Modal dispersion VS core index

Imports

from PyFiberModes import HE11, HE22, LP01, LP11, LP02, LP21, LP12, TE01, LP31, LP22, LP41
from PyFiberModes.fiber import load_fiber

Generating the fiber structures

Here we create the different fiber design that we want to explore

smf28 = load_fiber(fiber_name='SMF28', wavelength=1310e-9)


smf28.print_data(
    data_type_list=['mode_cutoff_wavelength', 'effective_index', 'dispersion'],
    mode_list=[HE11, LP01, TE01, LP11, LP02, LP21, LP12, HE22, LP31, LP22, LP41]
)


# -

mode_cutoff_wavelength @ wavelength: 1.31e-06:
 -----------------------------------------------
mode = HE11      mode_cutoff_wavelength: inf
mode = LP01      mode_cutoff_wavelength: inf
mode = TE01      mode_cutoff_wavelength: 1.4997130892840177e-06
mode = LP11      mode_cutoff_wavelength: 1.4997130892840177e-06
mode = LP02      mode_cutoff_wavelength: 9.412382876877604e-07
mode = LP21      mode_cutoff_wavelength: 9.412382876877604e-07
mode = LP12      mode_cutoff_wavelength: 6.533509661032724e-07
mode = HE22      mode_cutoff_wavelength: 6.531503532628028e-07
mode = LP31      mode_cutoff_wavelength: 7.022612167231315e-07
mode = LP22      mode_cutoff_wavelength: 5.14076517910921e-07
mode = LP41      mode_cutoff_wavelength: 5.652753684236695e-07



effective_index @ wavelength: 1.31e-06:
 ----------------------------------------
mode = HE11      effective_index: 1.4509073523458274
mode = LP01      effective_index: 1.4509131222977205
mode = TE01      effective_index: 1.447470263696458
mode = LP11      effective_index: 1.447470263696458
mode = LP02      effective_index: nan
mode = LP21      effective_index: nan
mode = LP12      effective_index: nan
mode = HE22      effective_index: nan
mode = LP31      effective_index: nan
mode = LP22      effective_index: nan
mode = LP41      effective_index: nan



dispersion @ wavelength: 1.31e-06:
 -----------------------------------
mode = HE11      dispersion: 1.1399738885603026
mode = LP01      dispersion: -1.0354515265649626
mode = TE01      dispersion: -33.95106566984884
mode = LP11      dispersion: -33.95106566984884
mode = LP02      dispersion: nan
mode = LP21      dispersion: nan
mode = LP12      dispersion: nan
mode = HE22      dispersion: nan
mode = LP31      dispersion: nan
mode = LP22      dispersion: nan
mode = LP41      dispersion: nan