A laser plasma isolator was developed to attenuate a retropulse in a high-power CO2 laser system. An attenuation ratio of 1/20 of a main laser beam (∼1-J 3-nsec pulse-width FWHM) was obtained by blowing off a carbon plasma induced by a plasma production laser beam (∼0.5-J 3-nsec pulse-width FWHM) onto the waist of the main laser beam.
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Kawamura et al. (1978) studied this question.
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