JP2010062568A - 超短パルス発生用の8の字型ファイバレーザ - Google Patents
超短パルス発生用の8の字型ファイバレーザ Download PDFInfo
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- 239000000835 fiber Substances 0.000 title claims abstract description 94
- 230000010287 polarization Effects 0.000 claims abstract description 45
- 238000009825 accumulation Methods 0.000 claims abstract description 3
- 230000003287 optical effect Effects 0.000 claims description 50
- 230000002457 bidirectional effect Effects 0.000 claims description 26
- 230000001902 propagating effect Effects 0.000 claims description 15
- 230000003321 amplification Effects 0.000 claims description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 229910052691 Erbium Inorganic materials 0.000 claims description 6
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical group [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 description 8
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- 238000004891 communication Methods 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
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- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
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- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
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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
- H01S3/06791—Fibre ring lasers
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
- H01S3/1112—Passive mode locking
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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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06712—Polarising fibre; Polariser
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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
- H01S3/07—Construction or shape of active medium consisting of a plurality of parts, e.g. segments
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/1061—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using a variable absorption device
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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
- H01S3/14—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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Abstract
【解決手段】偏波保持8の字型(PMFE)ファイバレーザはファイバレーザの双方向ループ中に意図的に(位相のバイアスの形で)非対称を挿入することにより、超短(フェムト秒)出力パルスを発生させるように構成される。(非対称の結合器、接合、減衰器、ファイバの曲げ、多重増幅部、あるいは類似のものによる)非対称の導入はモードロックを生成し、超短出力パルスを発生させるために十分な双方向ループ内への位相差の蓄積を可能にする。
【選択図】図3
Description
2、22 第一のループ
3 ドープファイバ
5 50:50方向性結合器
6、28、60、60B ポンプ光源
7 結合器
8 アイソレータ
9 出力用方向性結合器
10、11 機械的偏波コントローラ
20、50 PMFEファイバレーザ
24、58 エルビウムドープ偏波保持ファイバ
26 第一の入力カプラ
36 第二のループ
40 偏波保持インライン光アイソレータ
42 偏波保持50:50出力結合器
44 偏波保持変調器
46 外部駆動源
48、58B エルビウムドープファイバ
52 双方向ファイバループ
54 単一方向ファイバループ
56 光スプリッタ/カプラ
62、62B WDM要素
70 光損失要素
70−1、70A 非線形スプリッタ
70−2 光減衰器
70−3 出力カプラ
70B 増幅用構成
Claims (9)
- 超短光出力パルスを発生させるためのモードロック偏波保持8の字型ファイバレーザであって、
レーザが偏波保持光ファイバからなる双方向ループと、
偏波保持光ファイバからなる単一方向ループと、
前記双方向ループおよび前記単一方向ループのいずれか一つに沿って挿入される偏波保持増幅媒体の第一の部分とを含み、前記増幅媒体は、入射する光ポンプ信号に応答して、伝播する光信号の増幅されたものを発生し、さらに、
前記偏波保持ファイバの双方向および単一方向ループの両方の間に配されかつ結合された偏波保持方向性結合器を含み、前記伝播する光信号の保持された偏波状態が、安定かつ一定であるモードロック状態を提供するものであり、さらに、
前記超短光出力パルスを発生させるのに十分な、前記伝播する信号の間に位相差の蓄積を生成する、前記双方向ループに沿って配される光損失要素を含むことを特徴とするファイバレーザ。 - 前記偏波保持増幅媒体が偏波保持ファイバ増幅器からなることを特徴とする請求項1に記載のファイバレーザ。
- 前記偏波保持ファイバ増幅器がエルビウムドープファイバ増幅器からなることを特徴とする請求項2に記載のファイバレーザ。
- 前記偏波保持増幅媒体が半導体光増幅器からなることを特徴とする請求項1に記載のファイバレーザ。
- さらに前記レーザが伝播する光信号に微小変動を導入し、モードロックを開始させるために外部の微小変動源からなることを特徴とする請求項1に記載のファイバレーザ。
- 前記外部の微小変動源が前記伝播する光信号に変調の微小変動を導入するための偏波保持変調要素、およびそれに入力変調信号を供給するために前記変調要素に結合された外部駆動源とからなることを特徴とする請求項5に記載のファイバレーザ。
- 前記光損失要素が前記双方向ループおよび前記単一方向ループとの間に配される非対称の方向性結合器からなることを特徴とする請求項1に記載のファイバレーザ。
- 前記光損失要素がモードロック条件を生成するために十分な減衰量をもたらすために前記双方向ループに沿って挿入される光減衰器からなることを特徴とする請求項1に記載のファイバレーザ。
- 前記光損失要素が前記ファイバレーザに沿って配される前記偏波保持増幅媒体の第二の部分からなり、その場合において、前記偏波保持増幅媒体の第一および第二の部分の利得がモードロックを生成し、かつ前記超短光出力パルスを発生させるために十分な位相差を生成するように調節されることからなることを特徴とする請求項1に記載のファイバレーザ。
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US12/231,803 | 2008-09-05 | ||
US12/231,803 US7940816B2 (en) | 2008-09-05 | 2008-09-05 | Figure eight fiber laser for ultrashort pulse generation |
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JP2010062568A true JP2010062568A (ja) | 2010-03-18 |
JP2010062568A5 JP2010062568A5 (ja) | 2011-03-10 |
JP5489208B2 JP5489208B2 (ja) | 2014-05-14 |
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US (1) | US7940816B2 (ja) |
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JP (1) | JP5489208B2 (ja) |
CN (1) | CN101667711B (ja) |
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JP2019201208A (ja) * | 2018-05-18 | 2019-11-21 | オーエフエス ファイテル,エルエルシー | 自己起動型受動モードロック8の字ファイバレーザ |
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JP2019201208A (ja) * | 2018-05-18 | 2019-11-21 | オーエフエス ファイテル,エルエルシー | 自己起動型受動モードロック8の字ファイバレーザ |
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US7940816B2 (en) | 2011-05-10 |
EP2161797A2 (en) | 2010-03-10 |
CN101667711A (zh) | 2010-03-10 |
EP2161797A3 (en) | 2012-02-08 |
US20100061407A1 (en) | 2010-03-11 |
JP5489208B2 (ja) | 2014-05-14 |
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EP2161797B1 (en) | 2020-05-06 |
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