Guided modes and loss in a plasma-filled Bragg waveguide

Abstract

The dispersion and radiation loss of propagating modes in a plasma-filled Bragg waveguide are investigated. The Bragg waveguide at a center frequency of 10 GHz is modeled with the transfer-matrix method, which has been used to analyze optical Bragg fibers. We calculate the dispersion and radiation loss of the TE 01 , TM 01 , and HE 11 modes and show how they vary as a function of plasma density. As the plasma density inside the waveguide increases, the cutoff frequency of each mode increases. An increase in plasma density increases the radiation loss in the TE 01 mode while it decreases the radiation loss in the TM 01 mode; the effect on the HE 11 mode is to increase the radiation loss for frequencies above 10.2 GHz and decrease the radiation loss for frequencies below 10.2 GHz.

Nonlinear Double-Layer Bragg Waveguide: Analytical and Numerical Approaches to Investigate Waveguiding Problem

“…Here, we are going to demonstrate this numerical approach for special waveguiding problem. As Bragg (or multilayered) waveguides have application (see, e.g., [14,15]), we demonstrate here that the approach from [13] can be easily extended to be applied to more complicated problems. In order to justify the analytical approach given here, we will widely use the results of the paper [13].…”

“…Let us formulate the transmission eigenvalue problem (problem ) to which the problem of surface waves propagating in a cylindrical waveguide has been reduced. The goal is to find quantities such that, for given 1 ̸ = 0 (or 2 ̸ = 0), there is a nonzero function ( ; ) that is defined by formulas (12) and (13) for < 1 and > 2 , respectively, and solves equation (11) for 1 < < 2 ; moreover, the function ( ; ) thus defined satisfies conditions (8) and transmission conditions (14).…”

Effect of plasma on modal dispersion characteristics of elliptical Bragg waveguide

“…4 which shows the variation of w w p vs. the cut−off frequency V c . By comparing Table 3 with Table 1 and Table 2, we can assign the various linearly polarized modes [30] and it is seen that variation of LP 11 , LP 12 , LP 13 , LP 14 , LP 15 etc. remains constant.…”

“…In recent years, these dielectric waveguides have attracted great attention because of its marvellous propagation properties for optical communication. As a new type of waveguide, the plasma filled waveguide has also attracted a great deal of interest [13]. Electromagnetic wave propagation in plasma was extensively studied in the 1950s and 1960s.…”

“…Many schol− ars have been investigating it, but their studies are mainly connected with waveguide having central core region filled with plasma [18][19][20][21][22]. Very recently Chatterton et al [13] and Singh et al [23] have studied electromagnetic waves in a circular Bragg waveguide having plasma in the cladding regions. Unfortunately, most investigations are obstructed by the mode instability of the lobe orientations in a circular− −core waveguide [24].…”