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1 kW, 10 mJ, 120 fs coherently combined fiber CPA laser system

: Stark, H.; Buldt, J.; Müller, M.; Klenke, A.; Limpert, J.

Fulltext ()

Optics Letters 46 (2021), No.5, pp.969-972
ISSN: 0146-9592
ISSN: 1539-4794
Journal Article, Electronic Publication
Fraunhofer IOF ()

An ultrafast fiber chirped-pulse amplification laser system based on a coherent combination of 16 ytterbium-doped rod-type amplifiers is presented. It generates 10 mJ pulse energy at 1 kW average power and 120 fs pulse duration. A partially helium-protected, two-staged chirped-pulse amplification grating compressor is implemented to maintain the close to diffraction-limited beam quality by avoiding nonlinear absorption in air.