numerical_aperture_graded_index

ofiber.basics.numerical_aperture_graded_index(n_core, n_clad, q, r_over_a)[source]

Calculate the numerical aperture of a graded-index optical fiber.

The numerical aperture varies across the face of a graded-index fiber. This give the result at the fractional distance across the fiber core.

Parameters:

  • n_core – the index of refraction of the fiber core [-]

  • n_clad – the index of refraction of the fiber cladding [-]

  • q – parameter for graded index fiber [-]

  • r_over_a – ratio of radius to the core radius [-]

Returns:

numerical aperture at r_over_a [-]