Luzi, G.; Klapper, V.; Delgado, A. Asymptotic Modeling of Optical Fibres: Annular Capillaries and Microstructured Optical Fibres. Fibers2023, 11, 104.
Luzi, G.; Klapper, V.; Delgado, A. Asymptotic Modeling of Optical Fibres: Annular Capillaries and Microstructured Optical Fibres. Fibers 2023, 11, 104.
Luzi, G.; Klapper, V.; Delgado, A. Asymptotic Modeling of Optical Fibres: Annular Capillaries and Microstructured Optical Fibres. Fibers2023, 11, 104.
Luzi, G.; Klapper, V.; Delgado, A. Asymptotic Modeling of Optical Fibres: Annular Capillaries and Microstructured Optical Fibres. Fibers 2023, 11, 104.
Abstract
Microstructured optical fibres (MOFs) are a new type of optical fibres that possess a wide range of optical properties and many advantages over common optical fibres. Those are provided by unique structures defined by a pattern of periodic or quasi-periodic arrangement of air holes that run through the fibre length. In recent years, MOFs have opened up new possibilities in the field of optics and photonics, enabling the development of advanced devices and novel optical systems for different applications. The key application areas of PCFs vary from telecommunications and high-power energy transmission to quantum optics and sensing. The stack-and-draw method is a standard manufacturing technique for MOFs, where a preform is first manually created and then drawn in a high-tech furnace into a fibre with the required final dimensions and position of the air holes. Since in the manufacturing process experimenters can control only a few parameters, mathematical models and numerical simulations of the drawing process are highly requested. They not only allow to deepen the understanding of physical phenomena occurring during the drawing process, but they also accurately predict the final cross-section shape and size of the fibre. In this manuscript, we assume thermal equilibrium between the furnace and the fibre and propose a functional form of the fibre temperature distribution. We utilise it with asymptotic mass, momentum, and evolution equations for free surfaces already available in the literature to describe the process of fibre drawing. By doing so, the complex heat exchange problem between the fibre and the furnace need not be solved. The numerical results of the whole asymptotic model overall agree well with experimental data available in the literature, both for the case of annular capillaries and for the case of holey fibres.
Keywords
asymptotic analysis; fibre drawing; creeping flow; fibre temperature distribution
Subject
Engineering, Other
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
