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1. WO2013009911 - PHOTODISSOCIATION AND LASING IN AIR FOR REMOTE SENSING

Publication Number WO/2013/009911
Publication Date 17.01.2013
International Application No. PCT/US2012/046305
International Filing Date 11.07.2012
IPC
H01S 3/22 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
14characterised by the material used as the active medium
22Gases
H01S 3/094 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
09Processes or apparatus for excitation, e.g. pumping
091using optical pumping
094by coherent light
G01N 21/65 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
63optically excited
65Raman scattering
G01N 21/17 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
17Systems in which incident light is modified in accordance with the properties of the material investigated
H01S 3/23 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
23Arrangement of two or more lasers not provided for in groups H01S3/02-H01S3/14113
H01S 3/00 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
CPC
G01N 2021/1725
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 sub-millimetre waves, infrared, visible or ultraviolet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
1717with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
1725Modulation of properties by light, e.g. photoreflectance
G01N 2021/1793
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 sub-millimetre waves, infrared, visible or ultraviolet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
1793Remote sensing
G01N 2021/655
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 sub-millimetre waves, infrared, visible or ultraviolet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
63optically excited
65Raman scattering
653Coherent methods [CARS]
655Stimulated Raman
G01N 21/1717
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 sub-millimetre waves, infrared, visible or ultraviolet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
1717with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
G01N 21/65
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 sub-millimetre waves, infrared, visible or ultraviolet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
63optically excited
65Raman scattering
H01S 3/0014
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
0014Monitoring arrangements not otherwise provided for
Applicants
  • TRUSTEES OF PRINCETON UNIVERSITY [US]/[US] (AllExceptUS)
  • MILES, Richard, B. [US]/[US] (UsOnly)
  • DOGARIU, Arthur [US]/[US] (UsOnly)
  • MICHAEL, James, B. [US]/[US] (UsOnly)
Inventors
  • MILES, Richard, B.
  • DOGARIU, Arthur
  • MICHAEL, James, B.
Agents
  • HSIEH, Timothy, M.
Priority Data
13/546,88811.07.2012US
61/506,47711.07.2011US
61/511,42425.07.2011US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PHOTODISSOCIATION AND LASING IN AIR FOR REMOTE SENSING
(FR) SYSTÈMES ET PROCÉDÉS POUR FORMER UNE ÉMISSION LASER À PARTIR D'UN GAZ MOLÉCULAIRE
Abstract
(EN)
Systems and methods for lasing molecular gases, and systems and methods of detecting molecular species are provided. The systems and methods can include the use of an excitation laser (820) tuned to a wavelength associated with oxygen or nitrogen. The lasing-can occur in both the forward and reverse directions relative to the excitation laser beam (822). Reverse lasing can provide a laser beam (824) that propagates back toward the excitation laser source (820), and can provide a method for remote sampling of molecular species contained in the air with a dichroic beam splitter (835) and detector (830). For example, systems and methods of detecting a molecular species of interest can be achieved by using the properties of the backward or forward propagating air laser to indicate a change in a pulse from the source of laser pulses caused by a modulation laser (810) tuned to interact with the molecular species of interest by changing the properties of the air by heating or multi-photon ionization of a Raman interaction.
(FR)
La présente invention concerne des systèmes et des procédés pour former une émission laser à partir de gaz moléculaires, et des systèmes et des procédés de détection d'espèces moléculaires. Les systèmes et les procédés peuvent faire appel à laser d'excitation accordé à une longueur d'onde associée à l'oxygène ou à l'azote. L'émission laser peut se produire à la fois vers l'avant et vers l'arrière du faisceau laser d'excitation. Une émission laser vers l'arrière peut fournir un faisceau laser qui retourne vers la source du laser d'excitation, et peut fournir un procédé d'échantillonnage à distance d'espèces moléculaires contenues dans l'air. Par exemple, des systèmes et des procédés de détection d'une espèce moléculaire d'intérêt peuvent faire appel aux propriétés du laser de l'air se propageant vers l'arrière ou vers l'avant afin de détecter la modification d'une impulsion provenant de la source d'impulsions laser provoquée par un laser de modulation accordé pour interagir avec les espèces moléculaires d'intérêt.
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