The Effect of Polymerization of 2.7-Divinylcarbazole-Benzo-Bis-Thiadiazole on Optical Fiber Properties

Abstract

The interest of polymer optical fibers (POF) lies in their low cost compared to silica fibers and in their ease of implementation, i.e. robustness, flexibility, low weight and easier connectivity. The first generation of polymer fibers are of the index jump type and are composed of polymethyl methacrylate (PMMA) for the core and a fluorinated polymer for the cladding. The significant attenuation of OPFs in the red and near IR is due to the harmonics of the different vibrational modes of the C–H bonds. The improvement of this parameter requires a shift in the transmission of the polymer towards longer wavelengths. As in the case of inorganic glasses, this requires the development of materials with low fundamental frequency of vibration. The development of graded index structures also allows limiting the modal dispersion inherent to the multi-mode character of POFs. And before the use of certain materials in the electronic fields a study of certain properties was carried out by the DFT method in order to propose the polymers based on carbazole. This study was carried out by the DFT–B3LYP method as functional with the 6-31G (d, p) atomic base to optimize all systems, from monomer to pentamer.