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Depressed cladding waveguide cutoff

 
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MessagePosté le: Sam 10 Mar - 05:03 (2018)    Sujet du message: Depressed cladding waveguide cutoff Répondre en citant

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viously known effects of depressed cladding, such as nonzero cutoff of the fundamental mode, are derived in a new way from the underlying model, and a new phenomenon concerning behavior of the propagation constant at the onset of nonzero cutoff is identified. 1. INTRODUCTION. Waveguide modes are generally
The angles corresponds to waveguide modes in wave optics. • For thin Planar Waveguides x y z ns nc n1. Core. Substrate. Cover. • Core film sandwiched between two layers of lower refractive index. • Bottom layer is often a substrate with n = ns. • Top layer is called Raised or depressed cladding for dispersion control.
use as lasers and routing waveguides. The results show that if the confinement factor, or mode size, is the criterion for comparison, there is little difference between the standard and depressed cladding cases for guides which are near the cutoff of the higher order modes. The primary difference is in the fraction of the mode
A method was developed for calculating the effective cutoff length, the size of a mode spot, and the chromatic dispersion over the profile of the refractive index (measured in the preform stage) of single-mode fiber waveguides with a depressed cladding. The results of such calculations are shown to agree with the results of
Abstract. An analysis is given for the way in which leaky modes of an open planar symmetric waveguide with depressed cladding migrate as the frequency increases into bound propagating modes. For simple step profiles it is well known that leaky modes start from complex waves, evolve through a nonphysical transition as
21 Dec 2017 Request (PDF) | Effect of cladding l | In this paper, the analytical study of the modal characteristics, cutoff condition and dispersion curves of circular optical waveguide having various cladding layers are presented. The proposed three structures of waveguide have three parts namely core with highest
Abstract. We present an analysis of propagation along practical, single-mode, matched-cladding and depressed-cladding slab waveguides and fibres us- ing the bound modes of the entire core-cladding-coating-air cross-section, instead of the usual bound-radiation mode model of a finite core and un- bounded cladding.
A tapered fiber with a depressed-index outer ring is fabricated and dispersion engineered to generate a widely tunable higher cutoff slope is achieved with a larger cross angle between the two refractive index dispersion curves of the tapered fiber . F-doped outer cladding starts to affect waveguide dis- persion when it is
The results show that if the confinement factor, or mode size, is the criterion for comparison, there is little difference between the standard and depressed cladding cases for guides which are near the cutoff of the higher order modes. The primary difference is in the fraction of the mode which overlaps the cladding regions,

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