UV Transmission Fiber Performance Analysis And Preparation Methods

In this thesis, the Ag/PMMA leak type air core waveguide used in order to transmitultraviolet laser performance analysis and preparation process. The subject study thetransmission wavelength range of the hollow fiber is200-600nm. Through severalexperimental comparison, access to the ideal experimental conditions, to improve thetransmission performance of the transmission fiber.After analysis, we determined that the use of an internal diameter of2mm quartz glasstube as a hollow-core waveguide substrate. Theory and data analysis to determine the useof silver mirror reaction principle quartz glass tube inner wall surface is coated with a layerthickness of0.2μm silver layer. Finally, according to the ultraviolet wavelengths, as wellas the transmittance, it is determined in the surface layer of the silver film deposited60nmthick PMMA as a dielectric film layer. In addition, we experiment and the parameters inthe preparation of silver film and PMMA film in the quartz glass surface to generatesuperior performance film, in a quartz glass tube inner wall surface made of silver-platedmembrane and PMMA dielectric film we use The vertical fiber coating machines,experimental conditions: the dark, the reaction temperature lies in the18degrees CelsiuspH control in the8-9, the catalyst for nitric acid, stabilizer polyethylene glycol4000. In thepreparation of the silver film, by experimental finalize preparation concentration of0.1mol/L of silver the Luohe ion solution, the flow rate through the coating machine is0.3ml/s,for2minutes. When combined in the preparation of PMMA film and silver film, afterexperimental Finally, we use0.4%by mass ratio of PMMA/acetone solution, to controlthe flow rate of0.8ml/s, time is30seconds.Performance testing of the experimental forward pass analysis is a hollow-core opticalfiber as the electric light, through the use of ultraviolet laser convex lens to find settingsprepared, after the difference of the the contrast input and output energy, theoretical calculations can obtain the preparation of optical fiber transmission loss and The curvedtransmission loss.The hollow fiber prepared by the subject and improve the transmission efficiency ofthe conventional air-core optical fiber, and reducing the transmission loss. Basicallyachieve the goal of hollow-core fiber short-distance transmission of UV laser.