Optical time domain reflectometry

An optical time domain reflectometry apparatus for sensing a parameter to be measured in a region of interest comprises an optical fibres, source means 1 operable to launch optical radiation into the optical fibre at a probe wavelength; and detection means 2 operable to produce electrical output sig...

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Bibliographische Detailangaben
Hauptverfasser:	PETER COLLISON WAIT, ARTHUR HAROLD HARTOG
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY MEASURING 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 THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR TRANSMISSION
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Beschreibung
Zusammenfassung:	An optical time domain reflectometry apparatus for sensing a parameter to be measured in a region of interest comprises an optical fibres, source means 1 operable to launch optical radiation into the optical fibre at a probe wavelength; and detection means 2 operable to produce electrical output signals in response to optical radiation backscattered from the optical fibre; and wherein the optical fibre comprises a first section 50 , into which optical radiation at the the probe wavelength having a preselected intensity is launched, and a second section 60 deployed in the region of interest, there being a remote amplifier arranged between the first and second sections which is operable to compensate for attenuation losses in the intensity of the probe wavelength in the first section.