Method for producing a preform mould for optical fibres
A method for the production of a preform blank for optical fibres, which has a core and an outer jacket of fused silica or doped fused silica, which incorporates the following process stages: preparing a tube (1) as an outer fused silica jacket; inserting at least one porous or loose material elemen...
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creator | ALBERT MUHLICH WOLFGANG RUFFING RALF TAKKE ANTON STEINKOHL UWE CHRISTIANSEN KARLHEINZ RAU DR HANS-ULRICH BONEWITZ KARL KREUTZER FRITZ SIMMAT KARL-FRIEDRICH KLEIN |
description | A method for the production of a preform blank for optical fibres, which has a core and an outer jacket of fused silica or doped fused silica, which incorporates the following process stages: preparing a tube (1) as an outer fused silica jacket; inserting at least one porous or loose material element (2) into the fused silica tube; connecting the extremities (4, 6) of the fused silica jacket tube to a gas feed and discharge system; heat-treating the fused silica/porous or loose material element at approximately 1000 DEG C in the gaseous atmosphere which is passed through the porous or loose material element; sealing off one extremity (4) of the fused silica jacket tube; vitrifying the porous or loose material element whilst maintaining a reduced pressure in the fused silica jacket tube and simultaneously drawing into the preform blank whilst shrinking-on the fused silica outer jacket during traversal of a heating section. |
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DR HANS-ULRICH BONEWITZ ; KARL KREUTZER ; FRITZ SIMMAT ; KARL-FRIEDRICH KLEIN</creatorcontrib><description>A method for the production of a preform blank for optical fibres, which has a core and an outer jacket of fused silica or doped fused silica, which incorporates the following process stages: preparing a tube (1) as an outer fused silica jacket; inserting at least one porous or loose material element (2) into the fused silica tube; connecting the extremities (4, 6) of the fused silica jacket tube to a gas feed and discharge system; heat-treating the fused silica/porous or loose material element at approximately 1000 DEG C in the gaseous atmosphere which is passed through the porous or loose material element; sealing off one extremity (4) of the fused silica jacket tube; vitrifying the porous or loose material element whilst maintaining a reduced pressure in the fused silica jacket tube and simultaneously drawing into the preform blank whilst shrinking-on the fused silica outer jacket during traversal of a heating section.</description><edition>4</edition><language>eng</language><subject>CHEMISTRY ; 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inserting at least one porous or loose material element (2) into the fused silica tube; connecting the extremities (4, 6) of the fused silica jacket tube to a gas feed and discharge system; heat-treating the fused silica/porous or loose material element at approximately 1000 DEG C in the gaseous atmosphere which is passed through the porous or loose material element; sealing off one extremity (4) of the fused silica jacket tube; vitrifying the porous or loose material element whilst maintaining a reduced pressure in the fused silica jacket tube and simultaneously drawing into the preform blank whilst shrinking-on the fused silica outer jacket during traversal of a heating section.</description><subject>CHEMISTRY</subject><subject>GLASS</subject><subject>MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES</subject><subject>METALLURGY</subject><subject>MINERAL OR SLAG WOOL</subject><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</subject><subject>OPTICS</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1986</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDD3TS3JyE9RSMsvUigoyk8pTc7MS1dIBLJTgUK5Crn5pTkQ2fyCkszkxByFtMykotRiHgbWtMSc4lReKM3NIO_mGuLsoZtakB-fWlyQmJyal1oS7-5kZGhuZmJu5GhMWAUAC2ss4g</recordid><startdate>19861231</startdate><enddate>19861231</enddate><creator>ALBERT MUHLICH</creator><creator>WOLFGANG RUFFING</creator><creator>RALF TAKKE</creator><creator>ANTON STEINKOHL</creator><creator>UWE CHRISTIANSEN</creator><creator>KARLHEINZ RAU</creator><creator>DR HANS-ULRICH BONEWITZ</creator><creator>KARL KREUTZER</creator><creator>FRITZ SIMMAT</creator><creator>KARL-FRIEDRICH KLEIN</creator><scope>EVB</scope></search><sort><creationdate>19861231</creationdate><title>Method for producing a preform mould for optical fibres</title><author>ALBERT MUHLICH ; 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inserting at least one porous or loose material element (2) into the fused silica tube; connecting the extremities (4, 6) of the fused silica jacket tube to a gas feed and discharge system; heat-treating the fused silica/porous or loose material element at approximately 1000 DEG C in the gaseous atmosphere which is passed through the porous or loose material element; sealing off one extremity (4) of the fused silica jacket tube; vitrifying the porous or loose material element whilst maintaining a reduced pressure in the fused silica jacket tube and simultaneously drawing into the preform blank whilst shrinking-on the fused silica outer jacket during traversal of a heating section.</abstract><edition>4</edition><oa>free_for_read</oa></addata></record> |
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subjects | CHEMISTRY GLASS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS |
title | Method for producing a preform mould for optical fibres |
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