JP6992907B2 - 光増幅装置および光増幅方法 - Google Patents
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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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- H01S3/00—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
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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
- G02B6/24—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
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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
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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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- H01S3/091—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
- H01S3/094015—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre with pump light recycling, i.e. with reinjection of the unused pump light back into the fiber, e.g. by reflectors or circulators
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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
- G02B6/02042—Multicore optical fibres
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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
- G02B6/26—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
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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
- G02B6/293—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
- G02B6/29389—Bandpass filtering, e.g. 1x1 device rejecting or passing certain wavelengths
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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
- H01S3/06737—Fibre having multiple non-coaxial cores, e.g. multiple active cores or separate cores for pump and gain
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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
- H01S3/094007—Cladding pumping, i.e. pump light propagating in a clad surrounding the active core
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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
- H01S3/094049—Guiding of the pump light
- H01S3/094053—Fibre coupled pump, e.g. delivering pump light using a fibre or a fibre bundle
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- H—ELECTRICITY
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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
- H01S3/094069—Multi-mode pumping
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/1001—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by controlling the optical pumping
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—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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- Lasers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
図1は、本発明の第1の実施形態に係る光増幅装置100の構成を示すブロック図である。
次に、本発明の第2の実施形態について説明する。図2に、本実施形態によるマルチコア光増幅器200の構成を示す。
次に、本発明の第3の実施形態について説明する。図6に、本実施形態によるマルチコア光増幅器300の構成を示す。
110 光増幅媒体
120 励起光導入手段
130 残留励起光導入手段
131 残留励起光合波手段
132 空間伝搬型波長分離手段
200、300 マルチコア光増幅器
210 第1の合波器
220 第2の合波器
230 マルチコアエルビウム添加ファイバ
240 分波器
250 励起光源
260 励起光制御部
271、272、273 マルチコア光ファイバ
281、282 マルチモード光ファイバ
290 光アイソレータ
310 空間光変調器
380 光ファイバ
2410 光学レンズ系を備えた分波器
241、2411、2421 第1のレンズ
242、2412、2422 第2のレンズ
243、2413、2423 第3のレンズ
244、2414、2424 ダイクロイックミラー
2420 空間光変調器を備えた分波器
2425 空間光変調器
2511 可動台
2512、2522 光受光器
2731 第1のマルチコア光ファイバ
2732 第2のマルチコア光ファイバ
2810 マルチモード光ファイバ
10 信号光
11 励起光
12 残留励起光
20 波長多重光源
21 波長多重信号光
22 残留励起光
23 合成励起光
24 増幅多重信号光
25 光雑音成分
Claims (10)
- 信号光の波長帯域に利得を有し前記信号光を受付ける光増幅媒体と、
前記光増幅媒体を励起する励起光を前記光増幅媒体に導入する励起光導入手段と、
前記光増幅媒体から出力される、前記励起光の波長成分を有する残留励起光を、前記光増幅媒体に導入する残留励起光導入手段、とを有し、
前記残留励起光導入手段は、前記信号光と前記残留励起光を合波する残留励起光合波手段を前記光増幅媒体の一端側に備え、前記信号光と前記残留励起光を空間光学系により波長分離する空間伝搬型波長分離手段を前記光増幅媒体の他端側に備える
光増幅装置。 - 前記空間伝搬型波長分離手段は、前記残留励起光の空間強度分布を変換する機能を有する
請求項1に記載した光増幅装置。 - 前記残留励起光導入手段は、前記残留励起光を導波する第1の残留励起光導波手段を有し、
前記空間伝搬型波長分離手段は、前記残留励起光が前記第1の残留励起光導波手段に結合するように前記空間強度分布を変換する光学レンズ系を備える
請求項2に記載した光増幅装置。 - 前記残留励起光導入手段は、前記残留励起光を導波する第1の残留励起光導波手段を有し、
前記空間伝搬型波長分離手段は、前記残留励起光が前記第1の残留励起光導波手段に結合するように前記空間強度分布を変換する空間光変調器を備える
請求項2に記載した光増幅装置。 - 前記残留励起光合波手段において合波された前記信号光と前記残留励起光を導波する合波光導波手段と、
前記残留励起光合波手段の前記残留励起光が出力される側に配置された、前記残留励起光の空間強度分布を変換する機能を有する空間光変調手段、とをさらに有し、
前記空間光変調手段は、前記残留励起光が前記合波光導波手段に結合するように前記空間強度分布を変換する
請求項1に記載した光増幅装置。 - 前記残留励起光導入手段は、前記残留励起光を導波する第2の残留励起光導波手段を有し、
前記第2の残留励起光導波手段は、光ファイバを備え、
前記光ファイバは、前記残留励起光のビーム径よりも大きなコア径を有する
請求項5に記載した光増幅装置。 - 前記励起光導入手段は、
前記励起光を生成する励起光生成手段と、
前記信号光と前記励起光を合波する波長合波手段、とを備える
請求項1から6のいずれか一項に記載した光増幅装置。 - 前記空間伝搬型波長分離手段は、ダイクロイックミラーを備える
請求項1から7のいずれか一項に記載した光増幅装置。 - 前記光増幅媒体は、希土類イオンが添加されたコアと、ダブルクラッド構造とを有するマルチコア光ファイバであり、
前記励起光導入手段は、クラッド励起方式により前記励起光を前記光増幅媒体に導入する
請求項1から8のいずれか一項に記載した光増幅装置。 - 信号光の波長帯域に利得を有する光増幅媒体に前記信号光を導入し、
前記光増幅媒体を励起する励起光を前記光増幅媒体に導入し、
前記光増幅媒体から出力される、前記励起光の波長成分を有する残留励起光を、前記光増幅媒体に導入し、
前記残留励起光を前記光増幅媒体に導入することは、
前記光増幅媒体の一端側において、前記信号光と前記残留励起光を合波し、
前記光増幅媒体の他端側において、前記信号光と前記残留励起光を空間光学系により波長分離することを含む
光増幅方法。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000261078A (ja) | 1999-03-10 | 2000-09-22 | Hitachi Cable Ltd | 光増幅器 |
JP2005019501A (ja) | 2003-06-24 | 2005-01-20 | Nec Corp | 光増幅器の励起方法及びこれを用いた光増幅器ユニット並びに光伝送システム。 |
JP2012178478A (ja) | 2011-02-26 | 2012-09-13 | Optohub:Kk | 高速光増幅器 |
JP2017005083A (ja) | 2015-06-09 | 2017-01-05 | 三菱重工業株式会社 | レーザ増幅システム |
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JPH0195580A (ja) * | 1987-10-07 | 1989-04-13 | Mitsubishi Electric Corp | レーザーシステム |
JPH0540283A (ja) * | 1991-08-06 | 1993-02-19 | Furukawa Electric Co Ltd:The | 光増幅方法 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000261078A (ja) | 1999-03-10 | 2000-09-22 | Hitachi Cable Ltd | 光増幅器 |
JP2005019501A (ja) | 2003-06-24 | 2005-01-20 | Nec Corp | 光増幅器の励起方法及びこれを用いた光増幅器ユニット並びに光伝送システム。 |
JP2012178478A (ja) | 2011-02-26 | 2012-09-13 | Optohub:Kk | 高速光増幅器 |
JP2017005083A (ja) | 2015-06-09 | 2017-01-05 | 三菱重工業株式会社 | レーザ増幅システム |
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