Measuring a characteristic of a multimode optical fibre
Method and apparatus to measure a characteristic (e.g. temperature, strain) of a multimode optical fibre 102 deployed in a well or along an electrical cable comprises: transmitting a light pulse from a light source 104 into the fibre; passing Brillouin backscattered light that is responsive to the l...
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Patent |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | |
| container_start_page | |
| container_title | |
| container_volume | |
| creator | GARETH P LEES DYLAN H DAVIES ARTHUR H HARTOG GRAEME HILTON KAMAL KADER |
| description | Method and apparatus to measure a characteristic (e.g. temperature, strain) of a multimode optical fibre 102 deployed in a well or along an electrical cable comprises: transmitting a light pulse from a light source 104 into the fibre; passing Brillouin backscattered light that is responsive to the light pulse, from the fibre through a spatial filter 108 (e.g. near or far field spatial filter respectively connected to, and spaced apart from, a proximal end 120 of the fibre), wherein a portion of Brillouin backscattered light is passed through the spatial filter; and directing this portion (e.g. via on optical coupler 504) to optical detection equipment 110 (e.g. optical filter 112 and detector 114) for processing. The spatial filter may be positioned between the fibre and the detection equipment and may include: at least one aperture to pass a portion of a respective speckle pattern; a single mode optical fibre (200); or an opaque layer (300) with a hole (302) therein. A beam combiner (508) may be used to combine light from an optical local oscillator and the Brillouin backscattered light portion. Raman detection equipment may also be incorporated to process Raman backscattered light. |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_GB2453838A</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>GB2453838A</sourcerecordid><originalsourceid>FETCH-epo_espacenet_GB2453838A3</originalsourceid><addsrcrecordid>eNrjZDD3TU0sLi3KzEtXSFRIzkgsSkwuSS3KLC7JTFbITwOK5ZbmlGTm5qekKuQXAAUTcxTSMpOKUnkYWNMSc4pTeaE0N4O8m2uIs4duakF-fGpxQWJyal5qSby7k5GJqbGFsYWjMWEVABY4LPs</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Measuring a characteristic of a multimode optical fibre</title><source>esp@cenet</source><creator>GARETH P LEES ; DYLAN H DAVIES ; ARTHUR H HARTOG ; GRAEME HILTON ; KAMAL KADER</creator><creatorcontrib>GARETH P LEES ; DYLAN H DAVIES ; ARTHUR H HARTOG ; GRAEME HILTON ; KAMAL KADER</creatorcontrib><description>Method and apparatus to measure a characteristic (e.g. temperature, strain) of a multimode optical fibre 102 deployed in a well or along an electrical cable comprises: transmitting a light pulse from a light source 104 into the fibre; passing Brillouin backscattered light that is responsive to the light pulse, from the fibre through a spatial filter 108 (e.g. near or far field spatial filter respectively connected to, and spaced apart from, a proximal end 120 of the fibre), wherein a portion of Brillouin backscattered light is passed through the spatial filter; and directing this portion (e.g. via on optical coupler 504) to optical detection equipment 110 (e.g. optical filter 112 and detector 114) for processing. The spatial filter may be positioned between the fibre and the detection equipment and may include: at least one aperture to pass a portion of a respective speckle pattern; a single mode optical fibre (200); or an opaque layer (300) with a hole (302) therein. A beam combiner (508) may be used to combine light from an optical local oscillator and the Brillouin backscattered light portion. Raman detection equipment may also be incorporated to process Raman backscattered light.</description><language>eng</language><subject>ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS ; MEASURING ; MEASURING ANGLES ; MEASURING AREAS ; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE ; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS ; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS ; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE ; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR ; MEASURING QUANTITY OF HEAT ; MEASURING TEMPERATURE ; PHYSICS ; TARIFF METERING APPARATUS ; TESTING ; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES ; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR ; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR</subject><creationdate>2009</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20090422&DB=EPODOC&CC=GB&NR=2453838A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20090422&DB=EPODOC&CC=GB&NR=2453838A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GARETH P LEES</creatorcontrib><creatorcontrib>DYLAN H DAVIES</creatorcontrib><creatorcontrib>ARTHUR H HARTOG</creatorcontrib><creatorcontrib>GRAEME HILTON</creatorcontrib><creatorcontrib>KAMAL KADER</creatorcontrib><title>Measuring a characteristic of a multimode optical fibre</title><description>Method and apparatus to measure a characteristic (e.g. temperature, strain) of a multimode optical fibre 102 deployed in a well or along an electrical cable comprises: transmitting a light pulse from a light source 104 into the fibre; passing Brillouin backscattered light that is responsive to the light pulse, from the fibre through a spatial filter 108 (e.g. near or far field spatial filter respectively connected to, and spaced apart from, a proximal end 120 of the fibre), wherein a portion of Brillouin backscattered light is passed through the spatial filter; and directing this portion (e.g. via on optical coupler 504) to optical detection equipment 110 (e.g. optical filter 112 and detector 114) for processing. The spatial filter may be positioned between the fibre and the detection equipment and may include: at least one aperture to pass a portion of a respective speckle pattern; a single mode optical fibre (200); or an opaque layer (300) with a hole (302) therein. A beam combiner (508) may be used to combine light from an optical local oscillator and the Brillouin backscattered light portion. Raman detection equipment may also be incorporated to process Raman backscattered light.</description><subject>ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS</subject><subject>MEASURING</subject><subject>MEASURING ANGLES</subject><subject>MEASURING AREAS</subject><subject>MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE</subject><subject>MEASURING IRREGULARITIES OF SURFACES OR CONTOURS</subject><subject>MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS</subject><subject>MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE</subject><subject>MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR</subject><subject>MEASURING QUANTITY OF HEAT</subject><subject>MEASURING TEMPERATURE</subject><subject>PHYSICS</subject><subject>TARIFF METERING APPARATUS</subject><subject>TESTING</subject><subject>TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES</subject><subject>TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR</subject><subject>THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2009</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDD3TU0sLi3KzEtXSFRIzkgsSkwuSS3KLC7JTFbITwOK5ZbmlGTm5qekKuQXAAUTcxTSMpOKUnkYWNMSc4pTeaE0N4O8m2uIs4duakF-fGpxQWJyal5qSby7k5GJqbGFsYWjMWEVABY4LPs</recordid><startdate>20090422</startdate><enddate>20090422</enddate><creator>GARETH P LEES</creator><creator>DYLAN H DAVIES</creator><creator>ARTHUR H HARTOG</creator><creator>GRAEME HILTON</creator><creator>KAMAL KADER</creator><scope>EVB</scope></search><sort><creationdate>20090422</creationdate><title>Measuring a characteristic of a multimode optical fibre</title><author>GARETH P LEES ; DYLAN H DAVIES ; ARTHUR H HARTOG ; GRAEME HILTON ; KAMAL KADER</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_GB2453838A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2009</creationdate><topic>ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS</topic><topic>MEASURING</topic><topic>MEASURING ANGLES</topic><topic>MEASURING AREAS</topic><topic>MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE</topic><topic>MEASURING IRREGULARITIES OF SURFACES OR CONTOURS</topic><topic>MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS</topic><topic>MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE</topic><topic>MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR</topic><topic>MEASURING QUANTITY OF HEAT</topic><topic>MEASURING TEMPERATURE</topic><topic>PHYSICS</topic><topic>TARIFF METERING APPARATUS</topic><topic>TESTING</topic><topic>TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES</topic><topic>TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR</topic><topic>THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR</topic><toplevel>online_resources</toplevel><creatorcontrib>GARETH P LEES</creatorcontrib><creatorcontrib>DYLAN H DAVIES</creatorcontrib><creatorcontrib>ARTHUR H HARTOG</creatorcontrib><creatorcontrib>GRAEME HILTON</creatorcontrib><creatorcontrib>KAMAL KADER</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GARETH P LEES</au><au>DYLAN H DAVIES</au><au>ARTHUR H HARTOG</au><au>GRAEME HILTON</au><au>KAMAL KADER</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Measuring a characteristic of a multimode optical fibre</title><date>2009-04-22</date><risdate>2009</risdate><abstract>Method and apparatus to measure a characteristic (e.g. temperature, strain) of a multimode optical fibre 102 deployed in a well or along an electrical cable comprises: transmitting a light pulse from a light source 104 into the fibre; passing Brillouin backscattered light that is responsive to the light pulse, from the fibre through a spatial filter 108 (e.g. near or far field spatial filter respectively connected to, and spaced apart from, a proximal end 120 of the fibre), wherein a portion of Brillouin backscattered light is passed through the spatial filter; and directing this portion (e.g. via on optical coupler 504) to optical detection equipment 110 (e.g. optical filter 112 and detector 114) for processing. The spatial filter may be positioned between the fibre and the detection equipment and may include: at least one aperture to pass a portion of a respective speckle pattern; a single mode optical fibre (200); or an opaque layer (300) with a hole (302) therein. A beam combiner (508) may be used to combine light from an optical local oscillator and the Brillouin backscattered light portion. Raman detection equipment may also be incorporated to process Raman backscattered light.</abstract><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | |
| ispartof | |
| issn | |
| language | eng |
| recordid | cdi_epo_espacenet_GB2453838A |
| source | esp@cenet |
| subjects | ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASURING MEASURING ANGLES MEASURING AREAS MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS TARIFF METERING APPARATUS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR |
| title | Measuring a characteristic of a multimode optical fibre |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-05T20%3A32%3A49IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=GARETH%20P%20LEES&rft.date=2009-04-22&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EGB2453838A%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |