Fabrication Tapered Nano Fiber Optics

Nanofiber is characterized by thin, long, and very soft silica. Taper fibers are made using an easy and low cost chemical method. Etching is conducted with a HF solution to remove cladding and then a low molarity. HF solution to reduce the fiber core diameter. One approach to on-line monitoring of the etching process uses spectrophotometer with a white light source. This method aims to determine the diameter of the reduced core and show the evolution of the two different processes from the nanofiber regime to the fixed regime in which the mode was remote from the surrounding evanescent field, intensity can propagate outside the segment fiber when the core diameter is less than 170 nm. In this work, a simple, intensity-modulated, fiber optic sugar sensor determines the change in the refractive index and concentration of the liquid. Afterwards, an experiment is conducted using two methods to measure the concentration of the liquid; the first utilizes cell cavity and the other, thinoptical fiber sensors and spectra photonics.