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Recent experiments using high current capacitor discharges have produced high power laser action in multiply ionized xenon. Strongest oscillation was found on five simultaneous transitions in the green. These lines had a total peak power of 1.4 kW. In addition, streak camera pictures have shown that the onset of laser action begins and is sustained during the interval of time when the plasma is being compressed (``pinched'') by its self-electromagnetic forces.

Small−bore capillary tubes exhibit very high optical gains and saturation intensities in flowing gas CO2 systems. However, these parameters may vary greatly in the axial direction due to the nonuniform axial pressure distribution. Use of porous−wall BeO capillary tubes makes it possible to attain a more uniform pressure distribution and to usefully scale capillary waveguide amplifiers to longer lengths.

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