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1. WO1998018030 - OPTICAL FIBRE WITH A GRATING ON ITS END FACE

Publication Number WO/1998/018030
Publication Date 30.04.1998
International Application No. PCT/GB1997/002903
International Filing Date 21.10.1997
Chapter 2 Demand Filed 09.05.1998
IPC
G01J 3/02 2006.01
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
02Details
G01J 3/18 2006.01
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
12Generating the spectrum; Monochromators
18using diffraction elements, e.g. grating
CPC
G01J 3/02
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
02Details
G01J 3/0218
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
02Details
0205Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
0218using optical fibers
G01J 3/18
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
12Generating the spectrum; Monochromators
18using diffraction elements, e.g. grating
G01J 3/1895
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
12Generating the spectrum; Monochromators
18using diffraction elements, e.g. grating
1895using fiber Bragg gratings or gratings integrated in a waveguide
G01J 3/36
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
28Investigating the spectrum
30Measuring the intensity of spectral lines directly on the spectrum itself
36Investigating two or more bands of a spectrum by separate detectors
G02B 6/02061
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
02Optical fibre with cladding ; with or without a coating
02057comprising gratings
02061Grating external to the fibre and in contact with the fibre, e.g. evanescently coupled, gratings applied to the fibre end
Applicants
  • BICC PUBLIC LIMITED COMPANY [GB]/[GB] (AllExceptUS)
  • SCHMITT, Nicolas, François, René [FR]/[GB] (UsOnly)
Inventors
  • SCHMITT, Nicolas, François, René
Agents
  • DLUGOSZ, Anthony, Charles
  • POOLE, Michael, John
Priority Data
9621907.621.10.1996GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL FIBRE WITH A GRATING ON ITS END FACE
(FR) FIBRE OPTIQUE A RESEAU DE DIFFRACTION A SA SURFACE TERMINALE
Abstract
(EN)
An end face (6) of an optical fibre (1) has a Bragg grating formed thereon. An arrangement incorporating such a fibre has a plurality of detectors (24, 26; 44, 45, 46; 28, 30) located at the end face of the fibre to detect light emerging at different angles with respect to the axis of the fibre. The fibre carries optical signals at at least two different wavelengths. The signals are diffracted by the Bragg grating so that different signals are detected by the detecting means. A similar arrangement can be used for demultiplexing signals at different wavelengths, or in sensing applications where light of different wavelengths is used to carry signals with information about the measure and reference signals.
(FR)
L'invention concerne une fibre (1) optique qui comporte une surface (6) terminale présentant un réseau de Bragg formé sur celle-ci. Un dispositif comprenant ladite fibre présente une multiplicité de détecteurs (24, 26; 44, 45, 46; 28, 30), situés sur la surface terminale de la fibre, afin de détecter la lumière qui émerge à des angles différents par rapport à l'axe de ladite fibre. Cette fibre est porteuse de signaux optiques à au moins deux longueurs d'onde différentes. Ces signaux sont diffractés par le réseau de Bragg, de sorte que différents signaux sont détectés par les moyens de détection. Un dispositif similaire peut être utilisé pour le démultiplexage de signaux à des longueurs d'onde différentes, ou dans des applications de détection, dans lesquelles la lumière de différentes longueurs d'onde est utilisée pour porter des signaux contenant des informations sur la mesure et pour porter des signaux de référence.
Also published as
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