Frequency Doubling and Mixing

Authored by: Richard L. Sutherland

Encyclopedia of Optical and Photonic Engineering

Print publication date:  September  2015
Online publication date:  September  2015

Print ISBN: 9781439850978
eBook ISBN: 9781351247184
Adobe ISBN:


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Second-order nonlinear optics forms a foundation for generating new coherent sources of light in a broad spectrum of wavelengths by the processes of frequency doubling and mixing. The parametric processes of SHG, SFG, and DFG can be understood as the radiation of coherent light by a nonlinear polarization that oscillates at the second harmonic as well as the sum and difference frequencies of light waves incident on the medium. Frequency doublers and triplers, up-conversion and down-conversion devices, and continuously tunable OPOs have become ubiquitous in optical research laboratories.

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