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1. WO1996004700 - OPTICAL FIBER STRUCTURE FOR EFFICIENT USE OF PUMP POWER

Publication Number WO/1996/004700
Publication Date 15.02.1996
International Application No. PCT/US1995/009311
International Filing Date 24.07.1995
Chapter 2 Demand Filed 07.02.1996
IPC
G02B 6/036 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
02Optical fibre with cladding
036core or cladding comprising multiple layers
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 3/094 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
CPC
G02B 6/03605
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
02Optical fibre with cladding ; with or without a coating
036core or cladding comprising multiple layers
03605Highest refractive index not on central axis
G02B 6/03633
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
02Optical fibre with cladding ; with or without a coating
036core or cladding comprising multiple layers
03616Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
03622having 2 layers only
03633arranged - -
H01S 3/06708
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
06708Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
H01S 3/06729
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
06708Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
06729Peculiar transverse fibre profile
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 3/094007
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
094007Cladding pumping, i.e. pump light propagating in a clad surrounding the active core
Applicants
  • POLAROID CORPORATION [US/US]; 549 Technology Square Cambridge, MA 02139-3589, US
Inventors
  • MUENDEL, Martin, H.; US
Agents
  • STECEWYCZ, Joseph; Polaroid Corporation 549 Technology Square Cambridge, MA 02139-3589, US
Priority Data
08/283,22629.07.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL FIBER STRUCTURE FOR EFFICIENT USE OF PUMP POWER
(FR) STRUCTURE DE FIBRE OPTIQUE CONÇUE POUR UNE UTILISATION EFFICACE DE LA PUISSANCE DE LA POMPE
Abstract
(EN)
An optical fiber (130) structure for use in gain applications which comprises at least one core (134), selectively doped with an active gain species, and an inner cladding (132) surrounding the core, where the inner cladding serves the purpose of receiving multimode pump energy from an external power source, confining this energy, and transferring the energy into the core by means of repeated interactions between the energy and the active dopant within the core as the pump energy propagates along the length of the fiber structure. The cross-sectional shape of the inner cladding is in the form of a non-rectangular, convex polygon so that the propagating pump energy is induced to form an essentially uniform radiation field in which the various radiation modes comprising the pump energy are isotropically distributed.
(FR)
Une structure de fibre optique (130) s'utilisant dans des applications de gain comprend au moins une âme(134), dopée sélectivement par une espèce de gain actif, et une gaine interne (132) entourant l'âme et qui sert à réceptionner une énergie de pompage multimode provenant d'une source de puissance extérieure, à confiner cette énergie et à la transférer dans l'âme au moyen d'interactions répétées entre l'énergie et le dopant actif se trouvant à l'intérieur de l'âme au moment où l'énergie de la pompe se propage sur la longueur de la structure fibreuse. La configuration transversale du gainage interne se présente sous la forme d'un polygone convexe, non rectangulaire de sorte que l'énergie qui se propage est induite sous forme d'un champ de rayonnement essentiellement uniforme dans lequel les divers modes de rayonnement renfermant l'énergie de la pompe sont répartis de manière isotropique.
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