摘要:
A coupler-type optical switch and a process for producing the same are disclosed, which coupler-type optical switch comprises an optical fiber coupler and a medium surrounding the photocoupler part of the optical fiber coupler and in which the refractive index of the medium is controllable, the medium comprising an energy-curing resin or a transparent liquid material and, dispersed or dissolved in the resin or liquid material, an optical material whose refractive index changes by the action of an electric or magnetic field.
摘要:
A polymer clad optical fiber comprising a core made of glass selected from the group consisting of quartz glass and optical glass, a cladding made of a cured material of a polymer composition comprising a ladder type polymethylsiloxane, a linear polymethylsiloxane having hydroxyl groups and optionally a solvent, and optionally a protecting layer made of a polymer material comprising a ladder type polysiloxane having phenyl side groups, which has low light transmission loss and increased mechanical strength.
摘要:
An optical connector for connecting optical fibers, comprises: a guide-groove substrate having grooves for positioning optical fibers and guide pins; an upper plate having groove portions each for covering the guide pins positioned in the guide grooves of the guide-groove substrate; elastic guide-pin pressing members each provided in the groove portions of the upper plate above portions where the guide pin grooves are in contact with the guide pins. In such a arrangement, it is preferable to forman oxide film on said V-grooves of the guide-groove substrate at least in the vicinity of contact points between the guide pins and the V-grooves. The optical connector further includes a resin molding portion for surrounding the substrate and the upper plate, the resin molding portion including a pair of opposite opened portions at top and bottom surfaces thereof.
摘要:
A waterproof optical fiber cable comprising at least one coated optical fiber and a waterproof compound surround said at least one coated optical fiber, wherein a swelling degree of a coating material of the optical fiber induced by said waterproof compound is not larger than 10%, which optical fiber cable has stable performances.
摘要:
The invention relates to coating composition, coated articles of manufacture, and to the formation of the coated articles. The coating is an energy-beam set resin containing fluid containing heat-expandable, fluid-encapsulating hollow spheres in the resin. The coating of a substrate, such as a communication line material, is accomplished by coating the material with a resin mixture containing expandable spheres and then exposing the coated material to an energy-beam source for a period of time to cure the resin and expand the spheres. The coating is applied to at least one filament of a communication line material. Such filaments can be gathered into bundles which are first extrusion coated with a thermoplastic polymer before being coated with the resin mixture. The composition of the resin material can be varied by changing the volume percent of the hollow spheres present in the resin mixture.
摘要:
The present invention relates to an adhesive for connecting and fixing an optical fiber to an optical connector and to an optical connector which uses that adhesive. The adhesive prevents deformation of the optical connector ferrule and stressing of the optical fiber due to hardening shrinkage during the hardening of the adhesive and/or a shrinkage during cooling of the adhesive. In accordance with the invention, (1) the value of (the coefficient of linear expansion (.degree.C..sup.-1) of the adhesive).times.(the difference between a hardening temperature of the adhesive and room temperature (.degree.C.)).times.(Young's Modulus (kg/mm.sup.2) of the adhesive) is equal to or less than about 2.5, (2) the value of (the rate of hardening shrinkage (%) of the adhesive).times.(Young's Modulus (kg/mm.sup.2) of the adhesive) is equal to or less than about 1000 and/or (3) the adhesive hardens at room temperature.
摘要翻译:本发明涉及一种用于将光纤连接和固定到光学连接器的粘合剂和使用该粘合剂的光学连接器。 粘合剂防止由于粘合剂硬化期间的硬化收缩和/或粘合剂冷却期间的收缩导致的光学连接器套圈的变形和光纤的应力。 根据本发明,(1)(粘合剂的线膨胀系数(℃-I))×(粘合剂的硬化温度与室温(℃))× (粘合剂的杨氏模量(kg / mm 2))等于或小于约2.5,(2)粘合剂的硬化收缩率(%)的值(x)(杨氏模量(kg / mm 2)) 粘合剂)等于或小于约1000和/或(3)粘合剂在室温下硬化。
摘要:
A glass fiber for optical transmission comprising a glass fiber having provided thereon a first coating layer of a hardened resin and a second fluorine-containing resin layer formed by extrusion molding is disclosed. At least one of the first and second layers contains an adsorbable solid powder which is capable of adsorbing fluorine gas and/or hydrofluoric acid generated from the fluorine-containing resin during the extrusion molding. The glass fiber has an improved mechanical strength without adversely affecting transmission properties of the glass fiber.
摘要:
A method and apparatus for coating optical transmission glass fibers with a resinous composition. A vessel is provided through which a glass fiber is drawn. While it is being drawn through the vessel, the fiber is spun, and a resin coating is applied. In order to maintain the air pressure within the vessel fairly constant, an exhaust vent is provided through which excess particles of the resinous composition may escape. Turbulence is thus substantially reduced preventing the fiber from swinging and allowing the particles to be sprayed smoothly. Further, the particles may be electrically charged so that they are both attracted to the optical fiber and repel one another during flight. The invention employs both of these features to produce a uniform coat on an optical transmission glass fiber.
摘要:
A glass fiber for use in optical transmission which comprises a first layer containing an organopolysiloxane having a refractive index higher than that of the glass which forms the outermost layer of the glass fiber, a second layer comprising an organopolysiloxane which is the same or different than the organopolysiloxane in the first layer, and a thermoplastic resin coated on the second layer in a thickness less than about 100 microns.
摘要:
A reinforced glass fiber for use in optical transmission comprising an optical fiber coated with (1) a coating of a first curable organopolysiloxane composition having a refractive index higher than that of the clad glass which forms the outermost layer of the optical fiber, said first curable organopolysiloxane composition being baked, (2) a coating of a second curable organopolysiloxane composition which can be the same as or different from the first curable organopolysiloxane composition, the second curable organopolysiloxane composition being provided on the first curable organopolysiloxane composition and being baked, and (3) optionally a coating of a thermoplastic resin composition.