Visualization of expanding laser-ablation plume by a proposed frequency up-converted infrared spectroscopic imaging


Observing temporal and spatial distribution of infrared (IR) radiation is restricted by the lack of a fast-gated IR detector. To overcome this problem, frequency up-conversion detection of IR radiation in a nonlinear crystal has been developed by several investigators. We have proposed the frequency up-conversion imaging of an IR degenerate four-wave mixing… (More)


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