JP5598882B2 - 光ファイバ増幅器 - Google Patents
光ファイバ増幅器 Download PDFInfo
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- JP5598882B2 JP5598882B2 JP2013520621A JP2013520621A JP5598882B2 JP 5598882 B2 JP5598882 B2 JP 5598882B2 JP 2013520621 A JP2013520621 A JP 2013520621A JP 2013520621 A JP2013520621 A JP 2013520621A JP 5598882 B2 JP5598882 B2 JP 5598882B2
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- 239000013307 optical fiber Substances 0.000 title claims description 133
- 230000003287 optical effect Effects 0.000 claims description 183
- 230000008878 coupling Effects 0.000 claims description 94
- 238000010168 coupling process Methods 0.000 claims description 94
- 238000005859 coupling reaction Methods 0.000 claims description 94
- 230000005284 excitation Effects 0.000 claims description 64
- 238000005086 pumping Methods 0.000 claims description 44
- 238000005253 cladding Methods 0.000 claims description 42
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 33
- 238000001228 spectrum Methods 0.000 description 13
- 230000003321 amplification Effects 0.000 description 9
- 238000003199 nucleic acid amplification method Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 230000001902 propagating effect Effects 0.000 description 5
- 239000003550 marker Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 101150071746 Pbsn gene Proteins 0.000 description 1
- 101100028001 Schizosaccharomyces pombe (strain 972 / ATCC 24843) omh5 gene Proteins 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
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- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02042—Multicore optical fibres
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- 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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06729—Peculiar transverse fibre profile
- H01S3/06737—Fibre having multiple non-coaxial cores, e.g. multiple active cores or separate cores for pump and gain
-
- 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
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
-
- 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
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
- H01S3/094007—Cladding pumping, i.e. pump light propagating in a clad surrounding the active core
-
- 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
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2848—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers having refractive means, e.g. imaging elements between light guides as splitting, branching and/or combining devices, e.g. lenses, holograms
-
- 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
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
- G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
- G02B6/2937—In line lens-filtering-lens devices, i.e. elements arranged along a line and mountable in a cylindrical package for compactness, e.g. 3- port device with GRIN lenses sandwiching a single filter operating at normal incidence in a tubular package
-
- 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
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
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- 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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0078—Frequency filtering
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- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
- H01S3/094019—Side pumped fibre, whereby pump light is coupled laterally into the fibre via an optical component like a prism, or a grating, or via V-groove coupling
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/09408—Pump redundancy
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- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
- H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
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- 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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1608—Solid materials characterised by an active (lasing) ion rare earth erbium
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- 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
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Lasers (AREA)
- Optical Couplings Of Light Guides (AREA)
Description
図1は、本発明の実施の形態1に係る光結合構造の模式図である。この光結合構造10は、端面が対向して配置されたマルチコア光ファイバ1a、1bと、マルチコア光ファイバ1a、1bのそれぞれが挿通されたフェルール2a、2bと、第1レンズであるレンズ3と、第2レンズであるレンズ4と、光機能部品5とで構成されている。
図3は、本発明の実施の形態2に係る光結合構造の模式図である。この光結合構造10Aは、図1に示す実施の形態1に係る光結合構造10において、レンズ3、4をそれぞれ屈折率分布型(Gradient Index:GRIN)レンズ3A、4Aに置き換えたものである。
図6は、本発明の実施の形態3に係る光結合構造の模式図である。この光結合構造20は、端面が対向して配置されたマルチコア光ファイバ1a、21bと、マルチコア光ファイバ1a、21bのそれぞれが挿通されたフェルール2a、22bと、第1レンズであるレンズ3と、第2レンズであるレンズ4と、光機能部品5と、光機能部品である光フィルタ28と、フェルール22bに挿通された励起光導入光ファイバ27bとで構成されている。
図7は、実施の形態4に係る光結合構造の模式図である。図7に示す光結合構造20Aは、図6に示す実施の形態3に係る光結合構造20において、フェルール22bをフェルール22Abに置き換えている。フェルール22Abには、マルチコア光ファイバ21bと複数の励起光導入光ファイバ27bとが、それぞれの端面がフェルール22Abの端面と同一面上に位置する状態に挿通固定されている。さらに、光フィルタ28が励起光導入光ファイバ27bと同じ数だけ設けられている。
図9は、実施の形態5に係る光結合構造の模式図である。図9に示す光結合構造20Bは、図7に示す実施の形態4に係る光結合構造20Aにおいて、フェルール22Abをフェルール22Bbに置き換え、複数の光フィルタ28を1つの光フィルタ28Bに置き換えた構成を有する。
図11は、実施の形態4に係る光結合構造の模式図である。図11に示す光結合構造20Cは、図6に示す実施の形態3に係る光結合構造20において、レンズ3、4をそれぞれGRINレンズ3A、4Aに置き換えたものである。
図12は、本発明の実施の形態7に係る光ファイバ増幅器の模式図である。図12に示すように、クラッドポンプ型の光ファイバ増幅器100は、光アイソレータ101、102と、WDM(Wavelength division Multiplexing)カプラ103、104と、励起LD(Laser Diode)105と、光結合構造130と、マルチコアEDF(Erbium-Doped optical Fiber)106と、光結合構造140と、WDMカプラ107、108と、光アイソレータ109、110と、を備えている。
1aa、1ba、21ba コア部
1ab、1bb クラッド部
2a、2b、22b、22Ab、22Bb フェルール
3、4 レンズ
3A、4A、4B GRINレンズ
5 光機能部品
10、10A、20、20A、20B、20C、130、140 光結合構造
21bb 内側クラッド部
21bc 外側クラッド部
22Bba 端面
27b 励起光導入光ファイバ
27ba 励起光導入コア部
27bb クラッド部
28、28B 光フィルタ
30 励起光源
100 光ファイバ増幅器
101、102、109、110 光アイソレータ
103、104、107、108 WDMカプラ
105 励起LD
106、131d、141d マルチコアEDF
131a、131b、131c、141a、141b、1003、1004 光ファイバ
133a、133b、133c、134、143a、143b、144 レンズ
200 光選択スイッチ
1000 測定系
1001 信号光源
1002 3dBカプラ
1005 バンドパス光フィルタ
1006 可変光減衰器
1007 受光器
LS1、LS2 波長可変光源
OSA 光スペクトラムアナライザ
P1、P2、P31 励起光
S1、S2、S31、S32 信号光
Claims (6)
- 複数のコア部と複数のコア部とが光結合される光結合構造を備える光ファイバ増幅器であって、
複数の光を出力する複数の第1コア部と、
前記複数の第1コア部から出力された複数の光を集光またはコリメートする第1レンズと、
前記第1レンズが集光またはコリメートした複数の光を集光する第2レンズと、
前記第2レンズが集光した複数の光がそれぞれ入力される複数の第2コア部と、
前記第1コア部と前記第2コア部との間に配置された光機能部品と、
少なくとも一つの励起光導入コア部と、
を備え、
前記第1レンズおよび前記第2レンズの少なくとも一方は、前記複数の光を一括して集光またはコリメートする1つのレンズで構成されており、
前記複数の第1コア部および前記複数の第2コア部の一方は、希土類元素が添加され、かつマルチコア光ファイバを構成しており、前記マルチコア光ファイバは、前記希土類元素が添加された複数のコア部の外周に形成された内側クラッド部と、前記内側クラッド部の外周に形成された外側クラッド部とを備え、
前記励起光導入コア部は、マルチモード光ファイバである励起光導入光ファイバを構成している
光結合構造と、
前記励起光導入光ファイバに励起光を導入するマルチモード励起光源と、
を備え、前記光機能部品は、前記励起光導入コア部から出力された励起光を反射して前記内側クラッド部に入力させるとともに、前記複数の光と干渉しないように配置されている光フィルタである
ことを特徴とする光ファイバ増幅器。 - 前記第1コア部と前記第2コア部との間で倒立像が形成されるように前記第1レンズと前記第2レンズとが構成されていることを特徴とする請求項1に記載の光ファイバ増幅器。
- 前記第1コア部と前記第2コア部との間で倒立像と正立像が形成されることを特徴とする請求項2に記載の光ファイバ増幅器。
- 前記光フィルタは、前記励起光の光軸が前記マルチコア光ファイバの内側クラッド部の中心軸に対して斜めになるように前記励起光を前記内側クラッド部に入力させることを特徴とする請求項1〜3のいずれか一つに記載の光ファイバ増幅器。
- 前記光フィルタは前記第1レンズと前記第2レンズとの間に配置されていることを特徴とする請求項1〜4のいずれか一つに記載の光ファイバ増幅器。
- 前記第1レンズと前記第2レンズとの間に配置された第2の光機能部品をさらに備えることを特徴とする請求項1〜5のいずれか一つに記載の光ファイバ増幅器。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161497776P | 2011-06-16 | 2011-06-16 | |
US61/497,776 | 2011-06-16 | ||
US201261623267P | 2012-04-12 | 2012-04-12 | |
US61/623,267 | 2012-04-12 | ||
PCT/JP2012/065498 WO2012173271A1 (ja) | 2011-06-16 | 2012-06-18 | 光結合構造および光ファイバ増幅器 |
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JP5598882B2 true JP5598882B2 (ja) | 2014-10-01 |
JPWO2012173271A1 JPWO2012173271A1 (ja) | 2015-02-23 |
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JP2013520621A Active JP5598882B2 (ja) | 2011-06-16 | 2012-06-18 | 光ファイバ増幅器 |
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US (1) | US9140850B2 (ja) |
EP (1) | EP2722697A4 (ja) |
JP (1) | JP5598882B2 (ja) |
CN (1) | CN103620460A (ja) |
WO (1) | WO2012173271A1 (ja) |
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US20150168642A1 (en) | 2015-06-18 |
US9140850B2 (en) | 2015-09-22 |
WO2012173271A1 (ja) | 2012-12-20 |
JPWO2012173271A1 (ja) | 2015-02-23 |
EP2722697A4 (en) | 2015-06-24 |
EP2722697A1 (en) | 2014-04-23 |
CN103620460A (zh) | 2014-03-05 |
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