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1. WO2000043742 - SENSITIVE LASER SPECTROSCOPIC DETECTION BASED ON THREE-DIMENSIONAL NONLINEAR FOUR-WAVE MIXING

Publication Number WO/2000/043742
Publication Date 27.07.2000
International Application No. PCT/US2000/001287
International Filing Date 19.01.2000
Chapter 2 Demand Filed 16.08.2000
IPC
G01J 3/45 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
28Investigating the spectrum
45Interferometric spectrometry
G01N 21/74 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
71thermally excited
74using flameless atomising, e.g. graphite furnaces
CPC
G01J 3/45
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
45Interferometric spectrometry
G01N 21/74
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
71thermally excited
74using flameless atomising, e.g. graphite furnaces
Applicants
  • SAN DIEGO STATE UNIVERSITY FOUNDATION [US/US]; 5250 Campanile Drive San Diego, CA 92182-1934, US
Inventors
  • TONG, William, G.; US
Agents
  • WETHERELL, John, R., Jr.; Fish & Richardson P.C. Suite 500 4350 La Jolla Village Drive San Diego, CA 92122, US
Priority Data
09/399,93021.09.1999US
60/116,52420.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SENSITIVE LASER SPECTROSCOPIC DETECTION BASED ON THREE-DIMENSIONAL NONLINEAR FOUR-WAVE MIXING
(FR) DETECTION SPECTROSCOPIQUE LASER A SENSIBILITE ELEVEE AXEE SUR UN MELANGE A QUATRE ONDES NON LINEAIRE TRIDIMENSIONNEL
Abstract
(EN)
Devices and techniques for performing spectroscopic measurements in a sample vapor by using a four-wave-mixing optical system. A spectrometer (100) comprises a gas-phase atomizer (130) to vaporize a sample solution to produce a sample vapor, first and second alignment templates (120, 122) having apertures to align a probe beam (111P), first and second pump beams (111B, 111F) to form a four-wave mixing configuration, a laser (102) tunable to generate a laser beam (103) at a desired wavelength corresponding to an absorption line in the sample vapor, and optical elements (108, 110) disposed relative to the laser (102) and the atomizer (130) to split the laser beam (103) into a probe beam (111P) and the first and second pump beams (111B, 111F). The probe beam (111P), the first and second pump beams (111B, 111F) are directed to overlap with one another in the sample vapor to produce a signal beam (111S) through a four-wave mixing process.
(FR)
Cette invention a trait à des dispositifs et à des techniques permettant d'effectuer des mesures spectroscopiques d'une vapeur d'échantillon à l'aide d'un système optique de mélange à quatre ondes. Le spectromètre (100) comporte un atomiseur phase gazeuse (130) destiné à vaporiser une solution d'échantillon de manière à produire une vapeur d'échantillon, deux gabarits d'alignement (120, 122) pourvus d'ouvertures permettant d'aligner un faisceau sonde (111P), deux faisceaux pompe (111B, 111F) destinés à former une configuration de mélange à quatre ondes, un laser (102) accordable destiné à produire un faisceau laser (103) à la longueur d'onde désirée correspondant à une ligne d'absorption dans la vapeur d'échantillon et des éléments optiques (108, 110) placés par rapport au laser (102) à l'atomiseur (130) de manière à segmenter le faisceau laser (103) en faisceau sonde (111P) et en faisceaux pompe (111B, 111F). Le faisceau sonde (111P) et les faisceaux pompe (111B, 111F) sont orientés de manière à se chevaucher dans la vapeur d'échantillon pour produire un faisceau signal (111S) par le biais d'un processus de mélange à quatre ondes.
Also published as
Latest bibliographic data on file with the International Bureau