Abstract
Present ps-pulse optical-free-induction-decay (OFID) CO2 laser systems[1] produce highpower 10 μm pulses with an excellent contrast ratio and adjustable duration between 30 μs and 300 μs.[2] All these systems apply OFID in hot CO2 gas as optical filter in spite of the fact that the Michelson interferometer, the Fabry-Perot etalon, the grating monochromator, the quarterwave antireflection coating used in reflection and resonant absorbers have been proposed for this purpose.[1] Obviously, none of these was successful.
© 1992 IQEC
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