at 780 nm extends the tuning range of the third-harmonic pumped NOPA towards 450 nm.

preprint2014arXivOpen access

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