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Broadband Mid-Infrared Source Tunable through 3-11pm Based on Yb-doped Laser and Dual OPA Setup

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Abstract

We present a technique for generating broadly tunable, broadband pulses in the midinfrared. The method is based on mixing ~30fs pulses at 1.8pm with narrowband pulses tuned through 2.0-4.0pm in GaSe crystal. Output pulses with FWHM bandwidths of 171-665cm-1 are produced in the range from 3 pm to over 11pm. We demonstrate MIR power up to >200mW at 4.7 pm, using a compact 1.7mJ, 10kHz pump laser. The setup could be readily adapted to a wide variety of Yb-doped lasers already present in many research labs.

© 2020 The Author(s)

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