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1. WO2018136668 - CONTROL OF HEATING IN ACTIVE DOPED OPTICAL FIBER

Publication Number WO/2018/136668
Publication Date 26.07.2018
International Application No. PCT/US2018/014286
International Filing Date 18.01.2018
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
CPC
H01S 3/06733
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
06733Fibre having more than one cladding
H01S 3/06745
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
06745Tapering of the fibre, core or active region
H01S 3/06754
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
06754Fibre amplifiers
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
H01S 3/10013
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
10007in optical amplifiers
10013by controlling the temperature of the active medium
H01S 3/13017
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
1301in optical amplifiers
13017by controlling the temperature of the active medium
Applicants
  • MASSACHUSETTS INSTITUTE TECHNOLOGY [US]/[US]
Inventors
  • REEVES-HALL, Peter C.
Agents
  • LOBER, Theresa A.
Priority Data
62/448,01719.01.2017US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CONTROL OF HEATING IN ACTIVE DOPED OPTICAL FIBER
(FR) COMMANDE DE CHAUFFAGE DANS UNE FIBRE OPTIQUE DOPÉE ACTIVE
Abstract
(EN)
Herein is provided a fiber length including a doped fiber core extending over the fiber length. First and second cladding regions radially surround the core. At least one pump light input site is arranged to accept input pump light into the first cladding region, A low-absorption length over which the first cladding region has a first cross- sectional geometry produces a first level of absorption of input pump light from the first cladding 'region to the core, extending from a pump light input site for an extent over which the doped core can absorb at least about 10% of input pump light from the first cladding region. A high absorption section over which the first cladding region has a second cross-sectional geometry produces a second level of absorption of input pump light from the first cladding region to the core, greater than the first level of absorption of input pump light.
(FR)
L'invention concerne une longueur de fibre comprenant une âme de fibre dopée s'étendant sur la longueur de fibre. Des première et seconde régions de revêtement entourent radialement l'âme. Au moins un site d'entrée de lumière de pompe est conçu pour accepter une lumière de pompe d'entrée dans la première région de revêtement. Une longueur d'absorption faible sur laquelle la première région de revêtement a une première géométrie de section transversale produit un premier niveau d'absorption de lumière de pompe d'entrée depuis la première région de revêtement vers l'âme, s'étendant à partir d'un site d'entrée de lumière de pompe sur une étendue sur laquelle l'âme dopée peut absorber au moins environ 10 % de la lumière de pompe d'entrée provenant de la première région de revêtement. Une section d'absorption élevée sur laquelle la première région de revêtement a une seconde géométrie de section transversale produit un second niveau d'absorption de lumière de pompe d'entrée depuis la première région de revêtement vers l'âme, supérieur au premier niveau d'absorption de lumière de pompe d'entrée.
Also published as
Latest bibliographic data on file with the International Bureau