Proceedings PaperTheoretical and numerical modeling of short-pulse amplification in a high-power iodine laser
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Numerical modeling of short pulse amplification in iodine laser requires a detailed enough theoretical model. This model must include: effects of deep gain saturation (gain cross section is high, (sigma) > 10-19 cm2, so in the great part of the amplifier chain (epsilon) pulse > (epsilon) sat); effects of finite gain bandwidth which are comparable with the pulse bandwidth; a complex structure of atomic iodine transition which consists of 6 components of hyperfine structure (HFS) and 36 sublevels of Zeeman structure (ZS); pulse deformations caused by passive shutters; transverse inhomogeneities of beam and amplifier characteristics. All these factors cannot be taken into account simultaneously. So we have developed a series of codes which model different aspects of pulse amplification in more or less detail.