Abstract

Using phase shaping, the impact of the Kerr effect in a fiber-based chirped-pulse amplification (CPA) system is experimentally controlled. The technique is based on an analytical model describing the spectral phase owing to self-phase modulation in CPA systems. The method relies neither on complex phase measurements nor on time-consuming optimization routines. Nearly transform-limited pulses with energies as high as $1\mathrm{mJ}$ are produced, and a B integral being as high as $8\mathrm{rad}$ is accumulated in the main amplifier. The value of the B integral is determined by the method itself.

© 2009 Optical Society of America

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