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four wave mixing (FWM)

Four wave mixing (FWM) is a technique used to amplify optical signals. In this process, three light signals interact with each other: one signal beam and two pump beams.

Principle of Four Wave Mixing

Principle of Four Wave Mixing

Four-wave mixing is implemented in Optical Parametric Amplifiers( OPA) and is based on four optical waves interacting with each other in the nonlinearities of a crystal or optical fiber. Two beams, a signal beam and a pump beam, create a virtual image that is read out by a second pump beam. The energy of the second pump beam is reflected as a fourth wave in the direction of the signal beam. The method, which uses a nonlinear Kerr effect, is used in optical networks in Dense Wavelength Division Multiplexing( DWDM).

Englisch: four wave mixing - FWM
Updated at: 29.07.2020
#Words: 122
Links: indium (In), process, light, signal, beam
Translations: DE

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