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1. WO2020117816 - ULTRAHIGH FIBER LASER SYSTEM WITH CONTROLLABLE OUTPUT BEAM INTENSITY PROFILE

Publication Number WO/2020/117816
Publication Date 11.06.2020
International Application No. PCT/US2019/064251
International Filing Date 03.12.2019
IPC
H01S 3/067 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
063Waveguide lasers, e.g. laser amplifiers
067Fibre lasers
H01S 3/101 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
101Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted
H01S 5/40 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
40Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02-H01S5/30128
Applicants
  • IPG PHOTONICS CORPORATION [US]/[US]
Inventors
  • SCHERBAKOV, Eugene
  • FOMIN, Valentin
  • ABRAMOV, Andrey
  • ABRAMOV, Mikhail
  • YAGODKIN, Dmitri
Agents
  • KATESHOV, Yuri, B.
Priority Data
62/774,84603.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ULTRAHIGH FIBER LASER SYSTEM WITH CONTROLLABLE OUTPUT BEAM INTENSITY PROFILE
(FR) SYSTÈME LASER À FIBRE ULTRA-HAUTE PUISSANCE À PROFIL D'INTENSITÉ DE FAISCEAU DE SORTIE COMMANDABLE
Abstract
(EN)
The disclosed ultra-high power all fiber laser system is configured with multiple spaced apart fiber lasers outputting respective laser beams respective paths. The disclosed system is further configured with a tapered fiber-bundle including at least, one central guiding fiber and a plurality of peripheral guiding fibers. The disclosed system further has a multiclad delivery fiber configured with a double-bottle neck cross-section and provided with at least two concentric and radially spaced apart inner and outer cores. The inner core is coupled to the peripheral guiding fibers while the inner core is spliced to the central guiding fiber so that a system output emitted from the inner core of the delivery fiber has a different beam shape from the system output emitted from the outer core.
(FR)
L'invention porte sur un système laser à fibre ultra-haute puissance qui est configuré avec de multiples lasers à fibre espacés l'un de l'autre émettant des faisceaux laser respectifs le long de chemins respectifs. Le système selon l'invention est en outre configuré avec un faisceau de fibres conique comprenant au moins une fibre de guidage centrale et une pluralité de fibres de guidage périphériques. Le système selon l'invention comprend en outre une fibre de distribution multigaine configurée avec une section transversale à double étranglement et pourvue d'au moins deux cœurs interne et externe concentriques espacés et radialement espacés l'un de l'autre. Le cœur interne est couplé aux fibres de guidage périphériques tandis que le cœur interne est épissé à la fibre de guidage centrale de telle sorte qu'une sortie de système émise à partir du cœur interne de la fibre de distribution ait une forme de faisceau différente de celle de la sortie de système émise à partir du cœur externe.
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