Abstract:
An optical fiber waveguide of the type comprising an outer cladding layer, an axially disposed core of SiO.sub.2 doped with GeO.sub.2 and a first inner cladding layer of SiO.sub.2 doped with an oxide such as P.sub.2 O.sub.5 for lowering the preform processing temperature. A second inner cladding layer of pure SiO.sub.2 is disposed between the first inner cladding layer and the core to prevent P.sub.2 O.sub.5 from diffusing into the core, thereby eliminating absorption losses from the P--O--H band in the 1.1-1.8 .mu.m region.
Abstract translation:一种光纤波导,其包括外包层,轴向设置的掺杂有GeO 2的SiO 2芯和掺杂有诸如P 2 O 5的氧化物的SiO 2的第一内包层,用于降低预成型件的加工温度。 在第一内包层和芯之间设置有纯SiO 2的第二内包层,以防止P2O5扩散到芯中,从而消除了1.1-1.8μm区域中的P-O-H带的吸收损耗。
Abstract:
Optical transmission line glass includes phosphorus pentoxide and germanium dioxide as the major glass forming oxides and gallium trioxide for waterproofing and refractive index control. A method of manufacture of such glass material utilizes a gas phase chemical reaction.
Abstract:
In the manufacture of silica optical fibers a tube having an internal coating of a volatile dopant is locally heated by a hot zone repeatedly traversed along its length to promote shrinkage and finally collapse of the tube bore. During the shrinkage prior to the final collapse traversal a gas flow of oxygen and a halide of the volatile dopant is maintained through the tube in order firstly to provide a small overpressure to ensure circularity in the shrinkage and secondly to compensate for the tendency for dopant to be lost by volatilization.
Abstract:
A method of making glass optical waveguides by the flame hydrolysis technique. Particles of glass soot produced by flame hydrolysis are deposited on the outside surface of a mandrel to form a porous preform. The soot particles closer to the mandrel have a refractive index greater than that of the soot disposed toward the outer surface of the preform. The mandrel is removed and the resultant hollow soot preform is supported in a draw furnace through which a helium-rich gas flows. The preform is heated to a temperature sufficient to cause said soot to consolidate and simultaneously permit an optical waveguide filament to be drawn therefrom.
Abstract:
A method of incorporating an additive or dopant oxide in a glass body produced by the flame hydrolysis technique. Particles of the primary glass former are produced by flame hydrolysis and deposited to form a porous body which is impregnated, in part at least, with a dopant which may be dissolved or suspended in a vehicle. The body is then thermally consolidated with the dopant dispersed therein.
Abstract:
The present invention relates to a method of forming an optical fiber precursor including: forming an alkali metal doped tube; inserting an optical fiber core rod within the alkali metal doped tube; forming a cladding jacket around the alkali metal doped tube; and diffusing an alkali metal from the alkali metal doped tube through a surface of the optical fiber core rod. The present invention further relates to an optical fiber preform having: an optical fiber core rod; an alkali metal doped tube surrounding the optical fiber core rod; and a cladding jacket surrounding the alkali metal doped tube.
Abstract:
An optical fiber has a core region that is doped with one or more viscosity-reducing dopants in respective amounts that are configured, such that, in a Raman spectrum with a frequency shift of approximately 600 cm−1, the fiber has a nanoscale structure having an integrated D2 line defect intensity of less than 0.025. Alternatively, the core region is doped with one or more viscosity-reducing dopants in respective amounts that are configured such that the fiber has a residual axial compressive stress with a stress magnitude of more than 20 MPa and a stress radial extent between 2 and 7 times the core radius.According to another aspect of the invention a majority of the optical propagation through the fiber is supported by an identified group of fiber regions comprising the core region and one or more adjacent cladding regions. The fiber regions are doped with one or more viscosity-reducing dopants in respective amounts and radial positions that are configured to achieve viscosity matching among the fiber regions in the identified group.
Abstract:
An optical fiber package is described comprising a light transmitting core having a core diameter, a coating layer surrounding the core, and wherein the amount of chlorine in the light transmitting core region is homogeneous and comprises at least 3000 ppm. The fiber package is such that the optical fiber core exhibits a reduction in the hydrogen induced attenuation losses. A method for fabricating the optical fiber package is also disclosed.
Abstract:
Provided is lithium disilicate crystalline glass containing cristobalite crystal phase for high strength and aesthetic traits and its manufacturing process thereof. Exemplary embodiments of the present invention provide the high strength and aesthetic lithium disilicate crystalline glass, one kind of dental restoration materials, and its manufacturing method which induces the growth of the different crystal phase, cristobalite, from glass with lithium disilicate crystal.
Abstract:
Provided is lithium disilicate crystalline glass containing cristobalite crystal phase for high strength and aesthetic traits and its manufacturing process thereof. Exemplary embodiments of the present invention provide the high strength and aesthetic lithium disilicate crystalline glass, one kind of dental restoration materials, and its manufacturing method which induces the growth of the different crystal phase, cristobalite, from glass with lithium disilicate crystal.