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1. WO2000042683 - HIGH-PERFORMANCE LASER COOLING DEVICE

Publication Number WO/2000/042683
Publication Date 20.07.2000
International Application No. PCT/FR2000/000071
International Filing Date 14.01.2000
IPC
F25B 23/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
23Machines, plant, or systems, with a single mode of operation not covered by groups F25B1/-F25B21/135
H01S 3/042 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
02Constructional details
04Cooling arrangements
042for solid state lasers
CPC
F25B 23/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
23Machines, plant, or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
H01S 3/0408
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
02Constructional details
04Cooling arrangements
0408Radiative cooling, e.g. by anti-Stokes scattering in the active medium
H01S 3/042
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
02Constructional details
04Cooling arrangements
042for solid state lasers
Applicants
  • THOMSON-CSF [FR/FR]; 173, boulevard Haussmann F-75008 Paris, FR (AllExceptUS)
  • FREY, Robert [FR/FR]; FR (UsOnly)
  • MICHERON, François [FR/FR]; FR (UsOnly)
Inventors
  • FREY, Robert; FR
  • MICHERON, François; FR
Agents
  • BROCHARD, Pascale ; Thomson-CSF Propriété Intellectuelle Dépt. Brevets 13, avenue du Prés. Salvador Allende F-94117 Arcueil Cedex, FR
Priority Data
99/0033614.01.1999FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) HIGH-PERFORMANCE LASER COOLING DEVICE
(FR) DISPOSITIF DE REFROIDISSEMENT LASER A FORTE EFFICACITE
Abstract
(EN)
The invention concerns a high-performance laser cooling device, for example for cooling systems such as low noise detection and amplification systems. The inventive device comprises for example a laser cooling material (MRL1) for laser cooling a system (SYS) thermally coupled with said material. The interaction of the material with a laser pump (PMP1) of predetermined frequency w1 results in the spontaneous isotropic emission of protons of frequency $g(v)1 identical to the frequency of the pump beam and photons of frequency $g(v)2 higher than frequency $g(v)1 of the pump beam, the emission of the latter protons causing the cooling material to be cooled. The inventive device further comprises recirculating means for sending back towards the laser cooling material (MRL1) the frequency $g(v)1 photons. In one particular embodiment, the recirculating means comprise a shell (COQ) spherical in shape, at the centre of which is placed the cooling material (MRL1), thermally insulated from the cooling material. The shell is coated with a treating coat (TRT1) reflecting the $g(v)1 frequency protons and with a coat (TRT2) converting the $g(v)2 frequency protons into $g(v)1 frequency protons, the converting coat covering the reflecting treatment coat (TRT1). The inventive device considerably enhances the cooling efficiency of laser cooling devices.
(FR)
L'invention concerne un dispositif de refroidissement laser à forte efficacité, par exemple pour le refroidissement des systèmes tels que les systèmes de détection et d'amplification à faible bruit. Le dispositif selon l'invention comprend par exemple un matériau refroidisseur laser (MRL1) pour le refroidissement laser d'un système (SYS) couplé thermiquement avec ledit matériau. L'interaction du matériau avec un laser de pompe (PMP1) de fréquence prédéterminée w1 résulte en l'émission spontanée isotrope de photons de fréquence $g(v)1 identique à la fréquence du faisceau pompe et de photons de fréquence $g(v)2 supérieure à la fréquence $g(v)1 du faisceau de pompe, l'émission de ces derniers photons conduisant au refroidissement du matériau refroidisseur. Le dispositif selon l'invention comprend en outre des moyens de recyclage permettant de renvoyer vers le matériau refroidisseur laser (MRL1) les photons de fréquence $g(v)1. Selon une variante, les moyens de recyclage comprennent une coque (COQ) de forme sphérique, au centre de laquelle est positionné le matériau refroidisseur (MRL1), isolée thermiquement du matériau refroidisseur. La coque est recouverte d'un traitement (TRT1) réfléchissant pour les photons de fréquence $g(v)1 et d'une couche de conversion (TRT2) des photons de fréquence $g(v)2 en photons de fréquence $g(v)1, la couche de conversion recouvrant le traitement (TRT1) réfléchissant. Le dispositif selon l'invention permet une nette augmentation de l'efficacité de refroidissement des dispositifs refroidisseurs laser.
Also published as
US09623480
Latest bibliographic data on file with the International Bureau