http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2068359-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a3149ecf4fd3c1a547051baa1b05a78b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C16-511 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B37-0183 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C16-511 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03B37-018 |
| filingDate | 1981-01-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1981-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-2068359-A |
| titleOfInvention | Manufacture of optical fibre preforms |
| abstract | In the manufacture of an optical fibre preform by forming a vitreous coating, preferably composed of silica and one or more dopants, in the bore of a glass (preferably silica) substrate tube, from a gaseous reaction mixture passed through the tube, the reaction mixture is carried by an ionisable gas and the reaction is activated by a plasma produced in the gas by means of a plasma-exciting device maintained in a stationary position around the gas exit end (3) of the tube. The plasma column is swept along the tube by varying the power input to the device (7), while the tube is heated and the gas pressure is kept below 10 Torr, to effect direct formation of a glass layer (12) along the swept and heated region of the tube. Preferred apparatus includes an asymmetrical microwave cavity (4), and a conducting tube (8) surrounding the substrate tube (1), the arrangement being such that the conducting tube and the plasma column (10) form a coaxial waveguide along which a progressive electromagnetic wave, preferably in the H10 mode, is launched. <IMAGE> |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0150578-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3222189-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2019149897-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7981485-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5000773-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9067816-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2151609-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5188648-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2816137-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1923360-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/NL-1032867-C2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2594659-A1 |
| priorityDate | 1980-01-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 48.