JP6830963B2 - ファイバレーザ装置 - Google Patents
ファイバレーザ装置 Download PDFInfo
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- JP6830963B2 JP6830963B2 JP2018546377A JP2018546377A JP6830963B2 JP 6830963 B2 JP6830963 B2 JP 6830963B2 JP 2018546377 A JP2018546377 A JP 2018546377A JP 2018546377 A JP2018546377 A JP 2018546377A JP 6830963 B2 JP6830963 B2 JP 6830963B2
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- 239000000835 fiber Substances 0.000 title claims description 66
- 230000003287 optical effect Effects 0.000 claims description 394
- 239000013307 optical fiber Substances 0.000 claims description 239
- 230000003321 amplification Effects 0.000 claims description 83
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 83
- 230000001902 propagating effect Effects 0.000 claims description 29
- 230000005284 excitation Effects 0.000 description 52
- 238000006243 chemical reaction Methods 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 230000002123 temporal effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001069 Raman spectroscopy Methods 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 230000005281 excited state Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 229910052769 Ytterbium Inorganic materials 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 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
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 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
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
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Description
図1は、本実施形態に係るファイバレーザ装置を示す図である。
種光部MOは、励起光を出射する励起光源11と、励起光源11から出射する励起光が入射し、当該励起光により励起される活性元素が添加される増幅用光ファイバ13と、増幅用光ファイバ13の一端側に設けられる第1反射部としてのFBG(Fiber Bragg Grating)12と、増幅用光ファイバ13の他端に接続され第2反射部を兼ねる音響光学素子(AOM)14と、FBG12とAOM14との間に設けられる光カプラ16と、光カプラ16に接続されるループ光ファイバ15と、を主な構成として備える。このように種光部MOは、共振型のファイバレーザ装置から成る。
プリアンプPRは、励起光源21と、増幅用光ファイバ23と、カプラ22とを主な構成として備える。
波長変換部RFは、プリアンプPRの増幅用光ファイバ23に接続されている。波長変換部RFは、入射する光のうちパワーが所定のパワーより大きな光を、入射する光より長波長の光に変換して出射し、入射する光のうちパワーが所定のパワーより小さな光を、入射する光の波長のまま出射する。
メインアンプPAは、入射する光をプリアンプPRよりも高い増幅率で増幅する点においてプリアンプPRと異なり、複数の励起光源31と、増幅用光ファイバ33と、カプラ32とを主な構成として備える。
次に、このようなファイバレーザ装置1からパルス状の光が出射する動作について説明する。
次に本発明の第2実施形態について図5を参照して詳細に説明する。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。
第1実施形態の種光部MOの構成と同じ構成の光学系を準備した。この光学系では、AOM14が振動する所定周期を135MHzとした。また、この光学系で、AOM14からループ光ファイバ15を経由せずにFBG12に至る特定の光路の光路長である基本光路長Sと、ループ光ファイバ15の光路長であるループ光路長Lとの関係を以下の様にした。
2S+3L=740cm
比較例の光学系よりも基本光路長の長さを1cm増やして、光路長を742cmとしたこと以外は、比較例と同じ光学系を準備した。この光学系では、光の共振周期と、AOM14が振動する所定周期とが、互いに非整数倍の関係とされている。
11,21,31・・・励起光源
13,23,33・・・増幅用光ファイバ
15・・・ループ光ファイバ
FL・・・波長選択フィルタ
MO・・・種光部(ファイバレーザ装置)
PA・・・メインアンプ
PR・・・プリアンプ
RF・・・波長変換部
Claims (9)
- 一部が共有され光が共振する複数の光路と、
それぞれの前記光路の一部とされそれぞれの前記光路で共振するそれぞれの光を増幅する増幅用光ファイバと、
それぞれの前記光路の共有される部分に配置され、所定周期で振動して前記光路から入射する光を前記光路に出射する第1状態と、前記光路から入射する光を前記光路以外に出射する第2状態とに切り換えられる音響光学素子と、
を備え、
それぞれの前記光路で共振するそれぞれの光のうち最もパワーの大きな光の共振周期と、前記第1状態において前記音響光学素子が振動する前記所定周期とが、互いに非整数倍の関係とされる
ことを特徴とするファイバレーザ装置。 - それぞれの前記光路で共振するそれぞれの光のそれぞれの共振周期と、前記第1状態において前記音響光学素子が振動する前記所定周期とが、互いに非整数倍の関係とされる
ことを特徴とする請求項1に記載のファイバレーザ装置。 - 前記複数の光路は、特定の光路、及び、前記特定の光路と前記特定の光路の途中に接続される周回状のループ光路とからなる光路を有し、
前記特定の光路を伝搬する光は所定の分岐比で前記ループ光路に分岐し、前記ループ光路を伝搬する光は前記所定の分岐比で前記特定の光路に結合する
ことを特徴とする請求項1に記載のファイバレーザ装置。 - 前記特定の光路は、一対の反射部間で光が往復する光路である
ことを特徴とする請求項3に記載のファイバレーザ装置。 - 前記所定の分岐比は3dB以下とされ、前記特定の光路で共振する光の前記共振周期と、前記第1状態において前記音響光学素子が振動する前記所定周期とが、互いに非整数倍の関係とされる
ことを特徴とする請求項4に記載のファイバレーザ装置。 - 前記所定の分岐比は3dB以上4.8dB以下とされ、前記特定の光路を伝搬する途中で前記ループ光路を1周する光路で共振する光の前記共振周期と、前記第1状態において前記音響光学素子が振動する前記所定周期とが、互いに非整数倍の関係とされる
ことを特徴とする請求項4に記載のファイバレーザ装置。 - 前記所定の分岐比は4.8dB以上とされ、前記特定の光路を伝搬する途中で前記ループ光路を2周する光路で共振する光の前記共振周期と、前記第1状態において前記音響光学素子が振動する前記所定周期とが、互いに非整数倍の関係とされる
ことを特徴とする請求項4に記載のファイバレーザ装置。 - 前記所定の分岐比は2dB以上8dB以下とされる
ことを特徴とする請求項4に記載のファイバレーザ装置。 - 前記特定の光路は、周回状の光路である
ことを特徴とする請求項3に記載のファイバレーザ装置。
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US5956355A (en) * | 1991-04-29 | 1999-09-21 | Massachusetts Institute Of Technology | Method and apparatus for performing optical measurements using a rapidly frequency-tuned laser |
US5878071A (en) * | 1997-03-26 | 1999-03-02 | Lucent Technologies Inc. | Fabry-perot pulsed laser having a circulator-based loop reflector |
JP3580488B2 (ja) | 2000-03-23 | 2004-10-20 | 日本電信電話株式会社 | 周波数シフト帰還型モード同期レーザ及び周波数シフト帰還型再生モード同期レーザ。 |
US6597494B2 (en) | 2001-07-13 | 2003-07-22 | Fujikura Ltd. | Polarization maintaining optical fiber amplifier and optical amplifier |
US7558300B2 (en) * | 2003-12-18 | 2009-07-07 | Peter Dragic | Injection seeded, q-switched fiber ring laser |
US7120174B2 (en) * | 2004-06-14 | 2006-10-10 | Jds Uniphase Corporation | Pulsed laser apparatus and method |
US7450813B2 (en) * | 2006-09-20 | 2008-11-11 | Imra America, Inc. | Rare earth doped and large effective area optical fibers for fiber lasers and amplifiers |
EP2249443B1 (en) * | 2008-02-19 | 2020-07-08 | Fujikura Ltd. | Optical fiber laser |
KR100987386B1 (ko) * | 2008-05-15 | 2010-10-12 | 한국전자통신연구원 | 다중 공진 광섬유 레이저 시스템 |
US8441718B2 (en) * | 2009-11-23 | 2013-05-14 | Lockheed Martin Corporation | Spectrally beam combined laser system and method at eye-safer wavelengths |
US20110134940A1 (en) * | 2009-12-08 | 2011-06-09 | Schlumberger Technology Corporation | Narrow linewidth brillouin laser |
JP2012129423A (ja) | 2010-12-16 | 2012-07-05 | Fujikura Ltd | ファイバレーザ及びファイバレーザの連続光発振方法 |
JP2012164860A (ja) * | 2011-02-08 | 2012-08-30 | Fujikura Ltd | Qスイッチ式ファイバレーザ |
WO2013024812A1 (ja) | 2011-08-12 | 2013-02-21 | 株式会社フジクラ | 発光装置 |
WO2013038794A1 (ja) * | 2011-09-12 | 2013-03-21 | 古河電気工業株式会社 | 光ファイバ、光ファイバレーザおよび光ファイバ増幅器、ならびに光ファイバの製造方法 |
JP5815844B2 (ja) | 2012-03-28 | 2015-11-17 | 株式会社フジクラ | ファイバ光学系、及び、その製造方法 |
JP6037711B2 (ja) * | 2012-08-08 | 2016-12-07 | 株式会社フジクラ | ファイバレーザ装置 |
US8995478B1 (en) * | 2014-04-08 | 2015-03-31 | Tekhnoscan-Lab LLC | Passively mode-locked pulsed fiber laser |
JP6154364B2 (ja) | 2014-10-28 | 2017-06-28 | 株式会社フジクラ | ファイバレーザ装置 |
EP3064992B1 (de) * | 2015-03-06 | 2021-09-22 | Baden-Württemberg Stiftung gGmbH | Optisches system und verfahren |
JP2016171208A (ja) | 2015-03-12 | 2016-09-23 | 株式会社フジクラ | 光ファイバ、ファイバアンプ、及びファイバレーザ |
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US11070021B2 (en) | 2021-07-20 |
EP3531513A4 (en) | 2020-06-03 |
CN109845053A (zh) | 2019-06-04 |
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