Stokes parameters of polarized field
G = stokes(fv)
the four Stokes parameters
G = stokes(
a polarized field or set of fields specified in
The field should be expressed in terms of linear polarization components.
The expression of a field in terms of a two-row vector of linear
polarization components is called the Jones vector formalism.
Create a left circularly-polarized field. Convert it to a linear representation and compute the Stokes vector.
cfv = [2;0]; fv = circpol2pol(cfv); G = stokes(fv)
G = 4×1 4.0000 0 0 4.0000
Display points on the Poincare sphere for a left circularly-polarized field and a 45° linear polarized field.
fv = [sqrt(2)/2, 1; sqrt(2)/2*1i, 1]; G = stokes(fv)
G = 4×2 1.0000 2.0000 0 0 0 2.0000 1.0000 0
The point at the north pole represents the left circularly-polarized field. The point on the equator represents the 45° linear polarized field.
fv— Field vector in linear polarization representation or linear polarization ratio
Field vector in its linear polarization representation specified
as a 2-by-N complex-valued matrix or in its linear
polarization ratio representation specified as a 1-by-N complex-valued
row vector. If
fv is a matrix, each column of
a field in the form
its horizontal and vertical linear polarization components. The expression
of a field in terms of a two-row vector of linear polarization components
is called the Jones vector formalism. If
a vector, each entry in
fv is contains the polarization
Example: [sqrt(2)/2*1i; 1]
Complex Number Support: Yes
G— Stokes parameters
G contains the four Stokes parameters for
each polarized field specified in
fv. The Stokes
parameters are computed from combinations of intensities of the field:
G0 describes the total intensity of the field.
G1 describes the preponderance of horizontal linear polarization intensity over vertical linear polarization intensity.
G2 describes the preponderance of +45° linear polarization intensity over -45° linear polarization intensity.
G3 describes the preponderance of right circular polarization intensity over left circular polarization intensity.
 Mott, H., Antennas for Radar and Communications, John Wiley & Sons, 1992.
 Jackson, J.D. , Classical Electrodynamics, 3rd Edition, John Wiley & Sons, 1998, pp. 299–302.
 Born, M. and E. Wolf, Principles of Optics, 7th Edition, Cambridge: Cambridge University Press, 1999, pp 25–32.
Usage notes and limitations:
Does not support variable-size inputs.
Supported only when output arguments are specified.