Detection of Trace Molecular Species Using Degenerate Four-Wave Mixing

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Science  25 Sep 1992:
Vol. 257, Issue 5078, pp. 1894-1900
DOI: 10.1126/science.257.5078.1894


Spectroscopies that make use of laser light have provided an important tool to modern researchers for the nonintrusive analysis of chemical systems. The strengths and limitations of these spectroscopic techniques often determine the viability of scientific investigations. The unique properties of degenerate four-wave mixing, a nonlinear optical technique, have recently been found to provide powerful capabilities for a wide range of applications.