Semi-analytical model for hollow-core anti-resonant fibers

Abstract

We detailedly describe a recently-developed semi-analytical method to quantitatively calculate light transmission properties of hollow-core anti-resonant fibers (HC-ARFs). Formation of equiphase interface at fiber's outermost boundary and outward light emission ruled by Helmholtz equation in fiber's transverse plane constitute the basis of this method. Our semi-analytical calculation results agree well with those of precise simulations and clarify the light leakage dependences on azimuthal angle, geometrical shape and polarization. Using this method, we show investigations on HC-ARFs having various core shapes (e.g., polygon, hypocycloid) with single-and multi-layered core-surrounds. The polarization properties of ARFs are also studied. Our semi-analytical method provides clear physical insights into the light guidance in ARF and can play as a fast and useful design aid for better ARFs.

Impact of core-cladding boundary shape on the waveguide properties of hollow core microstructured fibers

“…The fundamental mode of thecircular dielectric tube has a maximal value of confinement loss( Fig. 1), which is consistent with the conclusions drawn in [18]. Moreover, it can be noted that all curves in Fig.…”

Confinement loss in hollow-core negative curvature fiber: A multi-layered model

“…By integrating all the outwardly-propagating beams in the transverse plane, fiber's attenuation coefficient can be inferred. In our previous work [40,41], we have pointed out that if one chooses an equiphase closed loop in the outermost medium as the path of integration and acquires the electromagnetic fields on it, the radiation intensities in all the radial directions could be derived by utilizing Green's theorem [49]. Fig.…”

“…Considerable theoretical efforts have been devoted to study the optical effects occurring in ARF, such as capillary/Bragg fiber theory [34,35], anti-resonant reflecting optical waveguide (ARROW) model [36], DOS calculation [3], inhibited coupling analogy [37], tube lattice fiber model [38] and concentric rings model [39][40][41][42][43]. These models are able to predict the high and low loss spectral regions, the dispersion curves, the conditions for single modeness, and the bending loss performances [44].…”

Giant Enhancement of Raman Scattering by a Hollow-Core Microstructured Optical Fiber Allows Single Exosome Probing

“…A striking feature of HcARFs is the strict light confinement in the fiber core due to the unusual light transmission mechanisms. 27 In addition, the specially designed microstructure also enables light to be propagated at very low transmission loss, 25,28 in clear contrast to free space transmission. The overall effects ensure strong light-matter interaction in the core region.…”