Elliptical polarization is a type of polarization in which the tip of the electric field vector traces out an ellipse as a function of time. It is a combination of linear and circular polarizations.
Elliptical polarization can occur when a wave passes through a medium that causes a phase shift between the orthogonal components of the electric field.
There are two main components of elliptically polarized light: the major axis, which represents the maximum and minimum amplitudes of the electric field, and the minor axis, which represents the phase difference between the orthogonal components of the electric field.
There are two types of elliptical polarization: right-handed and left-handed. These terms refer to the direction in which the electric field vector rotates as the wave travels.
Elliptical polarization is commonly used in the field of optical communications, such as in the transmission of data through fiber optic cables, as well as in various imaging techniques.