Abstract
Hollow-core optical fiber with eight-pointed star cladding structure for low-loss transmission in telecom bands
Highlights
Hollow-core photonic crystal fibers (HC-PCF, shortened as HCF in this work) were first proposed at the edge of the new millennia and rapidly attracted attention due to their extraordinary optical guidance properties [1, 2]
HCFs are capable of guiding light through the hollow-core by means of the microstructured cladding that is composed of holes and glass struts
The guidance mechanism of the negative curvature hollow-core fibers (NC-HCFs) is based on inhibited coupling, and light is confined in the hollowcore by the low spatial overlap of core and cladding modes and strong phase mismatch between these modes [24]
Summary
Hollow-core photonic crystal fibers (HC-PCF, shortened as HCF in this work) were first proposed at the edge of the new millennia and rapidly attracted attention due to their extraordinary optical guidance properties [1, 2]. A new group of HCF, negative curvature hollow-core fibers (NC-HCFs) have recently achieved to have lower losses than the silica in the visible range and this promising result makes the NC-HCF one of the strongest candidates to break the Rayleigh limit in the near-IR region as well [7, 8]. Several studies have proposed novel designs of low-loss NC-HCF for the near-IR with various cladding elements such as Kagome [9], circular tubes [10, 11], nested tubes [12], conjoined tubes [13], elliptical tubes [14, 15], lotus-shaped tubes [16], extended tubes [17], ”ice cream cone” tubes [18], positively-negatively curved bars within tubes [19] and hybrid Kagome-tubular [20]. This work proposes a novel HCF design with interlaced squares cladding structure for low-loss transmission in the near-IR region. The proposed design will be an important step for the generation low-loss telecom fibers
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