Abstract
Efficient second-harmonic generation (SHG) and third-harmonic generation of a repetitively pulsed CO2 laser can provide a new source of mid-IR radiation for lidar applications. An efficient harmonic generation of CO2 laser using AgGaSe2 or Tl3AsSe3 crystal with the a large nonlinear susceptibility is currently being studied. But high-power operation is limited by the low damage threshold of these ternary chalcopyrite nonlinear crystals, which more strongly depends on the fluence of radiated laser pulse than its peak power.
© 1995 Optical Society of America
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