摘要:
The invention relates to method of coating the surface of an inorganic substrate of glass, silicon dioxide, ceramics or carbon, which method comprises a step of cleaning the surface of the substrate by subjecting the surface to a reducing gas plasma, a step of activating the surface by generating radicals on the surface of the substrate by subjecting the surface to a reducing gas plasma and forming a first layer on the substrate surface using a plasma enhanced polymerization process employing one or more monomers comprising monomers with a sufficient low molecular weight for them to be in their gaseous state in the gas plasma, selected from the group consisting of C1-C16 alkanes, C2-C16 alkanes, C2-C16 alkynes, C2-C16 alkynes, styrene, aromatic monomers of styrene compounds, monomers of vinyl- and acrylate-compounds.
摘要:
A method of manufacturing a silica glass article comprising: (1) placing a starting silica glass article in an atmosphere containing hydrogen molecules to introduce hydrogen molecules into said starting silica glass article at a concentration of not lower than 1 x 10 16 molecules/cm 3 ; (2) taking said hydrogen-introduced silica glass article out of the atmosphere containing hydrogen molecules; and (3) irradiating said silica glass article with at least 10 6 pulses of an excimer laser beam having an energy of 10 mJ per pulse within a period in which the concentration of hydrogen molecules remaining in said silica glass article is not lower than 1 x 10 16 molecules/cm 3 , to obtain a processed silica glass article which causes substantially no increase in its light absorption in an ultraviolet region. Also disclosed are silica glass articles and optical fiber processed employing the above method.
摘要:
By forming many structural defects intentionally in silica glass by UV irradiation and subsequently removing the structural defects by heat treatment, structural relaxation proceeds to give structurally stable glass and defects due to ultraviolet irradiation are prevented from being formed. An optical fiber bundle is formed by winding a large number of optical fibers made of silica glass to form a column. Fixers are secured at both ends of the optical fiber bundle, which are inserted into and secured to each of the central holes of the fixers. The optical fiber bundle is inserted into a fiber bundle protection tube, which is inserted into a heater. The heater is formed by a spirally wound ribbon-like heat body covered with an insulating material. Lead wires are connected to both ends of the heat body. The heater and each of the lead wires are inserted into an outer protection tube.
摘要:
Die Erfindung betrifft eine Vorrichtung zur Härtung einer auf ein Kabel (1) aufgebrachten Beschichtung, wobei die Beschichtung mindestens einen Fotoinitiator aufweist, aufweisend eine Vielzahl von UV-LEDs oder UV-LED-Packungen (2), deren emittierte Strahlung mindestens eine Wellenlänge im Bereich des Absorptionsspektrums des Fotoinitiators aufweist, wobei die UV-LEDs oder UV-LED-Packungen (2) radial so um die Längsachse eines innerhalb der Vorrichtung anordbaren Kabels (1) angeordnet sind, dass die Austrittsöffnungen der UV-LEDs radial in Richtung des Kabels (1) weisen, so dass die von den UV-LEDs emittierte Strahlung auf direktem Strahlwege auf das Kabel Wellenleiter (1) trifft.
摘要:
A radiation curable coating composition for an optical fiber comprising: at least one urethane (meth) acrylate oligomer, at least one reactive diluent monomer and at least one photo initiator is described and claimed. The composition is capable of undergoing photopolymerization when coated on an optical fiber and when irradiated by a light emitting diode (LED) light, having a wavelength from about 100 nm to about 900nm, to provide a cured coating on the optical fiber, with the cured coating having a top surface, and the cured coating having a Percent Reacted Acrylate Uπsaturation (%RAU) at the top surface of about 60% or greater. Also described and claimed are the process to coat an optical fiber with the LED curable coating for optical fiber and a coated optical fiber where the coating has been cured by application of LED light.
摘要:
The present invention to a coating dispersion comprising: a polyorganosilsesquioxane; and a silicon oxide powder dispersed in said polyorganosilsesquioxane, said oxide powder having a refractive index of from about 1.2 to about 2.7 and including a plurality of particles having a particle size less about 100 nanometers, wherein plurality of particles is present in said coating dispersion in an amount of from about 10 wt.% to about 80 wt.%; said coating dispersion providing a coating having transparency to ultraviolet radiation.
摘要:
A method for manufacturing an optical fiber by contacting the optical fiber during the draw operation with deuterium, a deuterium-containing gas mixture or a deuterium ion plasma. The treatment or coating is performed in a treatment tube that is either separate from or combined with the fiber cooling tube.