niskostratne mody prowadzone

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Note added at 44 mins (2020-06-29 07:04:38 GMT)
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mod prowadzony / mod związany

bound mode
in an optical fibre, a mode whose field decays monotonically in the transverse direction everywhere external to the core and which does not lose power to radiation

Note 1 – Where the refractive index decreases with distance from the axis and where there is no central refractive index dip a bound mode is one for which :

n(a)k ≤ β ≤ n(0)k

where β is the imaginary part (phase coefficient) of the axial propagation coefficient,
n(a) is the refractive index at r = a, the radius,
n(0) is the refractive index at r = 0,
k is the angular free space wavenumber 2 π/λ and λ is the wavelength.

Note 2 – Bound modes correspond to guided light rays in the terminology of geometric optics.

Note 3 – In a multimode fibre, the power in bound modes is predominantly contained in the core of the fibre.
http://www.electropedia.org/iev/iev.nsf/display?openform&iev...

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Note added at 48 mins (2020-06-29 07:08:14 GMT)
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Dodatkowo, specjalna grupa rdzeniowych, niskostratnych modów prowadzonych istnieje we wszystkich optycznych strukturach periodycznych na granicy ośrodków refrakcyjnych i nazywana jest modami powierzchniowymi.
http://koral.ise.pw.edu.pl/~rrom/kapilary/KapilPW.pdf