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1. WO1996002965 - SOLID-STATE LASER

Publication Number WO/1996/002965
Publication Date 01.02.1996
International Application No. PCT/RU1994/000153
International Filing Date 18.07.1994
Chapter 2 Demand Filed 16.01.1996
IPC
H01S 3/06 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
05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06Construction or shape of active medium
H01S 3/092 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
0915by incoherent light
092of flash lamp
H01S 3/16 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
16Solid materials
CPC
H01S 3/092
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
09Processes or apparatus for excitation, e.g. pumping
091using optical pumping
0915by incoherent light
092of flash lamp
H01S 3/1608
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
14characterised by the material used as the active medium
16Solid materials
1601characterised by an active (lasing) ion
1603rare earth
1608erbium
Applicants
  • SEMENOV, Alexei Alexandrovich [RU/RU]; RU
  • KARLOV, Vasily Nikolaevich [RU/RU]; RU (UsOnly)
Inventors
  • SEMENOV, Alexei Alexandrovich; RU
  • KARLOV, Vasily Nikolaevich; RU
Priority Data
Publication Language Russian (RU)
Filing Language Russian (RU)
Designated States
Title
(EN) SOLID-STATE LASER
(FR) LASER A CORPS SOLIDE
Abstract
(EN)
A solid-state laser is proposed with an emission wavelength of greater than 1.4 $g(m)m to eliminate the risk of damage to human skin and eyes. The proposed laser comprises: an active medium alloyed with Er3+ ions; an optical pumping source separated from the active medium by an additional filtering layer in the form of optical elements, and/or coatings applied thereto, and/or a liquid medium, which intercept and eliminate ultraviolet radiation and are transparent to light in the excitation wavelength of the active medium. The cumulative internal transmission density of the filtering layer along the path of a given beam in the laser from the pumping source to the active medium, including the path in the casing of the pumping source, must be greater than 2 in the wavelength range below 320 nm and not more than 0.1 in the excitation spectrum of the active medium with wavelengths greater than 360 nm. Filtration in the laser is accomplished with the aid of, for example, a 0.3-1.5 $g(m)m thick film of cerium oxides applied to the surface of the transparent material of the laser components (CeO2 accounting for not less than two thirds of the oxides in question) and/or using a liquid medium containing cerium compounds, e.g. based on an aqueous solution of the salts CeCl3 and/or CeBr3 with a sum molar concentration of Ce3+ ions of at least 0.4 mol/l.
(FR)
L'invention concerne un laser à corps solide d'une longueur d'onde d'émission supérieure à 1,4 $g(m)m permettant d'éliminer le risque de détérioration de la peau et des yeux de l'homme. Le laser de l'invention comprend: un milieu actif allié à des ions Er3+; une source de pompage optique séparée du milieu actif par une couche filtrante supplémentaire se présentant sous la forme d'éléments optiques; et/ou des revêtements qui lui sont appliqués, et/ou un milieu liquide, lesquels interceptent et éliminent le rayonnement ultra-violet et sont transparents à la lumière dans la longueur d'onde d'excitation du milieu actif. La densité de transmission interne cumulative de la couche filtrante sur le chemin d'un faisceau donné dans le laser, de la source de pompage au milieu actif, y compris le chemin se trouvant dans l'enveloppe de la source de pompage, doit être supérieure à 2 dans la plage de longueurs d'ondes inférieures à 320 nm et inférieure à 0,1 dans le spectre d'excitation du milieu actif avec des longueurs d'ondes supérieures à 360 nm. Le filtrage dans le laser est effectué à l'aide, par exemple, d'une couche mince d'une épaisseur comprise entre 0,3 et 1,5 $g(m)m d'oxyde de cérium appliquées à la surface du matériau transparent des composants du laser (CeO2 représentant au moins deux tiers des oxydes en question) et/ou à l'aide d'un milieu liquide contenant des composés au cérium, par exemple à base d'une solution aqueuse des sels CeCl3 et/ou CeBr3, avec une concentration molaire totale d'ions Ce3+ d'au moins 0,4 mol/l.
Also published as
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