Tm-doped fused silica fibers allow for the efficient, linear amplification of broad spectra in the 1.9 µm wavelength region. The single-channel fiber chirped pulse amplification system presented herein delivers a pulse-peak power of >5 GW and a nearly transform-limited pulse duration of 90 fs at 10 kHz repetition rate. An increase of the repetition rate to 100 kHz allowed for unprecedented 45 W average power and >4 GW peak power in this wavelength regime.

© 2017 Optical Society of America

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