Measuring length of optical fibre cable involves deriving length from wavelength-dependent damping constants of cable and measured ratio of input/output intensities for two wavelengths

Method involves determining the ratio of the input and output intensities of light entering and leaving the cable (4) for two different wavelengths or wavelength regions. The length of the cable is derived from the wavelength-dependent damping constants of the optical fibre cable and the measured ra...

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Bibliographic Details
Main Authors FRISCH, ERNST GEORG, BRAUMANDL, WALTER
Format Patent
LanguageEnglish
German
Published 04.05.2000
Edition7
Subjects
COLORIMETRY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:Method involves determining the ratio of the input and output intensities of light entering and leaving the cable (4) for two different wavelengths or wavelength regions. The length of the cable is derived from the wavelength-dependent damping constants of the optical fibre cable and the measured ratio. An Independent claim is also included for an arrangement for measuring the length of an optical fibre cable. Es wird ein Verfahren zum Messen der Länge eines Lichtleiters (4) beschrieben, bei dem das Verhältnis der Eintrittsintensität des Lichts in den Lichtleiter zur Austrittsintensität aus dem Lichtleiter bei zwei unterschiedlichen Wellenlängen oder Wellenlängenbereiche bestimmt wird und die Länge des Lichtleiters aus den Wellenlängen abhängigen Dämpfungskonstanten des Lichtleiters und den ermittelten Verhältnissen berechnet wird.
Bibliography:Application Number: DE1998147617