JP2004104782A - 複数モードのファイバと切り換え可能なモード変換器を備えた調節可能な分散補償装置 - Google Patents
複数モードのファイバと切り換え可能なモード変換器を備えた調節可能な分散補償装置 Download PDFInfo
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- JP2004104782A JP2004104782A JP2003312229A JP2003312229A JP2004104782A JP 2004104782 A JP2004104782 A JP 2004104782A JP 2003312229 A JP2003312229 A JP 2003312229A JP 2003312229 A JP2003312229 A JP 2003312229A JP 2004104782 A JP2004104782 A JP 2004104782A
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- 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
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- 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
- H04B10/25133—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion including a lumped electrical or optical dispersion compensator
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- 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
- G02B6/10—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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- 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
- G02B6/29379—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 characterised by the function or use of the complete device
- G02B6/29395—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 characterised by the function or use of the complete device configurable, e.g. tunable or reconfigurable
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Optical Communication System (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
【解決手段】基本的装置構造は、基本モードならびに1つまたは複数の高次モード(HOM)をサポートするファイバの2つ以上の区画を有する。HOMファイバは切り換え可能な空間モード変換器(MC)によって互いに接続される。MCは、例えば、長周期ファイバ・グレーティング(LPG)、結合型導波路装置、自由空間位相遅延素子、微小電子機械装置、または音響−光学結合器で作製されることが可能である。MCは、入来するいかなる空間モードもHOMファイバ内でいずれか1つの他の導波モードに変換するように組み立てられる。切り換えは、歪力、温度、電子−光学もしくは非線形光学効果、あるいはMCを組み立てるのに使用される光学材料の屈折率を変えるいかなる他の物理的効果によっても達成される。
【選択図】図1
Description
ここでDAHOMはAHOMによって生じる全体的分散であり、Dk(i)はファイバのk番目のモードの分散であり、k(i)は切り換え構成であってそれが、どのMCが光をそのk番目のモードへと切り換えるかを決定する(kは1からファイバによってサポートされる異なる分散値のモードの数、Mまでの値をとる)。
ng=n−λdn/dλ (2)
で表わすことが可能であり、ここでngは群屈折率、nは屈折率、λは波長である。
Dmax=D01×Ltotal=+67.599ps/nm (3)
Dmin=D02×Ltotal=−532.035ps/nm (4)
ここでDminとDmaxはそれぞれ、図4に例示したAHOMが生じることのできる最小および最大の分散値である。したがって、この装置の分散調整のための最小過程サイズDstepは以下となる。
DAHOM=Dmax−(d×Dstep) (6)
で与えられる。
Claims (16)
- a.少なくとも第1のコア導波モードと第2のコア導波モードをサポートし、長さL1を有する第1所定長光ファイバ、
b.少なくとも第1のコア導波モードと第2のコア導波モードをサポートし、長さL2を有する第2所定長光ファイバ、
c.第1のコア導波モードと第2のコア導波モードの間で光を変換するためにL1の入力部に結合された第1のモード変換器(MC)手段、
d.第1のコア導波モードと第2のコア導波モードの間で光を変換するためにL1の出力部とL2の入力部の間に結合された第2のMC手段、
e.第1のコア導波モードと第2のコア導波モードの間で光を変換するためにL2の出力部に結合された第3のMC手段、
f.およびMC手段の各々を、コア導波モードを通す状態から第1のコア導波モードと第2のコア導波モードの間の変換を行なう状態へと独立して切り換える手段を含む光学装置。 - L1とL2が等しくない、請求項1に記載の光学装置。
- 各所定長光ファイバ中の第1のコア導波モードが同じモードに相当する、請求項1に記載の光学装置。
- a.各所定長ファイバが少なくとも2つのコア導波モードをサポートする、所定長L1〜LNの光ファイバの列、
b.L1〜LN列の間で交互に位置するモード変換器(MC)のMC1〜MCN+1の列、
c.各MCを、コア導波モードを通す状態からコア導波モードの変換を行なう状態へと独立して切り換える手段を含む光学装置。 - 所定長L1〜LNの光ファイバの列が異なる長さを有し、それらの長さがL1の倍数である、請求項4に記載の光学装置。
- 各々のモード変換器が、
i.TAPを有し、かつ少なくとも第1のコア導波モードと第2のコア導波モードを有する所定長の光ファイバ、
ii.第1のコア導波モードの光を第2のコア導波モードへと変換し、かつ該所定長光ファイバ内でLPGを含む手段、および
iii.該所定長光ファイバの少なくとも一部分の屈折率を調節する手段を有する、請求項4に記載の光学装置。 - LPGがグレーティング周期Λを有し、かつΛが5%以内までTAPに相当する、請求項6に記載の光学装置。
- MCを切り換えるための手段が温度制御手段である、請求項4に記載の光学装置。
- MCを切り換えるための手段が歪力である、請求項4に記載の光学装置。
- MCを切り換えるための手段が非線形光学の手段である、請求項4に記載の光学装置。
- MCを切り換えるための手段が音響−光学の手段である、請求項4に記載の光学装置。
- MCを切り換えるための手段が応力−光学の手段である、請求項4に記載の光学装置。
- MCを切り換えるための手段が電子−光学の手段である、請求項4に記載の光学装置。
- 請求項4に記載の光学装置と組み合わせになった伝送ファイバを有する光通信システム。
- 請求項4に記載の光学装置と組み合わせになった伝送ファイバを有し、さらに静的分散補償装置を有する光通信システム。
- 光学的受信装置が静的分散補償装置と組み合わせになった請求項4に記載の光学装置を有し、光検出器がその後に続く光通信システム。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US10/234,287 US6937788B2 (en) | 2002-09-04 | 2002-09-04 | Adjustable dispersion compensator with few mode fibers and switchable mode converters |
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JP2004104782A true JP2004104782A (ja) | 2004-04-02 |
JP2004104782A5 JP2004104782A5 (ja) | 2005-05-26 |
JP3875673B2 JP3875673B2 (ja) | 2007-01-31 |
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JP2003312229A Expired - Fee Related JP3875673B2 (ja) | 2002-09-04 | 2003-09-04 | 複数モードのファイバと切り換え可能なモード変換器を備えた調節可能な分散補償装置 |
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US (1) | US6937788B2 (ja) |
EP (1) | EP1396742B1 (ja) |
JP (1) | JP3875673B2 (ja) |
KR (1) | KR100941983B1 (ja) |
CN (1) | CN1497279B (ja) |
AU (1) | AU2003244566B2 (ja) |
CA (1) | CA2437877C (ja) |
DE (1) | DE60314210T2 (ja) |
IL (1) | IL157502A (ja) |
Cited By (6)
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JP2013214852A (ja) * | 2012-04-02 | 2013-10-17 | Nippon Telegr & Teleph Corp <Ntt> | 光ファイバ伝送システム及び光ファイバ伝送方法 |
JP2014526815A (ja) * | 2011-06-30 | 2014-10-06 | オーエフエス ファイテル,エルエルシー | マルチモード伝送システムにおいてモードの群遅延を低減する方法 |
JP2015026742A (ja) * | 2013-07-26 | 2015-02-05 | 日本電信電話株式会社 | 光増幅器 |
JP2015516738A (ja) * | 2012-03-30 | 2015-06-11 | アルカテル−ルーセント | モード分割多重方式を使用する光データ伝送の方法 |
WO2019026906A1 (ja) * | 2017-08-01 | 2019-02-07 | 日本電信電話株式会社 | 光ファイバ及び光伝送システム |
JP2019191224A (ja) * | 2018-04-18 | 2019-10-31 | 日本電信電話株式会社 | モード交換器 |
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US7519295B2 (en) * | 2003-10-30 | 2009-04-14 | Tyco Telecommunications (Us) Inc. | Apparatus and method for commissioning an optical transmission system |
US7177510B2 (en) * | 2004-08-09 | 2007-02-13 | Fitel Usa Corp. | Polarization insensitive microbend fiber gratings and devices using the same |
JP2006145757A (ja) * | 2004-11-18 | 2006-06-08 | Fujitsu Ltd | 分散補償器 |
US20070206910A1 (en) * | 2006-03-04 | 2007-09-06 | Siddharth Ramachandran | Optical fibers and optical fiber devices with total dispersion greater than material dispersion |
JP4826462B2 (ja) * | 2006-12-20 | 2011-11-30 | 株式会社日立製作所 | 分散補償器、光伝送システム及び光伝送方法 |
US8520299B2 (en) * | 2007-02-05 | 2013-08-27 | OFS Fitec, LLC | Selectively pumping a gain-doped region of an optical fiber |
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US8958703B2 (en) | 2011-03-04 | 2015-02-17 | Alcatel Lucent | Multipath channel for optical subcarrier modulation |
JP6046717B2 (ja) * | 2011-08-10 | 2016-12-21 | オーエフエス ファイテル,エルエルシー | モード変換を用いる少モード化ファイバデバイス |
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2002
- 2002-09-04 US US10/234,287 patent/US6937788B2/en not_active Expired - Lifetime
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2003
- 2003-08-19 CA CA2437877A patent/CA2437877C/en not_active Expired - Fee Related
- 2003-08-20 IL IL157502A patent/IL157502A/en active IP Right Grant
- 2003-09-02 EP EP03019933A patent/EP1396742B1/en not_active Expired - Fee Related
- 2003-09-02 DE DE60314210T patent/DE60314210T2/de not_active Expired - Lifetime
- 2003-09-03 CN CN031581056A patent/CN1497279B/zh not_active Expired - Fee Related
- 2003-09-04 AU AU2003244566A patent/AU2003244566B2/en not_active Ceased
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Cited By (10)
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JP2014526815A (ja) * | 2011-06-30 | 2014-10-06 | オーエフエス ファイテル,エルエルシー | マルチモード伝送システムにおいてモードの群遅延を低減する方法 |
JP2015516738A (ja) * | 2012-03-30 | 2015-06-11 | アルカテル−ルーセント | モード分割多重方式を使用する光データ伝送の方法 |
JP2013214852A (ja) * | 2012-04-02 | 2013-10-17 | Nippon Telegr & Teleph Corp <Ntt> | 光ファイバ伝送システム及び光ファイバ伝送方法 |
JP2015026742A (ja) * | 2013-07-26 | 2015-02-05 | 日本電信電話株式会社 | 光増幅器 |
WO2019026906A1 (ja) * | 2017-08-01 | 2019-02-07 | 日本電信電話株式会社 | 光ファイバ及び光伝送システム |
JPWO2019026906A1 (ja) * | 2017-08-01 | 2020-04-23 | 日本電信電話株式会社 | 光ファイバ及び光伝送システム |
US11156767B2 (en) | 2017-08-01 | 2021-10-26 | Nippon Telegraph And Telephone Corporation | Optical fiber and optical transmission system |
JP6989793B2 (ja) | 2017-08-01 | 2022-02-03 | 日本電信電話株式会社 | 光伝送システム |
JP2019191224A (ja) * | 2018-04-18 | 2019-10-31 | 日本電信電話株式会社 | モード交換器 |
JP7061771B2 (ja) | 2018-04-18 | 2022-05-02 | 日本電信電話株式会社 | モード交換器 |
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Publication number | Publication date |
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CN1497279A (zh) | 2004-05-19 |
CA2437877C (en) | 2011-10-25 |
IL157502A0 (en) | 2004-03-28 |
DE60314210D1 (de) | 2007-07-19 |
KR100941983B1 (ko) | 2010-02-16 |
EP1396742A2 (en) | 2004-03-10 |
IL157502A (en) | 2008-06-05 |
CN1497279B (zh) | 2010-05-26 |
JP3875673B2 (ja) | 2007-01-31 |
EP1396742B1 (en) | 2007-06-06 |
US6937788B2 (en) | 2005-08-30 |
US20040047551A1 (en) | 2004-03-11 |
AU2003244566B2 (en) | 2008-11-13 |
DE60314210T2 (de) | 2008-02-14 |
KR20040021562A (ko) | 2004-03-10 |
AU2003244566A1 (en) | 2004-03-25 |
CA2437877A1 (en) | 2004-03-04 |
EP1396742A3 (en) | 2004-06-02 |
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