JP2022066501A - 光増幅器 - Google Patents
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- JP2022066501A JP2022066501A JP2022035924A JP2022035924A JP2022066501A JP 2022066501 A JP2022066501 A JP 2022066501A JP 2022035924 A JP2022035924 A JP 2022035924A JP 2022035924 A JP2022035924 A JP 2022035924A JP 2022066501 A JP2022066501 A JP 2022066501A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 115
- 230000005284 excitation Effects 0.000 claims abstract description 75
- 238000001069 Raman spectroscopy Methods 0.000 claims abstract description 51
- 239000000835 fiber Substances 0.000 claims abstract description 40
- 238000004891 communication Methods 0.000 claims description 32
- 238000005253 cladding Methods 0.000 claims description 5
- 230000001902 propagating effect Effects 0.000 claims 1
- 230000003321 amplification Effects 0.000 abstract description 43
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 43
- 230000000052 comparative effect Effects 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 238000004088 simulation Methods 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052691 Erbium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000005374 Kerr effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 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
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000012368 scale-down model Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- 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
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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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- H01S3/05—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
- H01S3/06716—Fibre compositions or doping with active elements
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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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- H01S3/06754—Fibre amplifiers
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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
- H01S3/06758—Tandem amplifiers
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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
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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- H04B10/2581—Multimode transmission
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- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/2912—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing
- H04B10/2916—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing using Raman or Brillouin amplifiers
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- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0256—Optical medium access at the optical channel layer
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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
- H01S3/06745—Tapering of the fibre, core or active region
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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
- H01S3/094011—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre with bidirectional pumping, i.e. with injection of the pump light from both two ends of the 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
- H01S3/094069—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
- H01S3/09—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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- 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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- 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
- H01S3/2308—Amplifier arrangements, e.g. MOPA
- H01S3/2316—Cascaded amplifiers
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Lasers (AREA)
- Optical Communication System (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
実施の形態1にかかるファイバラマン増幅器について説明する。図1は、実施の形態1にかかる光通信システム100を模式的に示す図である。光通信システム100は、光通信装置101及び102、ファイバラマン増幅器(FRA:Fiber Raman Amplifier)10を有する。
次に、実施の形態2にかかるファイバラマン増幅器について説明する。図6に、実施の形態2にかかるFRA20の構成を模式的に示す。FRA20は、FRA10のWDMカプラ120及び光源130を、空間分割多重(SDM:Space Division Multiplex)カプラ220(第1の光カプラとも称する)及び光源230(第1の光源とも称する)に置き換えた構成を有する。
次に、実施の形態3にかかるファイバラマン増幅器について説明する。図9に、実施の形態3にかかるFRA30の構成を示す。FRA30は、FRA10のMCF110を、MCF310に置換し、かつ、MC-EDFA(マルチコア-エルビウムドープファイバ増幅器:Multi Core - Erbium Doped Fiber Amplifier)340を追加した構成を有する。本構成において、MC-EDFA340は、MCF310を介してSRSにより増幅された多重光信号SIGをさらに増幅する。なお、図9では、簡略化のため、外側クラッドCL2を省略している。
次に、実施の形態4にかかるファイバラマン増幅器について説明する。図10に、実施の形態4にかかるFRA40の構成を示す。FRA40は、ファイバラマン増幅器30のMCF310をMCF410に置換した構成を有する。
次に、実施の形態5にかかるファイバラマン増幅器について説明する。図12に、実施の形態5にかかるFRA50の構成を示す。FRA50は、FRA30のMCF310をMCF110に置換し、光源130を光源530及び550に置換し、かつ、WDMカプラ560を追加した構成を有する。WDMカプラ560は、MCF110の入力端に配置される。
次に、実施の形態6にかかるファイバラマン増幅器について説明する。図14に、実施の形態6にかかるFRA60の構成を示す。FRA60は、FRA10のMCF110を、MCF610に置換した構成を有する。
本発明は、本発明は上記実施の形態に限られたものではなく、趣旨を逸脱しない範囲で適宜変更することが可能である。例えば、コアの数は、2以上の任意の数とすることができる。
100 光通信システム
101、102 光通信装置
110、310、410、410A、410B、610、610A、610C マルチコアファイバ(MCF)
120、560 WDMカプラ
130、230、550 光源
131~132、531、532、551、552 レーザ
220 SDMカプラ
230A モードカプラ
340、610B マルチコア-エルビウムドープファイバ増幅器(MC-EDFA)
C1~C7 コア
CL1 内側クラッド
CL2 外側クラッド
L1~L3、L11、L12、L21、L22 レーザ光
PL、PL1、PL2 励起光
Claims (10)
- 信号光を伝送する複数のコアと、該複数のコアを含む内側クラッドと、該内側クラッドを含む外側クラッドと、を備えるマルチコアファイバと、
前記信号光の増幅に使用される励起光を出力する励起光源と、
前記励起光を前記内側クラッドに結合する光カプラと、を備え、
前記励起光源は、モード多重されたマルチモードレーザ光を出力する、
光増幅器。 - 前記信号光は、前記マルチコアファイバ内で誘導ラマン散乱によって増幅される、
請求項1に記載の光増幅器。 - 前記光増幅器は、分布型増幅器であり、光通信波長帯のマルチバンドに対応可能である、
請求項1または2に記載の光増幅器。 - 前記マルチバンドは、Lバンド、CバンドまたはSバンドの少なくともいずれか一つを含む、
請求項3に記載の光増幅器。 - 前記励起光源は、複数の入力光をモード多重して出力するモードカプラを含む、
請求項1乃至4のいずれか一項に記載の光増幅器。 - 前記励起光源は、マルチモードレーザを複数含む、
請求項1乃至5のいずれか一項に記載の光増幅器。 - 前記信号光と前記励起光は、前記マルチコアファイバ内を互いに逆方向に伝搬する、
請求項1乃至6のいずれか一項に記載の光増幅器。 - 前記内側クラッドは、前記信号光の伝搬方向に沿って直径が増加する、
請求項1乃至7のいずれか一項に記載の光増幅器。 - 前記光増幅器は、前記信号光と同方向に伝搬する励起光を、前記内側クラッドに結合する光カプラをさらに備える、
請求項1乃至8のいずれか一項に記載の光増幅器。 - 前記信号光は、波長分割多重または空間分割多重の少なくとも一方によって多重化されている、
請求項1乃至9のいずれか一項に記載の光増幅器。
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JP2022035924A JP7342993B2 (ja) | 2018-04-11 | 2022-03-09 | 光増幅器 |
JP2023140118A JP2023160879A (ja) | 2018-04-11 | 2023-08-30 | 光増幅器及び光増幅方法 |
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PCT/JP2018/015208 WO2019198171A1 (en) | 2018-04-11 | 2018-04-11 | Optical amplifier, optical communication system and optical amplification method |
JP2020554911A JP7040639B2 (ja) | 2018-04-11 | 2018-04-11 | 光増幅器、光通信システム及び光増幅方法 |
JP2022035924A JP7342993B2 (ja) | 2018-04-11 | 2022-03-09 | 光増幅器 |
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EP (1) | EP3776759A4 (ja) |
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WO (1) | WO2019198171A1 (ja) |
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US20210028590A1 (en) | 2021-01-28 |
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EP3776759A4 (en) | 2021-04-21 |
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