JP5584280B2 - ブリッジファイバ、コンバイナ及びファイバレーザ装置 - Google Patents
ブリッジファイバ、コンバイナ及びファイバレーザ装置 Download PDFInfo
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- 239000000835 fiber Substances 0.000 title claims description 119
- 239000013307 optical fiber Substances 0.000 claims description 96
- 239000010410 layer Substances 0.000 claims description 88
- 239000012792 core layer Substances 0.000 claims description 81
- 230000003321 amplification Effects 0.000 claims description 64
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 64
- 230000005284 excitation Effects 0.000 claims description 36
- 238000005086 pumping Methods 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000005253 cladding Methods 0.000 description 15
- 239000010453 quartz Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001902 propagating effect Effects 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 229910052769 Ytterbium Inorganic materials 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect 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
- 230000005281 excited state Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
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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
- H01S3/05—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
- H01S3/06783—Amplifying coupler
-
- 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
- G02B6/02—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
- G02B6/03638—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 3 layers only
-
- 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
- G02B6/02—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
- G02B6/03605—Highest refractive index not on central axis
- G02B6/03611—Highest index adjacent to central axis region, e.g. annular core, coaxial ring, centreline depression affecting waveguiding
-
- 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
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2821—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
-
- 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
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2852—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using tapping light guides arranged sidewardly, e.g. in a non-parallel relationship with respect to the bus light guides (light extraction or launching through cladding, with or without surface discontinuities, bent structures)
-
- 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
- H01S3/05—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
-
- 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
- H01S3/05—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
-
- 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
- H01S3/05—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
- H01S3/06791—Fibre ring lasers
-
- 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
- H01S3/09—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
-
- 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
- H01S3/09—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
-
- 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
- H01S3/09—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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Lasers (AREA)
- Optical Couplings Of Light Guides (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
この結果、戻り光が励起光入力用光ファイバを介して励起光源に伝搬することを、反射膜等の特別な部材を用いることなく抑制することができる。
こうして、戻り光に起因する励起光源の故障を低減させ得るブリッジファイバ、コンバイナ及びファイバレーザ装置が実現される。
<ファイバレーザ装置の構成>
図1は、第1実施形態におけるファイバレーザ装置1を示す図である。図1に示すように、本実施形態のファイバレーザ装置1は、共振型のファイバレーザであり、複数の励起光源11、コンバイナ12、第1ミラーとしての第1FBG(Fiber Bragg Grating)13、及び、第2ミラーとしての第2FBG14を主な構成要素として備える。
本実施形態におけるファイバレーザ装置1では、励起光源11から励起光入力用光ファイバ20を介してブリッジファイバ30に励起光が入射された場合、当該励起光は、ブリッジファイバ30における外層32を伝搬して増幅用光ファイバ40のクラッド42に入射する。
次に、本発明に好適な第2実施形態について図面を用いながら詳細に説明する。なお、第1実施形態と同一又は同等の構成要素については、特に説明する場合を除き、同一の参照符号を付して重複する説明は省略する。
11・・・励起光源
12・・・コンバイナ
13・・・第1FBG
14・・・第2FBG
20・・・励起光入力用光ファイバ
30・・・ブリッジファイバ
31・・・芯層
32・・・外層
33・・・テーパ部
34・・・最外層
40・・・増幅用光ファイバ
Claims (8)
- 芯層と、前記芯層の屈折率よりも高い屈折率を有し前記芯層の外周面を被覆する外層とを備えるブリッジファイバであって、
前記外層は、当該外層の屈折率よりも低い屈折率を有する物質により囲まれ、
前記ブリッジファイバの一端面における前記外層の領域は、複数の励起光入力用光ファイバのコア端面それぞれと光学的に結合すべき領域とされ、
前記ブリッジファイバの他端面における前記芯層の領域は、増幅用光ファイバのコア端面と光学的に結合すべき領域とされる
ことを特徴とするブリッジファイバ。 - 前記物質は、大気とされる
ことを特徴とする請求項1のブリッジファイバ。 - 前記物質は、前記外層の外周面を被覆する最外層とされる
ことを特徴とする請求項1のブリッジファイバ。 - 前記最外層の屈折率は、前記芯層の屈折率よりも低い
ことを特徴とする請求項3に記載のブリッジファイバ。 - 前記ブリッジファイバの他端面における前記芯層の外径は、当該芯層に融着される光ファイバのコア外径よりも大きい
ことを特徴とする請求項1〜請求項4いずれか1項に記載のブリッジファイバ。 - 前記ブリッジファイバは、前記ブリッジファイバの一端面側から他端面側に向かって縮径するテーパ部を有する
ことを特徴とする請求項1〜請求項5いずれか1項に記載のブリッジファイバ。 - 複数の励起光入力用光ファイバと、
芯層、及び、前記芯層の屈折率よりも高い屈折率を有し前記芯層の外周面を被覆する外層を含むブリッジファイバと、
を備え、
前記外層は、当該外層の屈折率よりも低い屈折率を有する物質により囲まれ、
前記ブリッジファイバの一端面における前記外層の領域は、前記複数の励起光入力用光ファイバの一端面と光学的に結合し、
前記ブリッジファイバの他端面における前記芯層の領域は、増幅用光ファイバのコア端面と光学的に結合すべき領域とされる
ことを特徴とするコンバイナ。 - 複数の励起光入力用光ファイバと、
増幅用光ファイバと、
芯層と、及び、前記芯層の屈折率よりも高い屈折率を有し前記芯層の外周面を被覆する外層を含むブリッジファイバと、
前記増幅用光ファイバに所定距離を隔てて配置される一対のミラーと、
を備え、
前記外層は、当該外層の屈折率よりも低い屈折率を有する物質により囲まれ、
前記ブリッジファイバの一端面における前記外層の領域は、前記複数の励起光入力用光ファイバの一端面と光学的に結合し、
前記ブリッジファイバの他端面における前記芯層の領域は、増幅用光ファイバのコア端面と光学的に結合する
ことを特徴とするファイバレーザ装置。
Priority Applications (3)
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JP2012279218A JP5584280B2 (ja) | 2012-12-21 | 2012-12-21 | ブリッジファイバ、コンバイナ及びファイバレーザ装置 |
US14/133,867 US9088129B2 (en) | 2012-12-21 | 2013-12-19 | Bridge fiber, combiner, and fiber laser device |
US14/740,590 US10014648B2 (en) | 2012-12-21 | 2015-06-16 | Bridge fiber, combiner, and fiber laser device |
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JP2012279218A JP5584280B2 (ja) | 2012-12-21 | 2012-12-21 | ブリッジファイバ、コンバイナ及びファイバレーザ装置 |
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JP2014123648A JP2014123648A (ja) | 2014-07-03 |
JP5584280B2 true JP5584280B2 (ja) | 2014-09-03 |
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JP (1) | JP5584280B2 (ja) |
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JP7267219B2 (ja) | 2020-02-17 | 2023-05-01 | 日鉄溶接工業株式会社 | 狭開先サブマージアーク溶接方法 |
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JP7267219B2 (ja) | 2020-02-17 | 2023-05-01 | 日鉄溶接工業株式会社 | 狭開先サブマージアーク溶接方法 |
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US10014648B2 (en) | 2018-07-03 |
US20140178021A1 (en) | 2014-06-26 |
JP2014123648A (ja) | 2014-07-03 |
US20150280389A1 (en) | 2015-10-01 |
US9088129B2 (en) | 2015-07-21 |
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