Abstract

Degenerate four-wave mixing (DFWM) has been investigated experimentally and theoretically for a variety of nonlinear media. It is an interesting technique for many research-oriented and technological applications, such as measuring species concentration in combusting and noncombusting media. Since only one tunable laser is needed, the technique has been demonstrated to be much less complicated than, for example, coherent anti-Stokes Raman spectroscopy (CARS). Considerable interest in the use of DFWM for optical spectroscopy is due to the Doppler-free nature of this nonlinear process.

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