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Phase Modulators

Definition: devices for manipulating the phase of a laser beam

German: Phasenmodulatoren

Category: photonic devices

How to cite the article; suggest additional literature

A phase modulator is an optical modulator which can be used to control the optical phase of a laser beam.

Frequently used types of phase modulators are electro-optic modulators based on Pockels cells, and liquid crystal modulators, but it is also possible e.g. to exploit thermally induced refractive index changes or length changes e.g. of an optical fiber, or induce length changes by stretching. Various kinds of phase modulators are used within the area of integrated optics, where the modulated light propagates in waveguides.

Important properties of phase modulators are:

For different types of phase modulators, such properties vary in huge ranges. Therefore, different kinds of phase modulators are appropriate for different applications.

Applications

Some examples of applications of phase modulators are:

See also: optical phase, optical modulators, electro-optic modulators, integrated optics
and other articles in the category photonic devices

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