Interplay of nonlinearity and gain shaping in femtosecond fiber amplifiers

Abstract

A study of chirped-pulse amplification in the presence of large nonlinear phase shifts (as large as $\sim 12\pi$) and finite gain bandwidth is presented. Numerical simulations that include the effect of nonlinearity, group-velocity dispersion, higher-order dispersion, and finite gain bandwidth predict the spectral signature of the interplay of nonlinearity with gain shaping. Experimental results obtained for up to $\sim 0.4\mu \mathrm{J}$ pulse energies from a Yb fiber amplifier agree with the numerical calculations.

© 2006 Optical Society of America

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