JP6008815B2 - 大モード面積でマルチモードの利得生成光ファイバを用いる高パワー光学装置 - Google Patents
大モード面積でマルチモードの利得生成光ファイバを用いる高パワー光学装置 Download PDFInfo
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- JP6008815B2 JP6008815B2 JP2013212409A JP2013212409A JP6008815B2 JP 6008815 B2 JP6008815 B2 JP 6008815B2 JP 2013212409 A JP2013212409 A JP 2013212409A JP 2013212409 A JP2013212409 A JP 2013212409A JP 6008815 B2 JP6008815 B2 JP 6008815B2
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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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
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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
- G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
- G02B6/02009—Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres
- G02B6/02014—Effective area greater than 60 square microns in the C band, i.e. 1530-1565 nm
- G02B6/02019—Effective area greater than 90 square microns in the C band, i.e. 1530-1565 nm
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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
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2552—Splicing of light guides, e.g. by fusion or bonding reshaping or reforming of light guides for coupling using thermal heating, e.g. tapering, forming of a lens on light guide ends
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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
- G02B6/24—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
-
- 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
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Optical Couplings Of Light Guides (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Description
本発明を詳細に述べる前に、まず図1に戻ると、図1は、光源14から発する信号光(λs)をポンプ光(λp)がGPF12の中で吸収されると同時に増幅するLMAでマルチモードのGPF12を備える光増幅器(OA:optical amplifier)10を示している。さらに具体的には、典型的には異なる波長を有する信号光およびポンプ光は、それぞれ別個の典型的には標準の入力光ファイバ24および26を介して波長分割マルチプレクサ(WDM)18へ伝送される。WDM18は、信号およびポンプ光をGPF12のコアの中に結合される典型的には標準の入力ファイバ22上へ多重化する。入力ファイバ22、24および26は、小さなコア面積のシングル・モード・ファイバであってよく、または入力ファイバ22、24および26はより大きなコア面積のマルチモード・ファイバであってよく、しかしいずれにしてもファイバは、好ましくは信号およびポンプ光が同じシングル横モード(例えば基本モード)で伝播するように設計される。代替として、ポンプ光は、他のモードで伝播してもよく、すなわち、ポンプ光のモード群が少なくともシングル・モードの信号光を含むならば、ポンプ光はいくらかマルチモード化されてよい。
Claims (11)
- シングル横モードの信号光を伝播するように構成される第1のコア領域を含む入力ファイバと、
第2のコア領域および前記第2のコア領域を囲むクラッド領域を有するマルチモード利得生成光ファイバを含み、前記第2のコア領域の断面積が350μm2を超えると共に前記第1のコア領域の断面積を超え、前記第2のコア領域は、前記ポンプ光が前記第2のコア領域に結合され前記第2のコア領域の中で吸収されるときにその中で伝播する前記信号光に利得を与えるように構成され、さらに、
前記第2のコア領域の中にだけ様々な角度で結合され、高次モードを励起する前記ポンプ光の複数の高輝度光源と、
前記第2のコア領域内で、シングル横モードの前記信号光および効果的に前記第2のコア領域を満たす高次モードの前記ポンプ光を伝播するように構成される前記利得生成ファイバとを含むことを特徴とする高パワー光ファイバ装置。 - 複数の前記ポンプ光源が実質的に同じ波長でポンプ光を発生させることを特徴とする請求項1に記載の装置。
- 複数の前記ポンプ光源が異なる波長でポンプ光を発生させることを特徴とする請求項1に記載の装置。
- 前記信号光が1500〜1600nmの範囲の波長を有し、前記ポンプ光が1480〜1490nmの波長を有することを特徴とする請求項2に記載の装置。
- 前記第2のコア領域内を前記信号光が基本横モードで伝播し、前記第2のコア領域内で前記ポンプ光が複数の高次モードで伝播することを特徴とする請求項1に記載の装置。
- 前記信号光を前記第2のコア領域の中に直接結合するモードサイズエクスパンダをさらに含むことを特徴とする請求項1に記載の装置。
- 前記信号およびポンプ光を前記モードサイズエクスパンダの中に光学的に結合する結合器をさらに含み、前記結合器が、前記信号光を運ぶ中心ファイバセグメントと、前記中心ファイバセグメントに関して様々な角度に位置する複数の周辺ファイバセグメントとを含み、前記複数の周辺ファイバセグメントが前記ポンプ光を運び、各前記セグメントが、前記モードサイズエクスパンダに結合される領域の断面積を減少させるように先細りであることを特徴とする請求項6に記載の装置。
- 前記第2のコア面積が800μm2を超えることを特徴とする請求項1に記載の装置。
- 前記利得生成ファイバがシングルクラッドファイバを含むことを特徴とする請求項1に記載の装置。
- 前記装置が光増幅器を含むことを特徴とする請求項1に記載の装置。
- 前記装置がレーザを含むことを特徴とする請求項1に記載の装置。
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US11/698,541 US7916386B2 (en) | 2007-01-26 | 2007-01-26 | High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers |
US11/698541 | 2007-01-26 |
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JP2008014379A Division JP5437579B2 (ja) | 2007-01-26 | 2008-01-25 | 大モード面積でマルチモードの利得生成光ファイバを用いる高パワー光学装置 |
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JP2014030052A JP2014030052A (ja) | 2014-02-13 |
JP6008815B2 true JP6008815B2 (ja) | 2016-10-19 |
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JP2008014379A Active JP5437579B2 (ja) | 2007-01-26 | 2008-01-25 | 大モード面積でマルチモードの利得生成光ファイバを用いる高パワー光学装置 |
JP2013212409A Expired - Fee Related JP6008815B2 (ja) | 2007-01-26 | 2013-10-10 | 大モード面積でマルチモードの利得生成光ファイバを用いる高パワー光学装置 |
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US (1) | US7916386B2 (ja) |
EP (1) | EP1950852A3 (ja) |
JP (2) | JP5437579B2 (ja) |
CN (1) | CN101266379B (ja) |
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-
2007
- 2007-01-26 US US11/698,541 patent/US7916386B2/en active Active
-
2008
- 2008-01-23 EP EP08001212A patent/EP1950852A3/en not_active Withdrawn
- 2008-01-25 CN CN2008100963013A patent/CN101266379B/zh active Active
- 2008-01-25 JP JP2008014379A patent/JP5437579B2/ja active Active
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Also Published As
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US7916386B2 (en) | 2011-03-29 |
US20080180787A1 (en) | 2008-07-31 |
JP2008187176A (ja) | 2008-08-14 |
CN101266379A (zh) | 2008-09-17 |
JP2014030052A (ja) | 2014-02-13 |
EP1950852A2 (en) | 2008-07-30 |
EP1950852A3 (en) | 2008-09-24 |
JP5437579B2 (ja) | 2014-03-12 |
CN101266379B (zh) | 2011-10-19 |
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