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1. WO2006116590 - IMPROVED REVERSIBLE, LOW COST, DISTRIBUTED OPTICAL FIBER SENSOR WITH HIGH SPATIAL RESOLUTION

Publication Number WO/2006/116590
Publication Date 02.11.2006
International Application No. PCT/US2006/015991
International Filing Date 26.04.2006
Chapter 2 Demand Filed 11.11.2006
IPC
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
75
Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
77
by observing the effect on a chemical indicator
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24
Coupling light guides
25
Preparing the ends of light guides for coupling, e.g. cutting
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24
Coupling light guides
26
Optical coupling means
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24
Coupling light guides
26
Optical coupling means
30
for use between fibre and thin-film device
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24
Coupling light guides
26
Optical coupling means
34
utilising prism or grating
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24
Coupling light guides
42
Coupling light guides with opto-electronic elements
G01N 21/77 (2006.01)
G02B 6/25 (2006.01)
G02B 6/26 (2006.01)
G02B 6/30 (2006.01)
G02B 6/34 (2006.01)
G02B 6/42 (2006.01)
CPC
G01D 5/35316
G01N 21/6428
G01N 21/648
G01N 21/7703
Applicants
  • EGALON, Claudio Oliveira [US/US]; US
Inventors
  • EGALON, Claudio Oliveira; US
Priority Data
60/676,12128.04.2005US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) IMPROVED REVERSIBLE, LOW COST, DISTRIBUTED OPTICAL FIBER SENSOR WITH HIGH SPATIAL RESOLUTION
(FR) CAPTEUR A FIBRE OPTIQUE REPARTI, ECONOMIQUE, REVERSIBLE ET AMELIORE AVEC RESOLUTION SPATIALE ELEVEE
Abstract
(EN)
A spectroscopic based optical fiber sensor includes a sensitive optical fiber, a probing light source, a power supply, a detector means, a signal processing means, and a display means. The sensitive optical fiber has a core and a cladding - said cladding has at least one sensitive region which is optically affected by the presence of at least one measurand. The probing light source, adjacent to the sensitive fiber, transversely illuminates the fiber at said sensitive region from the outside. The probing light is modified by the sensitive fiber, coupled into the optical fiber core, either as bound modes or leaky modes, as a light signal and guided to a detector means located at the terminus of the optical fiber. The detector means correlates the intensity of the light signal with an electric signal and transmits the electric signal to the signal processing means, wherein the electric signal is correlated to the quantity being measured. The correlated quantity being transmitted and displayed on the display means.
(FR)
L’invention concerne un capteur à fibre optique de type spectroscopique comprenant une fibre optique sensible, une source lumineuse d’exploration, une unité d’alimentation, un détecteur, un moyen de traitement de signal et un moyen d’affichage. La fibre optique sensible possède un cœur et une gaine, ladite gaine présentant au moins une zone sensible qui subit un effet optique par la présence d’au moins une mesurande. La source lumineuse d’exploration, adjacente à la fibre sensible, éclaire de manière transversale la fibre sur la zone sensible par l’extérieur. La lumière d’exploration est modifiée par la fibre sensible, couplée dans le cœur, en mode guidé ou en mode tunnel, sous forme de signal lumineux et guidée vers un détecteur situé à l’extrémité de la fibre optique. Le détecteur met en corrélation l’intensité du signal lumineux avec un signal électrique et transmet ce dernier au moyen de traitement de signal, qui met en corrélation le signal électrique à la quantité mesurée. La quantité corrélée est transmise au moyen d’affichage et affichée.
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