High-average-power picosecond Yb-doped fiber amplifier.
We report on a cladding-pumped, ytterbium-doped large-core-area fiber amplifier that is capable of generating 51.2 W of average power at a 1064-nm center wavelength, an 80-MHz repetition rate, and a 10-ps pulse duration. In an ytterbium-doped large-mode-area fiber these pulses could be amplified up to 43.2 W with diffraction-limited beam quality (M(2)~1.3) . Power scaling limitations that arise from nonlinear distortions such as self-phase modulation and stimulated Raman scattering are discussed.
Limpert
J
J
Liem
A
A
Gabler
T
T
Zellmer
H
H
Tünnermann
A
A
Unger
S
S
Jetschke
S
S
Müller
H R
HR