Optical parametric amplification and oscillation: the basics
Optical parametric sources Basics, implementation and applications

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E6445 V1 Article

Optical parametric amplification and oscillation: the basics
Optical parametric sources Basics, implementation and applications

Authors : Jean-Baptiste DHERBECOURT, Antoine GODARD, Jean-Michel MELKONIAN, Myriam RAYBAUT

Review date: September 30, 2026 | Lire en français

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1. Optical parametric amplification and oscillation: the basics

1.1 Quadratic nonlinear optics

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1.1.1 Non-linear susceptibility and polarization

When a dielectric medium is illuminated by an intense optical wave, such as that emitted by a laser, the displacement of electrons under the effect of this applied field becomes anharmonic [E 1 965]. Consequently, the polarization vector P of the set of dipoles in the optical medium is expressed as a power development of the applied electric field E :

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