JP4974161B2 - 光ファイバデバイス - Google Patents
光ファイバデバイス Download PDFInfo
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- JP4974161B2 JP4974161B2 JP2007196642A JP2007196642A JP4974161B2 JP 4974161 B2 JP4974161 B2 JP 4974161B2 JP 2007196642 A JP2007196642 A JP 2007196642A JP 2007196642 A JP2007196642 A JP 2007196642A JP 4974161 B2 JP4974161 B2 JP 4974161B2
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
-
- 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
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29371—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion
- G02B6/29374—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion in an optical light guide
- G02B6/29376—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion in an optical light guide coupling light guides for controlling wavelength dispersion, e.g. by concatenation of two light guides having different dispersion properties
- G02B6/29377—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion in an optical light guide coupling light guides for controlling wavelength dispersion, e.g. by concatenation of two light guides having different dispersion properties controlling dispersion around 1550 nm, i.e. S, C, L and U bands from 1460-1675 nm
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/2525—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using dispersion-compensating fibres
- H04B10/25253—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using dispersion-compensating fibres with dispersion management, i.e. using a combination of different kind of fibres in the transmission system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/58—Compensation for non-linear transmitter output
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3528—Non-linear optics for producing a supercontinuum
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
- G02F1/3536—Four-wave interaction
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/355—Non-linear optics characterised by the materials used
- G02F1/3555—Glasses
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/365—Non-linear optics in an optical waveguide structure
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/16—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 series; tandem
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/04—Function characteristic wavelength independent
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/26—Pulse shaping; Apparatus or methods therefor
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Description
図1は、本発明の実施の形態1に係る光ファイバデバイスを用いたSC光源の概略構成を示すブロック図である。図1に示すように、このSC光源10は、所定の中心波長のパルス光を出力するパルス光源1と、パルス光源1に接続し、パルス光源1が出力したパルス光を増幅する光増幅器2と、光増幅器2に接続し、光増幅器2が増幅したパルス光の入力を受け付けて、波長帯域が拡張されたパルス光であるSC光を出力する光ファイバデバイス3とを備える。
なお、比屈折率差は、各コア部31a、31bの屈折率の最高部の値をn1、各クラッド部31b、32bの屈折率をnc、としたとき、式(1)により定義される。
Δ={(n1−nc)/nc}×100 ・・・・・ (1)
つぎに、本発明の実施の形態2に係る光ファイバデバイスについて説明する。本実施の形態2に係る光ファイバデバイスは、3段の光ファイバが、該光ファイバの波長分散の絶対値がパルス光の入力端側から該入力端側と出力端との間の所定の位置に向かって増加し、この所定の位置から出力端側に向かって減少するように接続されている。
以下、本発明に係る光ファイバデバイスの実施例および比較例を詳細に説明する。なお、この実施例および比較例によりこの発明が限定されるものではない。
はじめに、連続光を入力した場合の各実施例、比較例の光ファイバデバイスのSBSの特性について説明する。図7〜9は、それぞれ比較例1〜3の光ファイバデバイスに波長1550nmの連続光を入力した場合に発生するブリユアン散乱光スペクトルを示す図である。なお、図7〜9のいずれにおいても、横軸はブリユアンシフト周波数を示し、縦軸は相対的なブリユアンゲインを示す。図7〜9に示すように、比較例1〜3の光ファイバデバイスは、比屈折率差が異なるので、ブリユアン散乱光スペクトルにおいて異なる周波数のブリユアンピークを有していた。
Leff={1−exp(−αL)}/α ・・・ (3)
α=(ln10/10)a ・・・ (4)
ただし、Aeff;有効断面積、K;偏光状態に依存するパラメータ(入射光と散乱光が互いに平行な時はK=1、完全にランダムな時はK=2)、L;全長、Leff;有効長、ΔνB;ブリユアンピークのスペクトル幅、Δν;入力光のスペクトル線幅、gB;ピークにおけるブリユアン利得係数、α;損失係数(単位;/km)、a;損失係数(単位;dB/km)である。
つぎに、パルス光を入力した場合の各実施例、比較例の光ファイバデバイスのSBSの特性について説明する。はじめに、図6に示すファイバ番号1の光ファイバを長さ4880mとしたものをテスト光ファイバとして準備した。そして、このテスト光ファイバに、中心波長1550nm、パルス幅2.0ps、繰り返し周波数10GHzのパルス光を入力した場合のSBSしきい値を測定したところ、18.1dBmであった。この結果から、上述した式(2)を用いて、長さが200m、400m、600mの場合のそれぞれのSBSしきい値を計算したところ、その値は、それぞれ29.9dBm、27.0dBm、25.3dBmであった。この値を、図10に示した連続光を入力した場合のSBSしきい値と比較すると、全長が同じ条件では、パルス光入力の場合は、連続光入力の場合に比べ13.2dB程度SBSしきい値が高くなることが分かる。
つぎに、本発明の実施例、比較例の光ファイバデバイスにパルス光を入力した場合に発生するSC光の特性について、シミュレーション計算の結果を用いて説明する。図14は、実施例1−2、2−2および比較例1−2〜1−4の光ファイバデバイスの波長1550nmにおける波長分散特性を示す図である。
2 光増幅器
3、4 光ファイバデバイス
3a、4a 入力端
3b、4b 出力端
10 SC光源
31、41 第1段光ファイバ
32、42 第2段光ファイバ
31a、32a コア部
31b、32b クラッド部
43 第3段光ファイバ
Claims (4)
- 所定の中心波長を有するパルス光の入力を受け付け該入力したパルス光よりも波長帯域が拡張されたパルス光を出力する光ファイバデバイスであって、
直列に接続され、前記中心波長における波長分散値が負である複数の光ファイバを備え、前記複数の光ファイバは、クラッド部に対するコア部の比屈折率差が互いに異なるとともに、前記中心波長における波長分散の絶対値が前記パルス光の入力端側から出力端側に向かって増加し、且つ前記比屈折率差が前記パルス光の入力端側から出力端側に向かって減少するように接続されている
ことを特徴とする光ファイバデバイス。 - 所定の中心波長を有するパルス光の入力を受け付け該入力したパルス光よりも波長帯域が拡張されたパルス光を出力する光ファイバデバイスであって、
直列に接続され、前記中心波長における波長分散値が負である複数の光ファイバを備え、前記複数の光ファイバは、クラッド部に対するコア部の比屈折率差が互いに異なるとともに、前記中心波長における波長分散の絶対値が前記パルス光の入力端側から該入力端と出力端との間の所定の位置に向かって増加し、前記所定の位置から前記出力端側に向かって減少するように接続されている
ことを特徴とする光ファイバデバイス。 - 前記複数の光ファイバは、前記比屈折率差が前記パルス光の入力端側から出力端側に向かって減少するように接続されていることを特徴とする請求項2に記載した光ファイバデバイス。
- 前記複数の光ファイバは、前記比屈折率差が2%以上であることを特徴とする請求項1〜3のいずれか1つに記載した光ファイバデバイス。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007196642A JP4974161B2 (ja) | 2007-07-27 | 2007-07-27 | 光ファイバデバイス |
US12/168,374 US7630607B2 (en) | 2007-07-27 | 2008-07-07 | Optical fiber device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2007196642A JP4974161B2 (ja) | 2007-07-27 | 2007-07-27 | 光ファイバデバイス |
Publications (2)
Publication Number | Publication Date |
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JP2009031605A JP2009031605A (ja) | 2009-02-12 |
JP4974161B2 true JP4974161B2 (ja) | 2012-07-11 |
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JP2007196642A Active JP4974161B2 (ja) | 2007-07-27 | 2007-07-27 | 光ファイバデバイス |
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US (1) | US7630607B2 (ja) |
JP (1) | JP4974161B2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100150507A1 (en) * | 2008-12-15 | 2010-06-17 | Furukawa Electric Co., Ltd. | Holey fiber |
US20110091176A1 (en) * | 2009-08-03 | 2011-04-21 | Furukawa Electric Co., Ltd. | Holey fibers |
JP2011033899A (ja) * | 2009-08-03 | 2011-02-17 | Furukawa Electric Co Ltd:The | ホーリーファイバ |
RU2013129780A (ru) * | 2010-12-07 | 2015-01-20 | Эколь Политекник Федераль Де Лозанн (Епфл) | Оптическое волокно со сниженным влиянием нелинейных эффектов |
US9337939B2 (en) * | 2012-09-28 | 2016-05-10 | Intel Corporation | Optical IO interconnect having a WDM architecture and CDR clock sharing receiver |
WO2024120709A1 (en) * | 2022-12-07 | 2024-06-13 | Asml Netherlands B.V. | Supercontinuum radiation source |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3558499B2 (ja) * | 1996-07-24 | 2004-08-25 | 住友電気工業株式会社 | 光ファイバ、光源装置及びシステム |
JP3418086B2 (ja) * | 1997-05-09 | 2003-06-16 | 住友電気工業株式会社 | 波長分割多重伝送用光伝送路およびその構成方法 |
CN1299540A (zh) * | 1998-05-01 | 2001-06-13 | 康宁股份有限公司 | 具有分布式放大的色散控制光学波导和系统 |
JP2001091761A (ja) * | 1999-09-27 | 2001-04-06 | Sumitomo Electric Ind Ltd | 光ファイバ伝送路 |
US6473550B1 (en) * | 1999-09-27 | 2002-10-29 | Sumitomo Electric Industries, Ltd. | Optical fiber transmission-line |
EP1271193A4 (en) * | 2000-02-24 | 2005-07-06 | Sumitomo Electric Industries | OPTICAL TRANSMISSION LINE AND OPTICAL TRANSMISSION SYSTEM THEREWITH |
US6400877B1 (en) * | 2000-09-01 | 2002-06-04 | Sumitomo Electric Industries, Ltd. | Negative-dispersion optical fiber and optical transmission line incorporating the same |
JP4372330B2 (ja) * | 2000-10-30 | 2009-11-25 | 富士通株式会社 | 分布型光増幅装置、光通信用の局および光通信システム |
US6526208B1 (en) * | 2000-11-27 | 2003-02-25 | Nortel Networks Limited | Dispersion managed fiber optic cable and system |
JP2002299738A (ja) * | 2001-03-29 | 2002-10-11 | Toshiba Corp | 光伝送システム |
JP3869305B2 (ja) * | 2001-07-26 | 2007-01-17 | 古河電気工業株式会社 | 光伝送路 |
JP2004240390A (ja) * | 2002-12-10 | 2004-08-26 | Sumitomo Electric Ind Ltd | 光ファイバ |
JP2005331818A (ja) * | 2004-05-21 | 2005-12-02 | Fujikura Ltd | 高非線形性光ファイバとその製造方法およびその利用 |
WO2006106669A1 (ja) * | 2005-03-31 | 2006-10-12 | Sumitomo Electric Industries, Ltd. | 光源装置 |
-
2007
- 2007-07-27 JP JP2007196642A patent/JP4974161B2/ja active Active
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2008
- 2008-07-07 US US12/168,374 patent/US7630607B2/en not_active Expired - Fee Related
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Publication number | Publication date |
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US7630607B2 (en) | 2009-12-08 |
US20090028509A1 (en) | 2009-01-29 |
JP2009031605A (ja) | 2009-02-12 |
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