Abstract
The extension of the signal bandwidth of the amplified pulse is a key option to increase the peak-power from Yb-doped fiber CPA-systems. We analyze the spectral gain characteristics of state-of-the-art Yb-doped fiber amplifiers with regard to the broadest gain-bandwidth. While for input pulses with bandwidths < 5 nm a spectral center around 1035 nm is beneficial, longer central wavelengths (~ 1055 nm) are advantageous for broader signal bandwidths (~ 10 nm). It is shown that this spectral management is valid even if the impact of self-phase modulation is considered. The interplay of saturation-induced pulse-distortion and the spectral behavior of the gain are also discussed.
© 2010 Optical Society of America
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