JP2010518634A - 信号のモードと本質的に同一である高次モードにおける励起 - Google Patents
信号のモードと本質的に同一である高次モードにおける励起 Download PDFInfo
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- 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
- H01S3/06733—Fibre having more than one cladding
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- 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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- 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
- G02B6/02023—Based on higher order modes, i.e. propagating modes other than the LP01 or HE11 fundamental mode
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- 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
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- 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
- H01S3/094038—End pumping
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- 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
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
- G02B6/02085—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the grating profile, e.g. chirped, apodised, tilted, helical
- G02B6/02095—Long period gratings, i.e. transmission gratings coupling light between core and cladding modes
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- G—PHYSICS
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- 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
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
- G02B6/02366—Single ring of structures, e.g. "air clad"
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- G—PHYSICS
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- 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
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical 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
- G02B6/03622—Optical 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 having 2 layers only
- G02B6/03633—Optical 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 having 2 layers only arranged - -
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- G—PHYSICS
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- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
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- H01S2301/00—Functional characteristics
- H01S2301/03—Suppression of nonlinear conversion, e.g. specific design to suppress for example stimulated brillouin scattering [SBS], mainly in optical fibres in combination with multimode pumping
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- H01S2301/00—Functional characteristics
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- 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
- H01S3/06741—Photonic crystal fibre, i.e. the fibre having a photonic bandgap
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- 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
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
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- H01S3/08—Construction or shape of optical resonators or components thereof
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- 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
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- 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
- H01S3/094096—Multi-wavelength pumping
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
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Abstract
Description
この出願は“高次モード増幅器”と題する2007年2月5日に出願された米国特許出願第60/888,114号に対して優先権の利益を主張し、参照のためそのすべてがここに引用される。
115、215 カスケード式ラマン共振器(CRR)
120、220 入力ファイバと利得ドープファイバの接合部
125 信号の基底LP01モード
130 モード除去器
135 モード変換器
145 伝播光
155、250 利得ドープファイバ
160、255 入力ファイバ
205 信号源
210、610 信号光
230 信号モード変換器
235 信号のLP0mモード
240 励起光モード変換器
255 多重化されたLP01モード光
410 ファイバの断面像
420 HOMの近視野像
430 内側のクラッド
440 空気孔
450 シリカの輪
500 屈折率のチャート
510 屈折率プロファイル
520 HOM信号
560 HOM信号、および利得ドープファイバプロファイル
620、720 励起光
Claims (15)
- 信号源と、
高次モード(HOM)信号を伝播する、前記信号源に光学的に結合された利得ドープされた光ファイバと、
前記利得ドープされた光ファイバに光学的に結合された励起光源と、
高次モードを除去する、前記利得ドープされた光ファイバに光学的に結合されたモード除去器と、
前記利得ドープされた光ファイバに刻まれた長周期グレーティング(LPG)とを含み、前記LPGが前記モード除去器と直列に配され、前記LPGが基底モードの信号をHOMに変換するように構成され、そして、前記LPGがさらに基底モードの励起光をHOMに変換するように構成されていることを特徴とする装置。 - 利得ドープされた領域を有する光ファイバを含み、前記光ファイバはさらに前記利得ドープされた領域の半径方向外側に配される外側クラッドを有し、そして前記利得ドープされた領域が高次モード(HOM)信号を伝播するものであり、さらに、
高次モードを除去する、前記光ファイバに光学的に結合されたモード除去器と、
前記信号を第一の高次モード(HOM)に変換する、前記光ファイバに光学的に結合された信号モード変換器と、
励起光を第二のHOMに変換する、前記光ファイバに光学的に結合された励起モード変換器とを含み、前記第二のHOMが本質的に第一のHOMと同一であることを特徴とする装置。 - 前記信号モード変換器と前記励起モード変換器とが前記光ファイバに直列に配されていることを特徴とする請求項2に記載の装置。
- 前記信号モード変換器と前記励起モード変換器とが前記光ファイバのおおよそ同じ位置に配されていることを特徴とする請求項2に記載の装置。
- 前記信号モード変換器が一組の長周期グレーティング(LPG)であり、前記励起モード変換器が同じ組のLPGであり、前記LPGが基底モードの信号をHOMに変換するように適合され、そして、前記LPGがさらに前記励起光をHOMに変換するように整合されることを特徴とする請求項4に記載の装置。
- 前記信号モード変換器が前記信号をHOMに変換するように整合される長周期グレーティング(LPG)の第一の組であり、前記励起モード変換器が前記励起(光)をHOMに変換するように整合される長周期グレーティング(LPG)の第二の組であり、そして、前記LPGの第二の組が前記LPGの第一の組に直列に配されることを特徴とする請求項4に記載の装置。
- 信号を射出する手段と、
光ファイバを励起する手段とをさらに含むことを特徴とする請求項2に記載の装置。 - 前記光ファイバに光学的に結合される信号源と、
前記光ファイバに光学的に結合される励起光源とをさらに含むことを特徴とする請求項2に記載の装置。 - 前記励起光源が前記光ファイバの前記利得ドープされた領域に励起光を射出するように構成されることを特徴とする請求項8に記載の装置。
- 前記励起光源がファイバレーザであることを特徴とする請求項8に記載の装置。
- 前記ファイバレーザがカスケード式ラマン共振器(CRR)であることを特徴とする請求項10に記載の装置。
- 信号を第一の高次モード(HOM)に変換し、励起光を第二のHOMに変換し、そして前記第二のHOMが前記第一のHOMと本質的に同一であることを特徴とする方式。
- 前記信号を変換するステップが前記長周期グレーティング(LPG)の第一の組を通して前記信号を伝播するステップからなることを特徴とする請求項12に記載の方式。
- 前記励起光を変換するステップが前記LPGの第一の組を通して前記励起光を伝播するステップからなることを特徴とする請求項13に記載の方式。
- 前記励起光を変換するステップがLPGの第二の組を通して前記励起光を伝播するステップからなり、前記LPGの第二の組が前記LPGの第一の組に直列に配されることを特徴とする請求項13に記載の方式。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US88811407P | 2007-02-05 | 2007-02-05 | |
PCT/US2008/053071 WO2008097988A2 (en) | 2007-02-05 | 2008-02-05 | Pumping in a higher- order mode that is substantially identical to a signal mode |
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JP2010518634A true JP2010518634A (ja) | 2010-05-27 |
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Application Number | Title | Priority Date | Filing Date |
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JP2009549206A Active JP5484073B2 (ja) | 2007-02-05 | 2008-02-05 | 光ファイバの利得ドープ領域の選択的励起 |
JP2009549199A Active JP5250564B2 (ja) | 2007-02-05 | 2008-02-05 | 高次モード(hom)信号の伝播における有効断面積の連続的な増加 |
JP2009549198A Active JP5276021B2 (ja) | 2007-02-05 | 2008-02-05 | 光ファイバの誘電破壊の防止 |
JP2009549201A Pending JP2010518632A (ja) | 2007-02-05 | 2008-02-05 | 信号のモードとは異なる高次モードにおける励起 |
JP2009549207A Pending JP2010518634A (ja) | 2007-02-05 | 2008-02-05 | 信号のモードと本質的に同一である高次モードにおける励起 |
JP2009549204A Active JP5250565B2 (ja) | 2007-02-05 | 2008-02-05 | 光ファイバの分割された利得ドーピング |
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JP2009549206A Active JP5484073B2 (ja) | 2007-02-05 | 2008-02-05 | 光ファイバの利得ドープ領域の選択的励起 |
JP2009549199A Active JP5250564B2 (ja) | 2007-02-05 | 2008-02-05 | 高次モード(hom)信号の伝播における有効断面積の連続的な増加 |
JP2009549198A Active JP5276021B2 (ja) | 2007-02-05 | 2008-02-05 | 光ファイバの誘電破壊の防止 |
JP2009549201A Pending JP2010518632A (ja) | 2007-02-05 | 2008-02-05 | 信号のモードとは異なる高次モードにおける励起 |
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US (6) | US7925128B2 (ja) |
EP (6) | EP2109788B1 (ja) |
JP (6) | JP5484073B2 (ja) |
CN (6) | CN101688949B (ja) |
AU (6) | AU2008213949B2 (ja) |
WO (6) | WO2008097986A2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013004590A (ja) * | 2011-06-13 | 2013-01-07 | Nippon Telegr & Teleph Corp <Ntt> | 光ファイバ増幅器 |
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JP5299959B2 (ja) * | 2008-12-02 | 2013-09-25 | 国立大学法人東北大学 | 光ビーム増幅方法および光ビーム増幅装置 |
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FR2952243B1 (fr) * | 2009-11-03 | 2012-05-11 | Univ Bordeaux 1 | Source optique mettant en oeuvre une fibre dopee, fibre pour une telle source optique et procede de fabrication d'une telle fibre |
US8498044B2 (en) * | 2009-12-22 | 2013-07-30 | Fujikura Ltd. | Amplification optical fiber, and optical fiber amplifier and resonator using the same |
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WO2012161810A1 (en) * | 2011-02-24 | 2012-11-29 | Ofs Fitel, Llc | Step-index few-mode fiber deigns for spatial multiplexing |
CN103460525B (zh) * | 2011-03-31 | 2015-04-08 | 株式会社藤仓 | 放大用光纤、使用其的光纤放大器以及谐振器 |
US9244218B2 (en) * | 2011-08-10 | 2016-01-26 | Ofs Fitel, Llc | Few moded fiber device employing mode conversion |
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WO2013169626A1 (en) | 2012-05-05 | 2013-11-14 | Trustees Of Boston University | High-power fiber laser employing nonlinear wave mixing with higher-order modes |
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