Abstract:
A biocompatible, biodegradable composite material, and method of using nanoparticles formed within the composite material for nerve repair are disclosed. The nanoparticles may not be formed until the glass degrades upon contact with a fluid in vivo or in vitro .
Abstract:
A photonic band gap fiber and method of making thereof is provided. The fiber is made of a non-silica-based glass and has a longitudinal central opening, a microstructured region having a plurality of longitudinal surrounding openings, and a jacket. The air fill fraction of the microstructured region is at least about 40%. The fiber may be made by drawing a preform into a fiber, while applying gas pressure to the microstructured region. The air fill fraction of the microstructured region is changed during the drawing.
Abstract:
To overcome problems of fabricating conventional core-clad optical fibre from non-silica based (compound) glass, it is proposed to fabricate non-silica based (compound) glass optical fibre as holey fibre i.e. one contining Longitudinal holes in the cladding. This removes the conventional problems associated with mismatch of the physical properties of the core and clad compound glasses, since a holey fibre can be made of a single glass composition. With a holey fibre, it is not necessary to have different glasses for the core and cladding, since the necessary refractive index modulation between core and cladding is provided by the microstructure of the clad, i.e. its holes, rather than by a difference in materials properties between the clad and core glasses. Specifically, the conventional thermal mismatch problems between core and clad are circumvented. A variety of fibre types can be fabricated from non-silica based (compounds) glasses, for example: single-mode fibre; photonic band gap fibre; highly non-linear fibre; fibre with photosensitivity written gratings and other refractive index profile structures; and rare-earth doped fibres (e.g. Er, Nd, Pr) to provide gain media for fibre amplifiers and lasers.
Abstract:
PURPOSE: A method and apparatus for manufacturing glass nanopowder of a low melting point are provided to manufacture bismuth-based glass nanopowder without environmental contamination by using thermal plasma from a DC source. CONSTITUTION: A bismuth-based glass powder precursor of a low melting point is prepared(S11). The glass powder precursor is injected into a reaction tube of a plasma processing apparatus(S12). Thermal plasma is applied to the glass powder precursor by a DC source. The glass powder precursor is vaporized(S13). Gas obtained by vaporizing the glass powder precursor is rapidly cooled(S14). [Reference numerals] (S11) Preparing a glass powder precursor; (S12) Injecting the precursor into a reaction tube; (S13) Vaporizing the precursor by thermal plasma; (S14) Rapidly cooling the precursor; (S15) Injecting oxygen gas; (S16) Capturing amorphous nano glass powder;
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing an air-clad type optical fiber by a method other than an extrusion molding process. SOLUTION: Regarding the method of manufacturing an optical fiber where, to the center of a hollow glass fiber, an optical transmission glass elongating in the axial direction thereof is held, a glass rod 10 in which, around the central axis, three or more holes 11 elongating to the axial direction thereof and having mutually equal diameters are formed in such a manner that the distance between the axes of the respective holes and the central axis is made equal, further, the distance among the axes of the respective holes is made equal, and also, the part surrounded by these holes is made into the part so as to be the optical transmission glass is subjected to a stage in which it is heated while being pressurized so as to expand the holes with one end thereof sealed, thus its drawing is caused, so as to be a preform in which each glass between the respective holes has a planar shape, and this preform is drawn, so as to be the optical fiber in which the optical transmission glass is held by the planar glass. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a columnar glass body which has a plurality of areas continuing in the longitudinal direction and having a high heavy ion concentration; and a method for producing an optical fiber having a plurality of cores. SOLUTION: A columnar glass body which has a plurality of areas continuing in the longitudinal direction and having a high heavy ion concentration is produced as follows: a heavy ion in a thin beam state is implanted at a specified position in a long columnar glass body to form an area with a high heavy ion concentration; by successively changing the relative positions of an ion accelerator and the columnar glass body in the longitudinal direction of the columnar glass body, the heavy ion in a thin beam state is successively implanted into the columnar glass body to form an area continuing in the longitudinal direction and having a high heavy ion concentration; and the above operations are repeated at least twice at other positions in the columnar glass body to form a plurality of areas continuing in the longitudinal direction and having a high heavy ion concentration. An optical fiber having a plurality of cores is produced by subjecting the columnar glass body having a plurality of areas continuing in the longitudinal direction and having a high heavy ion concentration to a drawing treatment in the longitudinal direction. COPYRIGHT: (C)2005,JPO&NCIPI