JP2023521934A - 低複屈折アクティブ光ファイバ - Google Patents
低複屈折アクティブ光ファイバ Download PDFInfo
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- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
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- 238000002310 reflectometry Methods 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
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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
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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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- H01S3/06—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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- H01S3/06—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
- H01S3/05—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
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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
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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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
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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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
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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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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/14—Mode converters
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/0014—Monitoring arrangements not otherwise provided for
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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
- H01S3/094007—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
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- 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
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- 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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- Optical Couplings Of Light Guides (AREA)
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Abstract
【選択図】図9
Description
Claims (18)
- 光信号を増幅するためのアクティブ光ファイバのセクションであって、
少なくとも1つの希土類元素でドープされたアクティブコアであって、第一の屈折率を有し、前記光信号のシングルモード動作をサポートするように構成される、アクティブコアと、
第二の屈折率を有する少なくとも1つのクラッド層であって、前記第二の屈折率が前記第一の屈折率よりも小さく、前記アクティブコアの複屈折が10-5未満であり、前記アクティブコアの直径が前記アクティブ光ファイバの前記セクションの長さに沿って徐々に変化して先細縦プロファイルを形成する、少なくとも1つのクラッド層と、
を備える、アクティブ光ファイバのセクション。 - 前記少なくとも1つのクラッド層が、前記アクティブコアの周囲に、前記第二の屈折率を有する内側クラッド層と、前記内側クラッド層の周囲に、前記第二の屈折率より小さい第三の屈折率を有する外側クラッド層と、を備える、請求項1に記載のアクティブ光ファイバのセクション。
- 前記アクティブコアの第一の部分の半径は、前記アクティブコアの第二の部分の半径より小さい、請求項1に記載のアクティブ光ファイバのセクション。
- 前記アクティブコアの前記第一の部分は、前記光信号の前記シングルモード動作のための伝搬条件を満たし、前記アクティブコアの前記第二の部分は、前記光信号のマルチモード動作をサポートする、請求項3に記載のアクティブ光ファイバのセクション。
- 前記伝搬条件は、2πrNA/λ<2.405を含み、rは前記アクティブコアの前記第一の部分の半径、NAは前記アクティブコアの前記第一の部分の開口数、λは前記光信号の波長である、請求項4に記載のアクティブ光ファイバのセクション。
- 前記アクティブコアの前記第一の部分は、前記光信号を受信するように構成される、請求項3~5のいずれか一項に記載のアクティブ光ファイバのセクション。
- 前記アクティブコアの前記第一の部分は、励起放射を受信するように構成され、及び/又は前記アクティブコアの前記第二の部分は、前記励起放射を受信するように構成される、請求項3~6のいずれか一項に記載のアクティブ光ファイバのセクション。
- 前記アクティブコアが前記光信号を受信するように構成され、前記内側クラッド層が励起放射を受信するように構成される、請求項2~6のいずれか一項に記載のアクティブ光ファイバのセクション。
- 前記内側クラッド層の厚さが、前記先細縦プロファイルに沿って徐々に変化する、請求項1~8のいずれか一項に記載のアクティブ光ファイバのセクション。
- 前記アクティブコアの前記第一の部分の周りの前記内側クラッド層の第一の部分と、前記アクティブコアの前記第二の部分の周りの前記内側クラッド層の第二の部分と、をさらに備え、前記内側クラッド層の前記第一の部分の厚さは、前記内側クラッド層の前記第二の部分の厚さより小さい、請求項9に記載のアクティブ光ファイバのセクション。
- 前記内側クラッド層の前記第一の部分が前記励起放射を受信するように構成され、及び/又は前記内側クラッド層の前記第二の部分が前記励起放射を受信するように構成される、請求項10に記載のアクティブ光ファイバのセクション。
- 前記アクティブコアの前記第一の部分が前記アクティブコアの狭端部を備え、前記アクティブコアの前記第二の部分が前記アクティブコアの広端部を備える、請求項3~11のいずれか一項に記載のアクティブ光ファイバのセクション。
- 前記内側クラッド層の前記第一の部分が前記内側クラッド層の狭端部を備え、前記内側クラッド層の前記第二の部分が前記内側クラッド層の広端部を備える、請求項10~12のいずれか一項に記載のアクティブ光ファイバのセクション。
- 前記励起放射は、前記光信号と実質的に同じ方向及び/又は前記光信号と実質的に反対方向に伝搬するように構成される、請求項7~13のいずれか一項に記載のアクティブ光ファイバのセクション。
- 請求項1~14のいずれか一項に記載のアクティブ光ファイバのセクションを備える装置であって、さらに、
少なくとも1つの励起放射カップラに光学的に接続された少なくとも1つの励起放射源であって、前記励起放射結合器が前記励起放射源からの放射を前記アクティブ光ファイバに結合するように構成される、少なくとも1つの励起放射源
を備える、装置。 - 前記装置が、ファイバレーザデバイスを備え、さらに、
前記アクティブ光ファイバの第一端に光学的に接続された第一の反射鏡、又は前記アクティブ光ファイバの前記第一端に光学的に接続された第一の励起放射結合器
を備える、請求項15に記載の装置。 - さらに、前記アクティブ光ファイバの第二端に光学的に接続された第二の反射鏡、又は前記アクティブ光ファイバの前記第二端に光学的に接続された第二の励起放射結合器を、備える、請求項16に記載の装置。
- 前記装置がファイバマスタ発振器電力増幅器を備え、さらに、
前記励起結合器に光学的に接続されたシードレーザ源であって、前記励起結合器が前記シードレーザ源からの光を前記アクティブ光ファイバに結合するように構成される、シードレーザ源
を備える、請求項15に記載の装置。
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EP (1) | EP4097806A1 (ja) |
JP (1) | JP2023521934A (ja) |
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US5627848A (en) * | 1995-09-05 | 1997-05-06 | Imra America, Inc. | Apparatus for producing femtosecond and picosecond pulses from modelocked fiber lasers cladding pumped with broad area diode laser arrays |
US5704960A (en) * | 1995-12-20 | 1998-01-06 | Corning, Inc. | Method of forming an optical fiber for reduced polarization effects in amplifiers |
US6954575B2 (en) * | 2001-03-16 | 2005-10-11 | Imra America, Inc. | Single-polarization high power fiber lasers and amplifiers |
WO2009043964A1 (en) * | 2007-10-03 | 2009-04-09 | Optoelectronics Research Centre, Tampere University Of Technology | Active optical fiber and method for fabricating an active optical fiber |
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CA3180318A1 (en) | 2021-08-05 |
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