| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c186e9ae8cafab5df5c8d80cfa7b0fa1 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B2205-08 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B37-018
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B37-027
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B37-01211 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03B37-027
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03B37-012
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03B37-018 |
| filingDate |
1979-09-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1980-05-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
GB-2033372-A |
| titleOfInvention |
A Method of Producing an Optical Waveguide |
| abstract |
A transparent glass rod which has been prepared by collapsing a porous glass rod, the pores of which have been doped with a dopant deposited on the internal wall thereof to enhance the index of refraction of the rod, is drawn and the viscosity and coefficient of thermal expansion of the central portion of the glass rod are matched with the viscosity and coefficient of thermal expansion of the portions of the glass rod which have a refractive index lower than that of the central portion. An optical waveguide produced by the method of the invention has a high mechanical strength and a low absorption loss. <IMAGE> |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0109192-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2624621-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2530234-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2583408-A1 |
| priorityDate |
1978-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |