LYSLEDEROVERVAAGNINGSSYSTEM OG FREMGANGSMAADE TIL AT OVERVAAGE EN LYSLEDER
An optical fiber sensing system for detecting intrusion of optical fiber or optical fiber cables includes an interferometric arrangement. Two ports (28, 30) of a four port splitter (25) are connected to a source (26) of optical power such as a laser, for example, and to a detector (32). The other tw...
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| creator | WHITE, IAN ARTHUR DUNN, LAWRENCE RUSSELL WHITE, III, WILLARD CHANDLER |
| description | An optical fiber sensing system for detecting intrusion of optical fiber or optical fiber cables includes an interferometric arrangement. Two ports (28, 30) of a four port splitter (25) are connected to a source (26) of optical power such as a laser, for example, and to a detector (32). The other two ports (46,48) are connected to ends of a length (50) of monitoring optical fiber. An input signal to the splitter is split with one subsignal being directed in one direction around the length of optical fiber which serves as a common path between the two ports. The other signal is caused to travel around the common path in an opposite direction. The split signals are recombined in the splitter and their phase difference measured as a detectable pattern by the detector. Should there be intrusion of the optical fiber or a cable containing the monitoring optical fiber, the pattern which is detected will change a significant amount. |
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Two ports (28, 30) of a four port splitter (25) are connected to a source (26) of optical power such as a laser, for example, and to a detector (32). The other two ports (46,48) are connected to ends of a length (50) of monitoring optical fiber. An input signal to the splitter is split with one subsignal being directed in one direction around the length of optical fiber which serves as a common path between the two ports. The other signal is caused to travel around the common path in an opposite direction. The split signals are recombined in the splitter and their phase difference measured as a detectable pattern by the detector. 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Should there be intrusion of the optical fiber or a cable containing the monitoring optical fiber, the pattern which is detected will change a significant amount.</description><subject>ALARM SYSTEMS</subject><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>MEASURING</subject><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</subject><subject>OPTICS</subject><subject>ORDER TELEGRAPHS</subject><subject>PHYSICS</subject><subject>SIGNALLING</subject><subject>SIGNALLING OR CALLING SYSTEMS</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>TRANSMISSION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1990</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZPDyiQz2cXVxDfIPcw0Kc3R09_P0cw8OjgwOcfVV8HdXcAty9XV3BAr5Ojq6uCqEePooOIYowBS7Krj6KcBM4GFgTUvMKU7lhdLcDHJuriHOHrqpBfnxqcUFicmpeakl8S7eJkbmhhaWjsYEFQAAoLUspQ</recordid><startdate>19900301</startdate><enddate>19900301</enddate><creator>WHITE, IAN ARTHUR</creator><creator>DUNN, LAWRENCE RUSSELL</creator><creator>WHITE, III, WILLARD CHANDLER</creator><scope>EVB</scope></search><sort><creationdate>19900301</creationdate><title>LYSLEDEROVERVAAGNINGSSYSTEM OG FREMGANGSMAADE TIL AT OVERVAAGE EN LYSLEDER</title><author>WHITE, IAN ARTHUR ; DUNN, LAWRENCE RUSSELL ; WHITE, III, WILLARD CHANDLER</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_DK427189A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>dan</language><creationdate>1990</creationdate><topic>ALARM SYSTEMS</topic><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>MEASURING</topic><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>ORDER TELEGRAPHS</topic><topic>PHYSICS</topic><topic>SIGNALLING</topic><topic>SIGNALLING OR CALLING SYSTEMS</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>TRANSMISSION</topic><toplevel>online_resources</toplevel><creatorcontrib>WHITE, IAN ARTHUR</creatorcontrib><creatorcontrib>DUNN, LAWRENCE RUSSELL</creatorcontrib><creatorcontrib>WHITE, III, WILLARD CHANDLER</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>WHITE, IAN ARTHUR</au><au>DUNN, LAWRENCE RUSSELL</au><au>WHITE, III, WILLARD CHANDLER</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>LYSLEDEROVERVAAGNINGSSYSTEM OG FREMGANGSMAADE TIL AT OVERVAAGE EN LYSLEDER</title><date>1990-03-01</date><risdate>1990</risdate><abstract>An optical fiber sensing system for detecting intrusion of optical fiber or optical fiber cables includes an interferometric arrangement. 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| language | dan |
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| subjects | ALARM SYSTEMS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY MEASURING OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR TRANSMISSION |
| title | LYSLEDEROVERVAAGNINGSSYSTEM OG FREMGANGSMAADE TIL AT OVERVAAGE EN LYSLEDER |
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