| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_03721e344a72026d125291e6c56c1be6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2b6121dedd894b3f760906b68697d616 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-39 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01J3-42 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-39 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01J3-42 |
| filingDate |
2001-01-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2004-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c14c25abd2c6fa5f92d584853c593aac
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_35328bd118712f58b23db393fe0d303c |
| publicationDate |
2004-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6727492-B1 |
| titleOfInvention |
Cavity ringdown spectroscopy system using differential heterodyne detection |
| abstract |
An ac technique for cavity ringdown spectroscopy permits 1x10<-10 >absorption sensitivity with microwatt light power. Two cavity modes are provided temporally out of phase such that when one mode is decaying, the other mode is rising. When one of the modes probes intra-cavity absorption of a sample gas, heterodyne detection between the two modes reveals dynamic time constants associated with the cavity and the cavity plus intra-cavity absorption. The system and method provides a quick comparison between on-resonance and off-resonance modes and enables sensitivities that approach the shot-noise limit. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2012212731-A1
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http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11035789-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7054008-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010012843-A1
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http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10921246-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7333206-B2 |
| priorityDate |
2000-01-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |