Processes of manufacture of fluoride glass fibers and optical components
AssigneeLe Verre Fluore S.A.
InventorsGwenael Maze, Vincent Cardin
Life of this patent
Estimating the term…
Abstract
A process for manufacturing optical fibers and components from bars or molds of fluoride glass draws out optical quality molds from highly pure glass. The glass is stretched or fibered into optical fibers in a dry atmosphere free of dust, organic, metallic or mineral vapors. The process leads to a low hydroxyl content fluoride glass which is used in the manufacture of optical fibers and components. The dehydration of the fluoride mixture occurs during the steps of prolonged heating at under 450.degree. C. in the presence of fluoride or ammoniumbifluoride, and of holding the molten mixture at a high temperature until dehydration occurs. The drawing out, stretching, and fibering are carried out in a vacuum.
Claims22
A process to manufacture optical fibers and components from bars or molds of fluoride glass consisting in the drawing out of optical quality molds from highly pure fluoride glass and the stretching or the fibering of said molds into optical fibers characterized in that these operations on PG,27 fluoride glass are carried out in a dry atmosphere free of dust, organic, metallic or mineral vapors under high temperatures until dehydration of the fluoride glass occurs.
A process for manufacturing optical fibers and components from bars or molds or fluoride glass, said process consisting in drawing out optical quality molds from highly pure fluoride glass and stretching or fibering said molds into optical fibers characterized in that these operations are carried out in a dry atmosphere free of dust, organic, metallic or mineral vapors;
- said process further being for the preparation of a low hydroxyl content fluoride glass to be used in the manufacturing of optical fibers and components, characterized in that the dehydration of the fluoride mixture to obtain the glass is done by the steps of prolonged heating at under 450.degree. C. in the presence of fluoride or ammoniumbifluoride, and holding the molten mixture at a high temperature until dehydration occurs, these different steps being carried out in an anhydrous atmosphere.
A process for manufacturing optical fibers and components from bars or molds of fluoride glass, said process consisting in drawing out optical quality molds from highly pure fluoride glass and stretching or fibering said molds into optical fibers characterized in that these operations are carried out in a dry atmosphere free of dust, organic, metallic or mineral vapors;
- said process further being for the preparation of a low hydroxyl content fluoride glass to be used in the manufacturing of optical fibers and components, characterized in that the dehydration of the fluoride mixture to obtain the glass is done by the steps of prolonged heating at under 450.degree. C. in the presence of fluoride or ammoniumbifluoride, and holding the molten mixture at a high temperature until dehydration occurs, and further characterized in that the drawing out operations of the mold and the stretching and fibering are carried out in a vacuum.
A process for manufacturing optical fibers and components from bars or molds of fluoride glass, said process consisting in drawing out optical quality molds from highly pure fluoride glass and stretching or fibering said molds into optical fibers characterized in that these operations are carried out in a dry atmosphere free of dust, organic, metallic or mineral vapors;
- said process further being for the preparation of a low hydroxyl content fluoride glass to be used in the manufacturing of optical fibers and components, characterized in that the dehydration of the fluoride mixture to obtain the glass is done by the steps of prolonged heating at under 450.degree. C. in the presence of fluoride or ammoniumbifluoride, and holding the molten mixture at a high temperature until dehydration occurs, and further characterized in that the process of drying out the molds, stretching and fibering are carried out in a helium atmosphere.
Dependencies are inferred from the claim text.