FF_irradiance_x

ofiber.cylinder_step.FF_irradiance_x(r, theta, phi, ell, lambda0, a, V, b)

Normalized far-field irradiance polarized in the x-direction.

This calculation is based eqn 10.12 for the far-field from Chen, Foundations for Guided-Wave Optics, Wiley-Interscience, 2007.

The magnitude of the field is squared and normalized by the square of the electric field magnitude.

Parameters:

• r – radial distance from the fiber axis (microns).

• theta – polar angle in radians.

• phi – azimuthal angle in radians.

• ell – azimuthal mode number.

• lambda0 – wavelength of light in the medium (microns).

• a – Radius of the fiber core (microns).

• V – normalized frequency parameter of the fiber.

• b – normalized propagation constant.

Returns:

The irradiance pattern as a function of r, theta, and phi.