Contrast degradation in a chirped-pulse amplifier due to generation of prepulses by postpulses | Zendy

N.V. Didenko | Zendy; A. V. Konyashchenko | Zendy; A. P. Lutsenko | Zendy; S Yu Tenyakov | Zendy

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Contrast degradation in a chirped-pulse amplifier due to generation of prepulses by postpulses

Author(s) -

N.V. Didenko,

A. V. Konyashchenko,

A. P. Lutsenko,

S Yu Tenyakov

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.003178

Subject(s) - optics , amplifier , regenerative amplification , chirp , pulse (music) , chirped pulse amplification , femtosecond pulse shaping , materials science , ultrashort pulse , self phase modulation , bandwidth limited pulse , pulse compression , nonlinear optics , laser , physics , optical amplifier , optoelectronics , telecommunications , radar , cmos , detector , computer science

Experiment and modeling show that the refractive index nonlinearity can significantly degrade the contrast of a chirped-pulse amplifier seeded with a pulse and a single postpulse. Multiple powerful non-equidistant pre- and postpulses are generated. For a Gaussian pulse and a hat-top beam, an incident postpulse of energy W results in a prepulse of energy 0.58B(2)W, where B is the nonlinear phase (B-integral) of the main pulse. Calculations show that level of satellites due to gain saturation is negligibly small. Experimental results for Ti:Sapphire regenerative and multipass amplifiers and prepulse generation in fused silica agree well with the theory.

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