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1. WO2013143862 - PUMP RADIATION ARRANGEMENT AND METHOD FOR PUMPING A LASER-ACTIVE MEDIUM

Publication Number WO/2013/143862
Publication Date 03.10.2013
International Application No. PCT/EP2013/055217
International Filing Date 14.03.2013
IPC
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
H01S 3/0941 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
0941of a semiconductor laser, e.g. of a laser diode
H01S 5/065 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
5Semiconductor lasers
06Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
065Mode locking; Mode suppression; Mode selection
H01S 5/14 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
5Semiconductor lasers
10Construction or shape of the optical resonator
14External cavity lasers
H01S 3/1055 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
10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
105by controlling the mutual position or the reflecting properties of the reflectors of the cavity
1055one of the reflectors being constituted by a diffraction grating
H01S 3/106 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
10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
106by controlling a device placed within the cavity
CPC
H01S 3/0604
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
05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
06Construction or shape of active medium
0602Crystal lasers or glass lasers
0604in the form of a plate or disc
H01S 3/091
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
H01S 3/094015
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
094by coherent light
094003the pumped medium being a fibre
094015with pump light recycling, i.e. with reinjection of the unused pump light back into the fiber, e.g. by reflectors or circulators
H01S 3/094084
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
094by coherent light
094084with pump light recycling, i.e. with reinjection of the unused pump light, e.g. by reflectors or circulators
H01S 3/09415
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
094by coherent light
0941of a laser diode
09415the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
H01S 3/1055
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
10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
105by controlling the mutual position or the reflecting properties of the reflectors of the cavity ; , e.g. by controlling the cavity length
1055one of the reflectors being constituted by a diffraction grating
Applicants
  • TRUMPF LASER GMBH [DE]/[DE]
Inventors
  • SUTTER, Dirk
  • KILLI, Alexander
  • KLEINBAUER, Jochen
  • LI, Yufeng
Agents
  • KOHLER SCHMID MÖBUS, PATENTANWÄLTE
Priority Data
102012207339.603.05.2012DE
61/617,93130.03.2012US
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) PUMPSTRAHLUNGSANORDNUNG UND VERFAHREN ZUM PUMPEN EINES LASERAKTIVEN MEDIUMS
(EN) PUMP RADIATION ARRANGEMENT AND METHOD FOR PUMPING A LASER-ACTIVE MEDIUM
(FR) DISPOSITIF DE RAYONNEMENT DE POMPAGE, ET PROCÉDÉ DE POMPAGE D'UN MILIEU ACTIF LASER
Abstract
(DE)
Die Erfindung betrifft eine Pumpstrahlungsanordnung (11), umfassend: eine Pumpstrahlungsquelle (1) zum Erzeugen von Pumpstrahlung (3), ein Mittel (5) zur Wellenlängenstabilisierung der Pumpstrahlungsquelle (1), sowie ein laseraktives Medium (12), das von der Pumpstrahlung (3) bidirektional durchlaufen wird. Die Pumpstrahlungsanordnung (11) weist auch einen Retroreflektor (14) zur Reflexion von nicht vom laseraktiven Medium (12) absorbierter Pumpstrahlung (3c) zurück zur Pumpstrahlungsquelle (1) sowie ein wellenlängenselektives Element (15) zur Vermeidung einer Wellenlängendestabilisierung der Pumpstrahlungsquelle (1) durch Filterung von unerwünschten Spektralanteilen (10) von nicht vom laseraktiven Medium (12) absorbierter Pumpstrahlung (3c) auf. Beispielsweise kann zum Pumpen eine Laserdiode mit externem Volume-Bragg-Grating verwendet werden, wobei in einem gekoppelten Resonator der LD sich ein Yb:YAG als laseraktives Medium befindet als auch ein Fabry-Perot Etalon zur Unterdrückung von spektralen Anteilen, welche nicht von dem schmalbandigen VBG unterdrückt werden.
(EN)
The invention relates to a pump radiation arrangement (11), comprising: a pump radiation source (1) for creating pump radiation (3), a medium (5) for stabilising the wavelengths of the pump radiation source (1), and a laser-active medium (12), through which the pump radiation (3) runs bidirectionally. The pump radiation arrangement (11) also has a retroreflector (14) for reflecting the pump radiation (3c) not absorbed by the laser-active medium (12) back to the pump radiation source (1), and a wavelength-selective element (15) for avoiding wavelength destabilisation of the pump radiation source (1) by filtering undesired spectral components (10) of the pump radiation (3c) not absorbed by the laser-active medium (12). For example, a laser diode with an external volume Bragg grating can be used for pumping, wherein a coupled resonator of the LD has a Yb:YAG as a laser-active medium, as well as a Fabry-Perot etalon for suppressing spectral components that are not suppressed by the narrow-band VBG.
(FR)
L'invention concerne un dispositif de rayonnement de pompage (11) comprenant : une source de rayonnement de pompage (1) pour la production d'un rayonnement de pompage (3), un moyen (5) de stabilisation de longueurs d'onde de la source de rayonnement de pompage (1), ainsi qu'un milieu actif laser (12), qui est traversé bidirectionnellement par le rayonnement de pompage. Le dispositif de rayonnement de pompage (11) présente également un rétro-réflecteur (14), pour la réflexion de rayonnement de pompage (3c) non absorbé par le milieu actif laser (12), en retour vers la source de rayonnement de pompage (1), ainsi qu'un élément de sélection de longueurs d'onde (15), pour éviter une stabilisation de longueurs d'onde de la source de rayonnement de pompage (1), par filtrage de fractions spectrales (10) indésirables, du rayonnement de pompage (3c) non absorbé par le milieu actif laser (12). Par exemple, une diode laser à réseau de Bragg en volume externe peut être utilisée, un Yb:YAG se trouvant dans un résonateur couplé de la LD, en tant que milieu actif laser, ainsi qu'un étalon Fabry-Perot, pour la suppression des fractions spectrales, qui n'ont pas été supprimées par le VBG à bande étroite.
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