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Plasma-breakdown retropulse isolators for the infrared

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Abstract

The design and performance of a passive plasma isolator for suppressing retropulses in high-power CO2 laser-fusion systems are described. The device uses a gas-filled spatial filter designed to produce a plasma at the focal plane iris. General design criteria for these isolators are discussed, and the performance of a specific isolator is evaluated. For the unit tested, retropulse attenuations of 33 dB for focal plane intensities of 1.5 TW/cm2 have been demonstrated.

© 1981 Optical Society of America

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