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Nonlinear Optics and Photonics$
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Guang S. He

Print publication date: 2014

Print ISBN-13: 9780198702764

Published to Oxford Scholarship Online: December 2014

DOI: 10.1093/acprof:oso/9780198702764.001.0001

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Third-Order Nonlinear (Four-Wave) Frequency Mixing

Third-Order Nonlinear (Four-Wave) Frequency Mixing

(p.59) 4 Third-Order Nonlinear (Four-Wave) Frequency Mixing
Nonlinear Optics and Photonics

Guang S. He

Oxford University Press

Coherent light emission with new frequencies can be generated upon the action of three incident coherent waves in a third-order nonlinear optical medium. This is the so-called four-wave frequency mixing (FWFM) effect or equivalently the four-photon parametric interaction effect, which can take place in any type of transparent nonlinear media, including centrosymmetric or isotropic materials. The effective occurrence of this effect requires that the phase-matching condition must be fulfilled. FWFM is a very useful physical approach to produce laser frequency conversion or frequency variable coherent emission in third-order nonlinear materials. In addition, some types of FWFM processes may also lead to an induced refractive-index change.

Keywords:   Four-wave frequency mixing, four-photon parametric interaction, phase-matching condition, third-order nonlinear medium, coherent light emission, laser frequency conversion, induced refractive-index change

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