http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2010105684-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_70977c03b1ebfddc6903f0bf9d3c09c2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_55bc2bae9f65cfaede67b62128f00e9b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B10-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B10-614 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B10-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B10-61 |
| filingDate | 2009-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_239f2b83e4c1f646af18e453be6ab069 |
| publicationDate | 2010-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2010105684-A1 |
| titleOfInvention | Calibrating an optical downconverter |
| abstract | An apparatus for calibrating an optical downconverter (20) configured to receive an optical input signal (30) at a signal input (40) and an optical reference signal (LO) at a reference input (50), and to provide at a plurality of output nodes (R1 -R4) a plurality of characterizing signals (R1 -R4) for characterizing the optical input signal (30). The downconverter comprises a plurality of receivers (280A-280D), each having at least one optical input and providing at one of the plurality of output nodes an electrical signal, wherein each respective electrical signal is one of the plurality of characterizing signals, a plurality of optical signal paths (70, 295A, 100, 295B, 140, 295C) between the signal input and each input (200-270) of the plurality of receivers, a plurality of optical signal paths (80, 296A, 130, 296B, 190, 170, 296C) between the reference input and each input of the plurality of receivers, and at least one phase shifter (180, 190) coupled in one of the plurality of optical signal paths and being configured to provide a phase shift between its input and its output. The apparatus comprises a signal analyzing unit (290) coupled to the plurality of output nodes to receive and analyze the plurality of characterizing signals, a first switch for selectively enabling or disabling the input signal, and a second switch for selectively enabling or disabling the reference signal. The signal analyzing unit is configured to derive correction values based on determined signals at the plurality of output nodes derived from selectively enabling or disabling at least one of the input signal and the reference signal. The signal analyzing unit is configured for correcting the plurality of characterizing signals with the derived correction values. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102142902-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102142902-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012130275-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2713532-A1 |
| priorityDate | 2009-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.