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Thulium-doped fiber chirped-pulse amplification system with 2 GW of peak power

: Gaida, C.; Gebhardt, M.; Stutzki, F.; Jauregui, C.; Limpert, J.; Tünnermann, A.


Optics Letters 41 (2016), Nr.17, S.4130-4133
ISSN: 0146-9592
Fraunhofer IOF ()

Thulium-doped fibers with ultra large mode-field areas offer new opportunities for the power scaling of mid-IR ultrashort-pulse laser sources. Here, we present a laser system delivering a pulse-peak power of 2 GW and a nearly transform-limited pulse duration of 200 fs in combination with 28.7 W of average power. This performance level has been achieved by optimizing the pulse shape, reducing the overlap with atmospheric absorption lines, and incorporating a climate chamber to reduce the humidity of the atmospheric environment.