| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e5db580deca7130dbe51805c6c608b35 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02F2202-102
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02F1-3137
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01S5-3428
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02F1-3132
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02F1-212
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01S5-34306
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02F1-0152 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01S5-3434
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y20-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01S3-1055
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02F1-01708
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01S5-06256 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02F1-015
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02F1-21
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02F1-313
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01S5-34 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01S5-042
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02F1-025
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02F1-017
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01S5-0625
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B6-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B6-122
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01S5-343
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01S3-1055
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01S5-00 |
| filingDate |
1992-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b751321f833fe0fbb15167286e23c3d0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4c7e17207e6d5e2fcd409d9b870f9b39 |
| publicationDate |
1992-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0505289-A2 |
| titleOfInvention |
Optical waveguide having a variable refractive index and an optical device having such an optical waveguide |
| abstract |
The waveguide comprises a substrate (10) of a semiconductor material doped to a first conductivity type, a multiple quantum well layer (12) provided on the substrate for guiding an optical beam, a clad layer (16) doped to a second conductivity type and provided on the multiple quantum well layer for confining the optical beam, a first electrode (20a, 20b) provided on the upper major surface of the clad layer for injecting carriers of a first type into the quantum well layer, and a second electrode (18) provided on the lower major surface of the substrate for injecting carriers of a second type into the quantum well layer. The multiple quantum well layer (12) comprises an alternate stacking of: a quantum well layer having a composition set to provide a smallest band gap that is possible under a constraint that the quantum well layer maintains a lattice constant with the substrate and a thickness set with respect to the optical energy of the optical beam such that a discrete quantum level of carriers is formed in the quantum well layer with an energy level larger than the optical energy by about 50 meV; and a barrier layer having a band gap substantially larger than the band gap of the quantum well layer. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004006007-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008034852-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6882758-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2906412-A1 |
| priorityDate |
1991-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |