Dispersion Behavior of Gold-Nanocoated Dielectric Optical Fibers

Abstract

Using a fairly rigorous approach, gold-nanocoated dielectric optical fibers are treated to evaluate the propagation characteristics corresponding to the transverse electric (TE) and hybrid EH modes, as supported by the guides with small and large dimensions. Situations with varying nanocoating thickness are considered for two different operating wavelengths. The results demonstrate a profound effect of the gold nanocoating on the propagation-related features—the number of existing modes decreases with increasing nanolayer thickness. Furthermore, the gold nanolayer also has effects on the modal propagation constants, which become more prominent with the increase in the order of modes. It has been found that, in fiber with smaller dimension, the EH11mode hardly exhibits any effect due to the variation in existing nanolayer coating corresponding to 850 nm wavelength. Almost similar situations are observed for the TE01mode in large core fiber operating at 1550 nm wavelength.

On the sustainment of optical power in twisted clad dielectric cylindrical fibers

“…[1][2][3][4][5] There are several forms of complex waveguides wherein the complexities may appear either in the geometry or the materials which they are constructed of. As the transmission properties of optical waveguides essentially depend on the cross-sectional geometry [6,7] and the nature of materials [8][9][10] in the guide, lightwave propagation through varieties of guides (with varying cross-sections as well as materials that include metamaterials [11][12][13]) has been greatly dealt with in the literature.…”

Effects on the Energy Flux Density Due to Pitch in Twisted Clad Optical Fibers

“…During the last couple of decades, considerable amount of investigations have been reported, by taking into account varieties of guides with different structures and compositions [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Within the context, twisted clad optical fiber is of special type in which the fiber core is bounded with conducting helical windings [18][19][20].…”