Abstract: Disclosed is an optical fiber having a core with an alkali metal oxide dopant in an peak amount greater than about 0.002 wt. % and less than about 0.1 wt. %. The alkali metal oxide concentration varies with a radius of the optical fiber. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained. Also disclosed are several methods of making the optical fiber including the steps of forming an alkali metal oxide-doped rod, and adding additional glass to form a draw perform. Preferably, the draw preform has a final outer dimension (d2), wherein an outer dimension (d1) of the rod is less than or equal to 0.06 times the final outer dimension (d2). In a preferred embodiment, the alkali metal oxide-doped rod is inserted into the centerline hole of a preform to form an assembly.

Abstract: Disclosed is an optical fiber having a core with an alkali metal oxide dopant in an peak amount greater than about 0.002 wt. % and less than about 0.1 wt. %. The alkali metal oxide concentration varies with a radius of the optical fiber. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained. Also disclosed are several methods of making the optical fiber including the steps of forming an alkali metal oxide-doped rod, and adding additional glass to form a draw perform. Preferably, the draw preform has a final outer dimension (d2), wherein an outer dimension (d1) of the rod is less than or equal to 0.06 times the final outer dimension (d2). In a preferred embodiment, the alkali metal oxide-doped rod is inserted into the centerline hole of a preform to form an assembly.

Abstract: An apparatus for small particle and nanoparticle synthesis. A durable particle generator capable of high temperature particle synthesis. The particle generator is configured as to minimize susceptor degradation associated with harsh reaction conditions, for example, using encased susceptors.

Abstract: The present invention relates generally to an apparatus for small particle and nanoparticle synthesis. A durable particle generator capable of high temperature particle synthesis is disclosed. The particle generator is configured as to minimize susceptor degradation associated with harsh reaction conditions.

Abstract: Systems and methods for generating nanomaterial are described wherein a reaction, for example, oxidation, for generating nanomaterial occurs in an open reaction zone which is external to the nanoparticle generator. The systems and methods minimize damage to the hot wall reactors evident in conventional systems and methods used to generate nanomaterial.

Abstract: Nanomaterial and methods for generating nanomaterial are described wherein a reaction, for example, decomposition, for generating nanomaterial occurs utilizing a hot wall reactor.

Abstract: Methods for coating a glass substrate as it is being drawn, for example, during fusion draw or during fiber draw are described. The coatings are conductive coatings which can also be transparent. The conductive thin film coated glass substrates can be used in, for example, display devices, solar cell applications and in many other rapidly growing industries and applications.

Abstract: Disclosed are systems and methods for forming glass sheets. Methods and systems are provided that comprise a refractory body configured to receive glass-based material and means for transmitting energy to selectively heat at least a portion of the refractory body through the glass-based material. In one aspect, the energy transmitted is of a selected frequency that is not fully absorbed by the glass-based material and is at least partially absorbed by the refractory body. The energy can be transmitted by a laser beam array, a scanning laser beam, a microwave generator, a radio frequency generator, or other means.

Abstract: Methods for coating a glass substrate as it is being drawn, for example, during fusion draw or during fiber draw are described. The coatings are conductive metal oxide coatings which can also be transparent. The conductive thin film coated glass substrates can be used in, for example, display devices, solar cell applications and in many other rapidly growing industries and applications.

Abstract: An apparatus useful for electrostatic deposition (ESD) of aerosol particles and methods of depositing the aerosol particles onto a substrate are disclosed. The ESD apparatus and the method of the present invention are useful for electrostatically depositing nanoparticles produced by gas-phase synthesis onto a substrate where the velocity of the flow of aerosol can be controlled.

Abstract: A system useful for electrostatic deposition (ESD) of aerosol particles and methods of depositing the aerosol particles onto a substrate are disclosed. The ESD system and the method of the present invention are useful for electrostatically depositing nanoparticles produced by gas-phase synthesis, using an induction particle generator, onto a substrate. Direct current may be used with minimized corona leakage in the system, which would otherwise be damaging to the induction particle generator.

Abstract: The present invention relates generally to an apparatus for small particle and nanoparticle synthesis. A durable particle generator capable of high temperature particle synthesis is disclosed. The particle generator is configured as to minimize susceptor degradation associated with harsh reaction conditions.