The Laser Induced Medium Perturbation (LIMP) effect is shown to be a volumetric effect which plays a significant role in the beam quality obtainable from a CO2 laser employing a continuously coupled unstable resonator.
The effect on the output of an electron beam sustained CO2 laser due to LIMP (laser induced medium perturbation) is examined. An approximate theory is developed which leads to basic agreement with the experimental observations of beam spreading and temporal pulse structure.
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