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1. WO2015134635 - HIGH POWER FIBER LASER SAFETY CONTROL SYSTEM

Publication Number WO/2015/134635
Publication Date 11.09.2015
International Application No. PCT/US2015/018778
International Filing Date 04.03.2015
IPC
H01S 3/13 2006.1
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
13Stabilisation of laser output parameters, e.g. frequency, amplitude
H01S 3/067 2006.1
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
063Waveguide lasers, e.g. laser amplifiers
067Fibre lasers
CPC
H01S 3/067
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
063Waveguide lasers, ; i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
067Fibre lasers
H01S 3/0912
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
0912Electronics or drivers for the pump source, i.e. details of drivers or circuitry specific for laser pumping
H01S 3/094003
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
H01S 3/094042
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
094042of a fibre laser
H01S 3/094076
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
094076Pulsed or modulated pumping
H01S 3/13
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
13Stabilisation of laser output parameters, e.g. frequency, amplitude
Applicants
  • IPG PHOTONICS CORPORATION [US]/[US]
Inventors
  • VOLODEN, Valentin
  • GUSKOV, Sergey
Agents
  • KATESHOV, Yuri
Priority Data
61/947,58104.03.2014US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) HIGH POWER FIBER LASER SAFETY CONTROL SYSTEM
(FR) SYSTÈME DE COMMANDE DE SÉCURITÉ DE LASER À FIBRE DE FORTE PUISSANCE
Abstract
(EN) A laser safety control system is configured with a power source module directly coupled to an AC source. The power source module includes a galvanically isolated DC/DC converter, which has at least one output capacitor, and a safety mechanism. The safety mechanism is configured with first and second safety channels which operate independently from one another so as to switch the normal operating regime of the power source module to the safe regime. In the normal operating regime, its DC output has a high voltage, whereas in the safe regime the DC output has a low voltage lower than the high voltage. The safety channels each include a shutdown circuit and a discharging circuit. The shutdown circuit is operative to switch the DC/DC converter off. The discharging circuit is operative to discharge the output capacitor below to the desired. The switching off DC/DC converter and discharging of the output capacitor define the safe regime of the power source module. The laser safety control system further includes a high power fiber laser system and a laser pump system which receives the DC output from the power source and is prevented from radiating emission in the safe regime of the power source because in the safe regime the low voltage is insufficient for generation the laser emission.
(FR) L'invention concerne un système de commande de sécurité de laser qui comporte un module source d'alimentation directement couplé à une source de courant alternatif (CA). Le module source d'alimentation comprend un convertisseur continu/continu galvaniquement isolé, qui comprend au moins un condensateur de sortie, et un mécanisme de sécurité. Le mécanisme de sécurité comporte des premier et second canaux de sécurité qui fonctionnent indépendamment l'un de l'autre de manière à faire passer le module source d'alimentation d'un régime de fonctionnement normal à un régime de sécurité. Dans le régime de fonctionnement normal, sa sortie en courant continu (CC) présente une tension élevée, tandis que dans le régime de sécurité, la sortie CC présente une tension basse inférieure à la tension élevée. Les canaux de sécurité comprennent chacun un circuit d'arrêt et un circuit de décharge. Le circuit d'arrêt est opérationnel pour mettre hors tension le convertisseur continu/continu. Le circuit de décharge est opérationnel pour décharger le condensateur de sortie jusqu'à la plus basse tension souhaitée. La mise hors tension du convertisseur continu/continu et la décharge du condensateur de sortie définissent le régime de sécurité du module source d'alimentation. Le système de commande de sécurité de laser comprend en outre un système laser à fibre de forte puissance et un système de pompage laser qui reçoit la sortie CC de la source d'alimentation et est empêché d'émettre un rayonnement dans le régime de sécurité de la source d'alimentation en raison du fait que, dans le régime de sécurité, la tension basse est insuffisante pour produire l'émission laser.
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