Dispersion Engineering of Highly Nonlinear Chalcogenide Suspended-Core Fibers


Chalcogenide optical fibers are currently undergoing intensive investigation with the aim of exploiting the wonderful glass transmission and nonlinear characteristics in the close to- and mid-infrared for many applications. Additional enhancement of those properties can be obtained, for a explicit application, with optical fibers specifically designed that are capable of providing low effective space together with a properly tailored dispersion, matching the characteristics of the laser sources used to excite nonlinear effects. Suspended-core photonic crystal fibers are ideal candidates for nonlinear applications, providing little-core waveguides with massive index contrast and tunable dispersion. In this paper, the dispersion properties of As2S3 suspended-core fibers are numerically analyzed, taking under consideration, for the primary time, all the structural parameters, including the dimensions and the amount of the glass bridges. The results show that a proper style of the cladding struts will be exploited to significantly modification the fiber properties, altering the utmost worth of the dispersion parameter and shifting the zero-dispersion wavelengths over a vary of four hundred nm.

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