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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 5,
  • Issue S1,
  • pp. S190-S193
  • (2007)

Influence of medium-high frequency phase aberrations on 3'omega' focal spot in frequency tripling

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Abstract

Quantitative analysis of frequency tripling based on the transform of phase aberrations is presented to study the influence of medium-high phase errors on focal spot tails. Nine-fold increase of energy fraction of high-order spectrum caused by the noises in the "waviness-1" regime would result in power growth of 3'omega' tails and significantly enlarge the spot size from 1'omega' to 3'omega' laser. The power growth in "waviness-1-2" regime (0.1-0.4 mm^(-1)) is with main responsibility for the increment of 3'omega' spot tails, as noises in whole "waviness-1" portion answer for the growth of 1'omega' spot tails. Theoretical predictions are shown to be consistent with numerical simulations on focal spot with variant phase ripples and different B-integral values.

© 2007 Chinese Optics Letters

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