JP7177090B2 - 高パワークラッディングポンプ単一モードファイバーラマンレーザー - Google Patents
高パワークラッディングポンプ単一モードファイバーラマンレーザー Download PDFInfo
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- JP7177090B2 JP7177090B2 JP2019563225A JP2019563225A JP7177090B2 JP 7177090 B2 JP7177090 B2 JP 7177090B2 JP 2019563225 A JP2019563225 A JP 2019563225A JP 2019563225 A JP2019563225 A JP 2019563225A JP 7177090 B2 JP7177090 B2 JP 7177090B2
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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
- H01S3/30—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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- 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
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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
- H01S3/06733—Fibre having more than one cladding
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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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08018—Mode suppression
- H01S3/0804—Transverse or lateral modes
- H01S3/08045—Single-mode emission
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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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- 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
- H01S3/094049—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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- 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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- H—ELECTRICITY
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- 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
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
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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
- H01S3/05—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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- 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
- H01S3/094038—End pumping
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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
- H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser
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- H—ELECTRICITY
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- 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
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- 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
- H01S3/17—Solid materials amorphous, e.g. glass
- H01S3/176—Solid materials amorphous, e.g. glass silica or silicate glass
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
- Optical Couplings Of Light Guides (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Description
4 出力パッシブファイバー
6 フィーディングファイバー
8 クラッディング
10 ラマンファイバーレーザー光源
12 MMコア
14 MMラマンファイバー
16 導波内側クラッディング
18 MMラマンコア
22 出力ファイバー
24 SMコア
25 集束レンズ
26 強FBG
28 弱FBG
30 中央コア領域
32 MMファイバーラマン増幅器(FRA)
34 SMシードレーザー光源
35 集束レンズ
36 SMファイバー
38 強FBG
42中央のSMファイバーレーザーポンプ
44 複数のSMファイバーレーザーポンプ
46 弱FBG
48 SM-MM結合器
52 フィーディングファイバー
Claims (6)
- 終端ポンプマルチクラッドラマンファイバーであって、
波長λpumpで経路に沿って伝搬するマルチモード(MM)ポンプ放射を受け取る内側クラッディングと、
前記内側クラッディングによって取り囲まれ、中央コア領域を有して設けられたMMコアと、を有し、前記ポンプ放射が、波長λpumpよりも長いラマンシフト波長λramで前記ポンプ放射の信号放射への変換を誘導するラマン散乱を生成し、前記中央コア領域が、前記信号放射の基本モード(FM)のみを実質的に閉じ込めるような寸法とされ、前記ラマン散乱を増強する不純物でドープされた、終端ポンプマルチクラッドラマンファイバーと、
前記中央コア領域を少なくとも部分的に含む前記波長λramにおける前記FMのための共振器を間に画定する、間隔を開けられた波長選択反射体と、
前記ラマンファイバーの上流に配置され、前記ポンプ放射を前記ラマンファイバーの上流端部に送達するMMフィーディングファイバーと、
前記MMフィーディングファイバー及び前記ラマンファイバーのそれぞれの対向する端部にスプライスされたMM中間パッシブファイバーと、
前記ラマンファイバーの下流端部にスプライスされたSM出力パッシブファイバーと、を含み、
前記波長選択反射体が、前記信号放射の前記FMと整合するような寸法とされ、前記ラマンファイバーが、前記信号放射を前記FM内にM2≦1.1で、数キロワット(kW)から数十kWのパワー範囲で出力し、
前記波長選択反射体がそれぞれ、前記MM中間パッシブファイバー及び前記SM出力パッシブファイバーのコアに書き込まれ、光学的に前記中央コア領域と位置合わせされたファイバーブラッグ格子である、高パワー単一モード(SM)ラマンレーザー光源。 - 前記MM中間パッシブファイバーが、誘導ラマン放射のビームクリーンアップ効果を通して、前記MM中間パッシブファイバーの実質的にFMのみの伝搬をサポートするMMコアを有して構成され、それぞれあるモード場直径を有する前記MM中間パッシブファイバー及び前記ラマンファイバーのFMが、互いに整合する、請求項1に記載のSMラマンレーザー光源。
- 間隔を開けられたフィーディングファイバーとラマンファイバーとの間の、コリメートレンズ及び集束レンズと、前記経路で後方反射された光を偏向する、前記レンズの間の傾斜ミラーと、をさらに含む、請求項1に記載のSMラマンレーザー光源。
- 各ファイバーレーザーポンプの出力が、前記ポンプ波長λpumpで高パワーMMポンプ放射を生成するように、結合器内で1つに結合された各出力ファイバーを有する複数のファイバーレーザーポンプをさらに含む、請求項1から3のいずれか一項に記載のSMラマンレーザー光源。
- 前記ポンプ波長λpumpが約1070nmであり、前記ラマンシフト波長λramが約1120nmである、請求項1から4のいずれか一項に記載のSMラマンレーザー光源。
- 前記ラマンファイバーの前記内側クラッディング及び前記MMコアが、互いに整合する屈折率をそれぞれ有する純粋なシリカで形成され、内側クラッディング領域が、デプレッションを提供するようにフッ素でドープされた、請求項1から5のいずれか一項に記載のSMラマンレーザー光源。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US201762506278P | 2017-05-15 | 2017-05-15 | |
US62/506,278 | 2017-05-15 | ||
PCT/US2018/032539 WO2019013862A2 (en) | 2017-05-15 | 2018-05-14 | RAMAN LASER FIBER MONOMODE PUMP WITH HIGH POWER SENSING |
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JP2020519963A JP2020519963A (ja) | 2020-07-02 |
JP7177090B2 true JP7177090B2 (ja) | 2022-11-22 |
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US (1) | US11862926B2 (ja) |
EP (1) | EP3613113B1 (ja) |
JP (1) | JP7177090B2 (ja) |
KR (1) | KR102472018B1 (ja) |
CN (1) | CN110663146B (ja) |
WO (1) | WO2019013862A2 (ja) |
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- 2018-05-14 US US16/613,463 patent/US11862926B2/en active Active
- 2018-05-14 JP JP2019563225A patent/JP7177090B2/ja active Active
- 2018-05-14 EP EP18831601.2A patent/EP3613113B1/en active Active
- 2018-05-14 CN CN201880032089.6A patent/CN110663146B/zh active Active
- 2018-05-14 WO PCT/US2018/032539 patent/WO2019013862A2/en unknown
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CODEMARD et al.,High-power continuous-wave cladding-pumped Raman fiber laser,OPTICS LETTERS,米国,OSA,2006年08月01日,Vol.31, No.15,p.2290 - p.2292 |
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JP2020519963A (ja) | 2020-07-02 |
WO2019013862A3 (en) | 2019-03-28 |
US20210159662A1 (en) | 2021-05-27 |
EP3613113B1 (en) | 2022-10-05 |
WO2019013862A2 (en) | 2019-01-17 |
CN110663146B (zh) | 2021-09-21 |
US11862926B2 (en) | 2024-01-02 |
CN110663146A (zh) | 2020-01-07 |
EP3613113A4 (en) | 2021-01-13 |
KR20200006979A (ko) | 2020-01-21 |
EP3613113A2 (en) | 2020-02-26 |
KR102472018B1 (ko) | 2022-11-28 |
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