SFG (Sum Frequency Generation) | Raicol

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SFG (Sum Frequency Generation)

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Sum-frequency generation (SFG) is a non-linear optical process.

This phenomenon is based on the annihilation of two input photons at angular frequencies $\omega_1$ and $\omega_2$ while, simultaneously, one photon at frequency $\omega_3$ is generated. As with any phenomenon in nonlinear optics, this can only occur under conditions where:

The light is interacting with matter;
The light has a very high intensity (typically from a pulsed laser).

Sum-frequency generation is a “parametric process”, meaning that the photons satisfy energy conservation, leaving the matter unchanged:

A special case of sum-frequency generation is second-harmonic generation

Raicol Crystals provides the following types of crystals for SFG applications:

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