Abstract:
According to one example of the invention an optical fiber comprises: (i) silica based, rare earth doped core having a first index of refraction n1; (ii) at least one silica based cladding surrounding the core and having a second index of refraction n2, such that n 1 > n 2 ; wherein at least one of the core or cladding is doped with Al 2 O 3 , such that the ratio of max wt% to min wt% of Al 2 O 3 concentration is less than 2:1
Abstract translation:根据本发明的一个示例,光纤包括:(i)具有第一折射率n1的二氧化硅基稀土掺杂的核; (ii)至少一个围绕所述芯并且具有第二折射率n2的基于二氧化硅的包层,使得n1> n2; 其中所述芯或包层中的至少一个掺杂有Al 2 O 3,使得Al 2 O 3浓度的最大重量%与最小重量%的比率小于2:1
Abstract:
The invention relates to a method for preparing doped oxide material, in which method substantially all the reactants (B, D) forming the oxide material are brought to a vaporous reduced form in the gas phase and after this to react with each other in order to form oxide particles (P). According to the invention, said reactants (B, D) in vaporous and reduced form are mixed together to a gas flow (BD) of reactants, which gas flow (BD) is further condensated fast in such a manner that substantially all the component parts of the reactants (B, D) reach a supersaturated state substantially simultaneously by forming oxide particles (P) in such a manner that there is no time to reach chemical phase balances.
Abstract:
A method and apparatus (20) for manufacturing optical components. A burner (24) generates soot (22), and a surface area collector (26) collects the soot (22). The burner (24) is disposed such that the soot (22) collected within the surface area collector (26) is substantially not reheated by subsequently deposited soot (22). Magnetic forces (50) direct the soot to desired location(s) within the surface area collector (26). The surface area collector (26) operates at relatively low temperatures sufficient to retain rather volatile substances, such as fluorine, in the soot (22).
Abstract:
A new optical fiber and method of manufacturing the same developed for use with surgical laser systems. The fiber core utilizes an ultra-low expansion (ULE) material. The preferred ULE fiber consists of silicon dioxide core doped with titanium dioxide which is cladded and jacketed for chemical and abrasion resistance. The resulting fiber is stable against degradation due to thermal expansion.
Abstract:
Method of manufacturing optical fibres starting from a thick-walled glass tube (1), preferably a quartz tube, where one or more substances (4) which are to comprise the core of the optical fibre are either deposited and sintered directly on the inside of the thick-walled tube or alternatively on the inside of a thin-walled tube which is subsequently collapsed and inserted in the thick-walled tube, after which the thick-walled tube is heated to its collapsing temperature with the aid of microwave energy supplied to a cavity in which a part of the tube is to be found. The invention is distinguished in that the material from which the thick-walled quartz tube is manufactured is caused to contain contaminants in the form of one or more substances which give rise to a dissipation factor for converting the microwave energy to heat in said material which is sufficient for enabling heating the quartz tube (1) to its collapsing temperature and in that a zone is arranged for braking or substantially preventing diffusion of said contaminants from the quartz tube (1) to the core, said zone being created between the tube and the substance or substances which are to comprise the fibre core.
Abstract:
One aspect relates to a method for the manufacture of doped quartz glass. Moreover, one aspect relates to quartz glass obtainable according to the method including providing a soot body, treating the soot body with a gas, heating an intermediate product and vitrifying an intermediate product.
Abstract:
The present disclosure is directed to a method of making an optical fiber with improved bend performance, the optical fiber having a core and at least one cladding layer, and a chlorine content in the in the last layer of the at least one cladding layer that is greater than 500 ppm by weight. The fiber is prepared using a mixture of a carrier gas, a gaseous chlorine source material and a gaseous reducing agent during the sintering of the last or outermost layer of the at least one cladding layer. The inclusion of the reducing gas into a mixture of the carrier gas and gaseous chlorine material reduces oxygen-rich defects that results in at least a 20% reduction in TTP during hydrogen aging testing.
Abstract:
The invention relates to a method for producing a doped SiO2 slurry in which an SiO2 suspension is brought into interaction with at least one doping solution, wherein the SiO2 suspension and/or the doping solution act on one another in the form of an atomized spray, the average droplet diameter of which is in the range between 10 μm and 100 μm. The invention further relates to the use of an SiO2 slurry doped by the atomized spray method for the production of doped quartz glass, particularly for the production of laser-active quartz glass.
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.