WO2004059807A1 - Source laser de puissance a fibres optiques a source de pompage unique - Google Patents
Source laser de puissance a fibres optiques a source de pompage unique Download PDFInfo
- Publication number
- WO2004059807A1 WO2004059807A1 PCT/EP2003/051031 EP0351031W WO2004059807A1 WO 2004059807 A1 WO2004059807 A1 WO 2004059807A1 EP 0351031 W EP0351031 W EP 0351031W WO 2004059807 A1 WO2004059807 A1 WO 2004059807A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- source
- fibers
- fiber
- power
- dichroic
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3632—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means
- G02B6/3636—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means the mechanical coupling means being grooves
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3648—Supporting carriers of a microbench type, i.e. with micromachined additional mechanical structures
- G02B6/3652—Supporting carriers of a microbench type, i.e. with micromachined additional mechanical structures the additional structures being prepositioning mounting areas, allowing only movement in one dimension, e.g. grooves, trenches or vias in the microbench surface, i.e. self aligning supporting carriers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3664—2D cross sectional arrangements of the fibres
- G02B6/3668—2D cross sectional arrangements of the fibres with conversion in geometry of the cross section
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/1083—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering using parametric generation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/1086—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering using scattering effects, e.g. Raman or Brillouin effect
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
Definitions
- the present invention relates to a fiber laser power source with a single pumping source.
- solid state laser sources with a power greater than 1 kW is important for many industrial applications.
- Such sources have already been produced from Nd: YAG bars pumped by laser diodes.
- Two types of architecture make it possible to achieve such performances: those with a single oscillator and those called "MOPA" configuration which consist of a master oscillator and amplifiers.
- Continuous powers greater than 100 W can be obtained from a single single-mode amplifier fiber.
- the power is then limited by the damage thresholds of the fiber.
- Using a multimode fiber with a large diameter would make it possible to further increase the power of the laser source and reach, for example, 1 kW.
- the multimode beam from the fiber can then be converted to a single-mode beam by means of a non-linear two-wave interaction in a medium with index variation or a fixed holographic component. Considering an optical-optical conversion efficiency of around 30%, to obtain 1 kW, it is necessary to pump the doped fiber with a laser diode pumping source producing a power of at least 3 kW.
- Longitudinal pumping (that is to say along the axis of the fiber) remains the simplest way to pump the amplifying laser fibers.
- a typical double-core fiber having a doped core diameter of 50 ⁇ m and an undoped core of diameter 500 ⁇ m, with a numerical aperture of 0.4. It is then possible to pump such a fiber longitudinally with a power of up to 500 W and supplied by a pumping source composed of stacks of arrays of laser diodes and a beam shaping optic. If we wanted to have a pumping power of 3 kW, the diameter of the undoped part of the amplifying fiber should be 6 times larger than in the example just cited, which would be completely unrealistic in the current state of the art.
- the subject of the present invention is a solid laser source of MOPA type capable of delivering a power of at least 1 kW using means currently available, without risk of destruction of its components, and which is as inexpensive as possible.
- the laser source according to the invention comprises a single pumping source illuminating, through a single focusing optic, followed by a dichroic blade, one end of a set of N optical fibers grouped together, these fibers each comprising a first doped core surrounded by a second undoped core, and being coupled with N single-mode fibers, the other ends of which are connected, with one end of an undoped auxiliary fiber, by a coupler 1 to N + 1, to an oscillating laser at the desired emission wavelength for the power source, the other end of the auxiliary fiber being followed by an optical imaging device at a non-linear energy transfer medium positioned opposite from the return face of the dichroic plate, the reference beam coming from the auxiliary fiber being amplified by the energy transfer medium by the amplified energy coming from the dichroic plate.
- FIG. 1 is a block diagram of a laser power source according to the invention
- FIG. 2 is a partial detailed diagram of the amplifying optical fibers used in the source of FIG. 1,
- FIG. 3 is a simplified perspective view of a tool which can be used to make the junctions of the two-core fibers with undoped single-mode fibers, to produce the source of FIG. 1, and
- FIG. 4 is a detailed block diagram of the mode conversion device of the source of Figure 1.
- the power laser source represented in FIG. 1 comprises a single pumping source 1 composed, for example, of several laser diodes, which is imaged by a single focusing optics 2 on the plane front face 3 formed by the aligned ends of a set 4 of N optical fibers with two hearts welded together at this end.
- each of the N optical fibers of the assembly 4 comprises a central core 5 doped in a conventional manner and surrounded by a concentric core 5a which is undoped.
- Such fibers can be standard telecommunications components, or, more advantageously, fibers with a large core capable of accepting high powers.
- N two-core optical fibers are grouped so as to form a compact fiber bundle with a substantially circular outline and joined or welded in a protective and retaining sheath 7.
- the front face of the set of fibers thus welded together is polished so as to form the flat surface 3 on which the source 1 is imaged to pump the undoped hearts of these fibers longitudinally.
- the power of the pump is distributed in a substantially homogeneous manner in these undoped and doped hearts.
- Each of the N two-core fibers is coupled (as explained with reference to FIG. 3) to a single-mode fiber 6.
- the other ends of the fibers 6 are connected, at the same time as an undoped single-mode auxiliary fiber 8, to the output of a coupler 9 at the input of which a single fiber 10 is connected (the coupler 9 is therefore of the " 1 to N + 1 ").
- the fiber 10 is connected at its other end to an oscillator 11, for example of the single-mode optical fiber type.
- the wavelength ⁇ ⁇ of the oscillator 11 is equal to the wavelength that the power wave produced at the output of the device of FIG. 1 must have, and it is different from the wavelength ⁇ p pumping the source 1.
- the other end of the optical fiber 8 is placed at the focus of a collimating optic 12 which thus produces a collimated single-mode beam 13, which serves as a reference beam, as explained below.
- the beam 13 is sent to a first face of a non-linear crystal 14, of the type with index variation for example. Furthermore, there is between the optics 2 and the face 3 of the optical fibers a dichroic blade 15 inclined at 45 ° relative to the axis 2a of the optic 2. The blade 15 is produced so as to be highly reflective at the wavelength ⁇ ⁇ and highly transmissive at the wavelength ⁇ p .
- axis 15a perpendicular to axis 2a (it is perpendicular to axis 2a in this example, but this is not necessary), and cutting this axis 2a on the face of the blade 15 facing towards fiber assembly 4, there is a focusing optic 16 focusing the beam 15b which it receives from the blade 15 on one of the faces of the crystal 14.
- An insulator 17 is inserted in the path of the fiber 10 which prevents any harmful transmission power to the oscillator 11.
- an isolator can be inserted on each of the fibers 6. This isolator 17 does not lets pass that the wavelength ⁇ ⁇ in the direction 11 to 9 and blocks that of the pump in the opposite direction (from 9 to 11).
- the device described above operates in the following manner.
- the pumping beam is transmitted almost without losses by the blade 15 towards the front face 3 of the set of fibers 4 to pump their doped and undoped hearts longitudinally.
- the N undoped fibers 6 receive the wavelength ⁇ e -
- the two-core fibers collect the optical wave at the level of the doped heart at this wavelength ⁇ ⁇ and amplify it to send a beam at this wavelength ⁇ ⁇ to the plate 15.
- the latter being highly reflective at ⁇ ⁇ , reflects this beam towards the optics 16 which concentrates it on the crystal 14, in which it combines with the beam reference 13 of low power to transfer the power it carries, This amplified energy is transported by the output beam 14a of the crystal 14.
- This beam 14a is an amplified single-mode beam.
- the transfer of energy in the crystal 14 taking place without phase transfer, the amplified beam 14a has the same spatial characteristics as the reference beam 13 of which it retains the spatial quality of coherence.
- Crystal 14 is either a photorefractive crystal such as LiNbO 3 , BaTiO 3 , SBN or a transparent nonlinear medium in which third order nonlinearities occur, such as the Brillouin effect or the Kerr effect.
- FIG. 3 shows a tool 18 making it possible to inject the N single-mode fibers towards the N multimode amplifying fibers.
- This tool essentially comprises two anvils 19 and 20, of rectangular parallelepiped shape, arranged side by side, the upper face of the anvil 19 being slightly higher than that of the anvil 20, these two faces being parallel to each other.
- N number of notches in the shape of "V" of dimensions appropriate to the respective diameters of the fibers 6 and 23, these notches being perpendicular to the junction plane of the two anvils.
- the notches made in the anvil 19 are referenced 21, and those made in the anvil 20 are referenced 22.
- each notch 21 is in the same plane perpendicular to the upper faces of the two anvils as the axis of each notch 22 corresponding.
- a fiber 6 (comprising a core undoped 6a surrounded by a sheath 6b).
- each notch 22 there is the end of a multimode fiber 23, each of these fibers consisting of a doped heart 24, surrounded by an undoped heart 25, itself surrounded by a sheath 26.
- the dimensions of the notches 21 and 22 and their relative positions are such that the axes of the fibers 23 are in the extension of the axes of the corresponding fibers 6.
- the fibers 6 are then injected towards the fibers 23 coaxially, or are connected to them using N appropriate connectors.
- the mode conversion crystal 14 generally works with linearly polarized beams.
- the beam, at the wavelength ⁇ ⁇ leaving the face 3 of the assembly 4 in the direction of the blade 15, and formed of N amplified beams from the multimode fibers is, in principle, depolarized.
- a polarization splitter is used to separate the two vertical and horizontal linear polarization components.
- a cube 27 separating polarizations is then placed on the path of the beam 15b.
- a cube 28 is directed opposite the 45 ° inclined surface of the cube 27 (on an axis perpendicular to the axis 15a of the beam 15b) so as to return towards the crystal 14, in the area of direct incidence of the beam 15b, the beam (vertically polarized in the present case) which it receives from the cube 27.
- This mirror 28 is followed by a half-wave plate 29 (as a variant, this plate can be placed on the path direct from beam 15a, between cube 27 and crystal 14).
- the blade 29 rotates the polarization of the beam passing through it by 90 °, the vertical polarization of which then becomes horizontal.
- the direct beam 15a from the cube 27 is also horizontally polarized. Consequently, the two beams arriving on the crystal 14 (coming from the cube 27 and the blade 29) have the same polarization, and therefore do not risk disturbing the operation of this crystal.
- N 6. Fibers of 50 ⁇ m in diameter of doped core and 500 ⁇ m in outside diameter of undoped core (numerical aperture ⁇ 0.38). Doping at Yb (fiber with gain at the emission wavelength of
- Crystal 14 operating at the wavelength of 1.053 ⁇ m, in
- BaTiO 3 doped with Rhodium or LiNbO 3 isoped with Rhodium or LiNbO 3 .
- Oscillator Yb fiber laser, delivering a power ranging from 1 to 10 W.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Lasers (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003303404A AU2003303404A1 (en) | 2002-12-31 | 2003-12-16 | Power laser source with optical fibres having a single pump source |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0216904A FR2849545B1 (fr) | 2002-12-31 | 2002-12-31 | Source laser de puissance a fibres optiques a source de pomp age unique |
FR0216904 | 2002-12-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004059807A1 true WO2004059807A1 (fr) | 2004-07-15 |
Family
ID=32480323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/051031 WO2004059807A1 (fr) | 2002-12-31 | 2003-12-16 | Source laser de puissance a fibres optiques a source de pompage unique |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2003303404A1 (fr) |
FR (1) | FR2849545B1 (fr) |
WO (1) | WO2004059807A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI575828B (zh) * | 2015-01-23 | 2017-03-21 | 羅光英國有限公司 | 藉由均勻抽吸放大介質之雷射光束放大法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0571126A2 (fr) * | 1992-05-12 | 1993-11-24 | Hughes Aircraft Company | Appareil et procédé pour l'amplification d'énergie optique utilisants le couplage de deux faisceaux |
US5689522A (en) * | 1995-10-02 | 1997-11-18 | The Regents Of The University Of California | High efficiency 2 micrometer laser utilizing wing-pumped Tm3+ and a laser diode array end-pumping architecture |
-
2002
- 2002-12-31 FR FR0216904A patent/FR2849545B1/fr not_active Expired - Lifetime
-
2003
- 2003-12-16 WO PCT/EP2003/051031 patent/WO2004059807A1/fr not_active Application Discontinuation
- 2003-12-16 AU AU2003303404A patent/AU2003303404A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0571126A2 (fr) * | 1992-05-12 | 1993-11-24 | Hughes Aircraft Company | Appareil et procédé pour l'amplification d'énergie optique utilisants le couplage de deux faisceaux |
US5689522A (en) * | 1995-10-02 | 1997-11-18 | The Regents Of The University Of California | High efficiency 2 micrometer laser utilizing wing-pumped Tm3+ and a laser diode array end-pumping architecture |
Non-Patent Citations (1)
Title |
---|
BRIGNON A ET AL: "Beam cleanup of a multimode yb-doped fiber amplifier with an infrared sensitive Rh:BaTiO3 crystal", CONFERENCE ON LASERS AND ELECTRO-OPTICS. (CLEO 2001). TECHNICAL DIGEST. POSTCONFERENCE EDITION. BALTIMORE, MD, MAY 6-11, 2001, TRENDS IN OPTICS AND PHOTONICS. (TOPS), US, WASHINGTON, WA: OSA, US, vol. 56, 6 May 2001 (2001-05-06), pages 220 - 221, XP010559759, ISBN: 1-55752-662-1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI575828B (zh) * | 2015-01-23 | 2017-03-21 | 羅光英國有限公司 | 藉由均勻抽吸放大介質之雷射光束放大法 |
Also Published As
Publication number | Publication date |
---|---|
AU2003303404A1 (en) | 2004-07-22 |
FR2849545A1 (fr) | 2004-07-02 |
FR2849545B1 (fr) | 2005-04-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0401064B1 (fr) | Lasers de puissance pompés par diodes lasers | |
FR2655435A1 (fr) | Dispositif d'addition coherente de faisceaux laser. | |
EP0390662B1 (fr) | Générateur laser de puissance avec contrôle de la direction d'émission du faisceau de sortie | |
JPH11503575A (ja) | 外部キャビティ大面積のレーザダイオードを受動光学キャビティに結合する技術 | |
EP3885827A1 (fr) | Guide d'onde multimode configuré pour générer une radiation monomode à partir d'une radiation monomode | |
EP2147487B1 (fr) | Laser a puce pulse | |
EP0452838A1 (fr) | Dispositif de conjugaison de phase optique avec guide de lumière pour combinaison de plusieurs rayons lumineux | |
EP0847115B1 (fr) | Dispositif amplificateur de lumière à deux faisceaux incidents | |
FR2768267A1 (fr) | Amplificateur optique | |
FR2759208A1 (fr) | Dispositif de controle du pointage et de la focalisation des chaines laser sur une cible | |
WO2004059807A1 (fr) | Source laser de puissance a fibres optiques a source de pompage unique | |
FR2818814A1 (fr) | Source laser | |
EP2206011B1 (fr) | Source laser comportant un dispositif de balayage angulaire | |
EP0977327A1 (fr) | Laser en espace libre avec sortie fibre autoalignée | |
EP0637109A1 (fr) | Amplificateur optique à fibre optique en verre fluoré dopé et procédé de fabrication de cet amplificateur | |
EP0180509B1 (fr) | Procédé et dispositif de modulation de phase optique contrôlable stable | |
FR2885743A1 (fr) | Dispositif de pompage optique | |
WO2003055016A2 (fr) | Dispositif d'amplification et de mise en phase pour sources laser de puissance | |
EP1212814A1 (fr) | Laser pompe et milieu laser optimise | |
WO2005015698A1 (fr) | Source laser de puissance a grande finesse spectrale | |
FR2767996A1 (fr) | Amplificateur d'impulsions optiques | |
CN1186662C (zh) | 多波长光学参量高功率光纤放大装置 | |
EP1030412B1 (fr) | Amplificateur optique | |
FR2756110A1 (fr) | Oscillateur optique a agilite de pointage et source laser utilisant cet oscillateur optique | |
FR2739732A1 (fr) | Dispositif d'amplification optique |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
122 | Ep: pct application non-entry in european phase | ||
NENP | Non-entry into the national phase |
Ref country code: JP |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: JP |