http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106153174-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01H9-00 |
| filingDate | 2015-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2019-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2019-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-106153174-B |
| titleOfInvention | Phase demodulator, optical fiber sound pressure demodulating system, demodulation method and manufacturing method |
| abstract | The present invention is suitable for sound pressure measurement engineering device technique field, provide a kind of phase demodulator, optical fiber sound pressure demodulating system, demodulation method and manufacturing method, the phase demodulator, using the structure of Sagnac fiber optic loop, including wideband light source, photodetector connects the signal analysis module of photodetector, further includes: is separately connected the first fiber coupler of wideband light source and photodetector；The first fiber coupler is connected, adjusts the intensity of CW light, or adjust the variable optical attenuator of the intensity of CCW light；Connect the fiber delay line of the first fiber coupler；It is separately connected fiber delay line and variable optical attenuator, the second fiber coupler of the light of coupled film chip optical fibre sound pressure sensor reflection；The second fiber coupler is connected, the optical frequency shifter of stable pi/2 quadrature phase biasing is provided；Optical frequency shifter is connected, and passes through the optical fiber depolarizer of the external diaphragm-type optical-fiber sound pressure sensor of optical fiber.The present invention realizes the stable phase angle demodulation of diaphragm-type optical-fiber sound pressure sensor. |
| priorityDate | 2015-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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