Abstract
The recent developments on chalcogenide glass hollow core microstructured optical fibers (HC-MOFs) are presented. The comparative analysis of simulated optical properties for chalcogenide HC-MOFs of negative-curvature with different size and number of capillaries is given. The technique for the manufacture of microstructured chalcogenide preforms, which includes the assembly of the substrate glass tube and 8-10 capillaries, is described. Further trends to improve the optical transmission in chalcogenide NCHCFs are considered.
Highlights
The prepared NCHCFs of chalcogenide glass were suitable for the mid-IR radiation transmission, the optical losses were higher than the theoretically predicted level
To prepare the hollow-core microstructured fibers with low optical losses in the mid-IR range, further optimization of their design and fiber drawing conditions is required to prevent the deformation of their photonic crystal structure, which is one of the reasons for the increase in optical losses
Preparation of chalcogenide glass capillaries by extrusion from a double crucible, in contrast to commonly used capillary drawing of a tubular preform, eliminates the additional step of heat treatment of the sample to reduce the crystallization and to obtain the smooth outer and inner surfaces of the capillaries
Summary
The hollow-core microstructured optical fibers (HC-MOFs) (Yablonovitch, 1987; Knight et al, 1996) have attracted much attention in optical applications over the past decade as they exhibit many unique optical properties such as controlled dispersion, endlessly single-mode operation, supercontinuum generation, and soliton propagation (Birks et al, 1997; Monro et al, 1999; Revathi et al, 2014; Skryabin and Wadsworth, 2010; Wadsworth et al, 2001) over a wide range of wavelengths that cannot be realized in conventional step-index fibers.
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