JP4520700B2 - 波長分割多重化システムに対する信号付加 - Google Patents
波長分割多重化システムに対する信号付加 Download PDFInfo
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- 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
- G02F1/01—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 for the control of the intensity, phase, polarisation or colour
- G02F1/015—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 for the control of the intensity, phase, polarisation or colour based on semiconductor elements having potential barriers, e.g. having a PN or PIN junction
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- G02B6/12009—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
- G02B6/12019—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides characterised by the optical interconnection to or from the AWG devices, e.g. integration or coupling with lasers or photodiodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
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- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
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- H04Q2011/0035—Construction using miscellaneous components, e.g. circulator, polarisation, acousto/thermo optical
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Description
波長分割多重化(WDM)トラフィックを搬送する単一モード光ファイバと、
前記単一モード光ファイバに対して付加されるチャネルからの信号を結合するために配置される伝送ファイバカプラ−と、
さらに、前記チャネルを接続して光アンプの前記入力に加えられるために前記信号を搬送するための結合手段と
を含んでいる電気通信システムにおいて、
前記アンプの出力が、信号の波長を有する信号のみを低損失で通過するように配置される切り替え可能な多帯域の帯域消去フィルタによって前記伝送ファイバカプラ−に対して連続して接続されており、前記WDMトラフィックに対して加えられ、前記WDMトラフィックに加えられる信号の前記波長を有しない波長で前記信号を減衰させる電気通信システムを提供する。
図1(a)は、柔軟性を提供しない。
図1(b)は、高損失を導くため、より高い出力に調整可能なレーザ源を必要とする。
図1(c)は、図1(a)のように柔軟性を提供しない。低クロストークを有するスイッチも必要とする。
図1(d)は、図1(b)と同様の問題を有する。
図1(e)は、柔軟性は提供するが、広範には利用できなく、1チャネルのみを加える時でさえ、提供されなければならないn×nのスイッチを必要とする。
図1(f)は、前記損失を克服するアンプを有するが、チャネルを‘通す’経路に対して増幅自然放出光ノイズを導くため、前記システムの性能を妥協して処理することになる。
ASE:増幅自然放出光−光アンプから加えられたノイズ
AWG:アレイ導波路−これらは、光多重化及び多重分離のために設計された回路における光導波路であり、分散波長分離を達成するために干渉を利用する。
MUX:多重化装置−幾つかの信号チャネルを1つに結合するための装置。
OSNR:光信号対雑音比
Channel:これは、単一レーザから変調された光キャリアを意味するのに用いられている。前記レーザ波長は、標準グリッド、例えばITU 100GH又は50GHz標準グリッド内で特定の許容差に適合させるために選択されている。
波長:これは、特定の値及び1チャネルの波長帯域を包含するのに用いられている。
トラフィック:一般に、伝送システムによって搬送されるデータ及びアナログ信号を指す。
飽和性フィルタ:低減衰で材料吸収を変化させるのに十分な出力を有する光ビームを通過させるフィルタであり、低出力密度のビームを減衰させる。吸収における変化は、可逆であり、物理的なホールバーニングのような実際の損傷によってもたらされないということが必要である。
M.K.Smit:”New focusing and dispersive planar component based on an optical phased array”, Electronics Letters, vol.24, no.7, pp.385-386, Mar.1998.
A.R.Vellekoop and M.K.Smit:”Four-channel integrated-optic wavelength demultiplexer with weak polarization dependence”, Journal of Lightwave Technology, vol.9, no.3, pp.310-314, Mar.1991.
C.Dragone:”An NxN optical multiplexer using a planar arrangement of two star couplers”, Photonics Technology Letter, vol.3, no.9, pp.812-815, Sept.1991.
Claims (20)
- 波長分割多重(WDM)トラフィックを搬送している単一モード光ファイバと、
チャネルから前記単一モード光ファイバへ加えられる信号を結合するために配置された伝送ファイバカプラ−と、
さらに、光アンプの入力に対して加えられる前記信号を搬送している前記チャネルを接続するための結合手段と、を含んでいる通信システムであって、
前記WDMトラフィックに加えられることになる波長の信号を有する信号のみを低損失で通過させると共に前記WDMトラフィックに加えられることになる前記波長の信号を有していない波長の全信号を減衰させるために配置されている切り替え可能な多帯域の帯域消去フィルタによって、前記光アンプの出力は前記伝送ファイバカプラ−に対して直列に接続されている通信システム。 - 前記帯域消去フィルタが、増幅自然放出光(ASE)の結果として発生する信号を減衰させるために配置されている請求項1に記載の通信システム。
- 前記切り替え可能な多帯域の帯域消去フィルタが、直列のファイバブラッグ回折格子フィルタを含んでいる請求項1又は2に記載の通信システム。
- 前記切り替え可能な多帯域の帯域消去フィルタが、選択的狭帯域通過フィルタの積層と、選択されたチャネルを通過させるためにそれぞれのフィルタを置き換える駆動器手段とを含んでいる請求項1又は2に記載の通信システム。
- 前記切り替え可能な多帯域の帯域消去フィルタは、回折格子の積層を含んでおり、それぞれの回折格子が取り除かれるか、又は非作動的にされるか、又は選択されたチャネルを通過させるために作動的にされる請求項1又は2に記載の通信システム。
- 前記切り替え可能な多帯域の帯域消去フィルタが、
前記単一モードファイバによって搬送される前記信号の波長要素を空間的に分離するために配置されている光波長チャネル分波器と、
前記信号の分離された波長要素を遮断するため、及び前記WDMトラフィックに加えられる前記波長の信号を有する信号のみを低損失で通過させるため、及び前記WDMトラフィックに加えられる前記波長の信号を有していない波長の全信号を減衰させるために、配置されている飽和性(bleachable)反射器と、
を含んでいる請求項1又は2に記載の通信システム。 - 前記トラフィックを前記単一モード光ファイバに対して再結合するために配置されている多重化装置をさらに含んでいる請求項6に記載の通信システム。
- 前記飽和性(bleachable)反射器がエルビウムドープされたガラスを含んでいる請求項5又は6又は7に記載の通信システム。
- 前記飽和性(bleachable)反射器が熱作動飽和性(bleachable)媒体を含んでいる請求項6、7又は8に記載の通信システム。
- 前記熱作動が前記光信号によって提供されている請求項9に記載の通信システム。
- 前記熱作動が前記光信号の光子エネルギーによって提供されている請求項10に記載の通信システム。
- 前記飽和性(bleachable)反射器が半導体飽和性(bleachable)媒体を含んでいる請求項6に記載の通信システム。
- 前記半導体飽和性(bleachable)媒体が、ダブルへテロ構造の層に対するリン化インジウム層の間で覆われたテルル化カドミウム(Cadmium Telluride)、又はテルル化水銀カドミウム(Cadmium Mercury Telluride)、又はリン化ヒ化インジウムガリウム(Indium Gallium Arsenide Phosphide)、又はヒ化インジウムガリウム(Indium Gallium Arsenide)を含んでいる請求項9に記載の通信システム。
- 前記飽和性(bleachable)材料がInP又は広いギャップのInGaAsP層の間のGaInAs層の積層であって、前記飽和する(bleaching)閾値が各単一層の閾値であり、減衰量は多層を通る伝送の総量であることを特徴とする請求項10又は11に記載の通信システム。
- 前記多重化装置及び前記光波長チャネル分波器は、アレイ導波路(AWG)を含んでいる請求項7に記載の通信システム。
- 光循環器をさらに含んでいる請求項6から15のいずれか1つに記載の通信システム。
- 半導体飽和性(bleachable)媒体の積層を含み、それによって、前記飽和する(bleaching)閾値が各単一層の閾値であり、減衰量は前記積層を含む全ての層を通る伝送の総量であることを特徴とする請求項1に記載の通信システム。
- 前記飽和性(bleachable)材料がInP又はより広いギャップのInGaAsP層の間のGaInAs層の積層である請求項17に記載の通信システム。
- 前記通信システムはノードである請求項1から18のいずれか1つに記載の通信システム。
- 前記通信システムは通信ネットワークである請求項1から18のいずれか1つに記載の通信システム。
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GBGB0111822.3A GB0111822D0 (en) | 2001-05-15 | 2001-05-15 | Signal addition to a wave division multiplex system |
PCT/GB2002/000584 WO2002093806A1 (en) | 2001-05-15 | 2002-02-11 | Signal addition to a wave division multiplex system |
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US (1) | US7164816B2 (ja) |
EP (1) | EP1391069B1 (ja) |
JP (1) | JP4520700B2 (ja) |
CN (1) | CN1640043A (ja) |
AT (1) | ATE553557T1 (ja) |
CA (1) | CA2440442C (ja) |
DK (1) | DK1391069T3 (ja) |
GB (1) | GB0111822D0 (ja) |
WO (1) | WO2002093806A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2863727B1 (fr) * | 2003-12-12 | 2006-03-03 | Thales Sa | Systeme optronique actif laser a detective amelioree |
TWI563304B (en) * | 2012-05-22 | 2016-12-21 | Hon Hai Prec Ind Co Ltd | Laser signal transmitting device |
US10069562B2 (en) * | 2016-10-11 | 2018-09-04 | X Development Llc | Optical circulator for free space optical communication |
KR20200059356A (ko) * | 2018-11-20 | 2020-05-29 | 주식회사 오이솔루션 | 멀티채널 양방향 광통신 모듈 |
CN113376748B (zh) * | 2021-06-17 | 2022-08-02 | 中国科学院半导体研究所 | 集成硅基布拉格反射器的合分波器件及制备方法 |
Family Cites Families (14)
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JP2873856B2 (ja) * | 1990-04-03 | 1999-03-24 | キヤノン株式会社 | 光増幅器 |
EP0478060B1 (en) * | 1990-09-24 | 1995-12-06 | Philips Electronics Uk Limited | An optically switchable device |
JPH08237203A (ja) * | 1995-02-23 | 1996-09-13 | Fujitsu Ltd | 光フィルタアレイ、光送信機及び光送信システム |
JP3039347B2 (ja) * | 1995-12-27 | 2000-05-08 | 日立電線株式会社 | スイッチング機能を備えた光部品及びそれに使用する導波路型フィルタ |
JP4031853B2 (ja) * | 1997-10-20 | 2008-01-09 | 富士通株式会社 | 双方向光通信用光伝送装置 |
JP3259765B2 (ja) * | 1997-12-11 | 2002-02-25 | 住友電気工業株式会社 | 光入出力モジュール及び光反射器 |
US6122299A (en) | 1997-12-31 | 2000-09-19 | Sdl, Inc. | Angled distributed reflector optical device with enhanced light confinement |
JPH11266234A (ja) * | 1998-03-16 | 1999-09-28 | Alps Electric Co Ltd | 光通信装置 |
JP3639109B2 (ja) * | 1998-04-02 | 2005-04-20 | 富士通株式会社 | 光伝送装置、光伝送システム及び光端局 |
US6091869A (en) | 1998-04-30 | 2000-07-18 | Telefonaktiebolaget Lm Ericsson | Low loss, optical add/drop WDM node |
EP0967752A2 (en) * | 1998-06-24 | 1999-12-29 | Sumitomo Electric Industries, Ltd. | WDM transmission system |
JP3401189B2 (ja) * | 1998-07-03 | 2003-04-28 | 日本電信電話株式会社 | 光アド・ドロップ装置 |
EP1151569B1 (de) * | 1999-02-18 | 2009-11-18 | Nokia Siemens Networks Gmbh & Co. Kg | Add-drop-multiplexereinrichtung und optisches wellenlängen-multiplex-übertragungssystem |
US6947670B1 (en) * | 1999-06-30 | 2005-09-20 | Lucent Technologies Inc. | Optical add/drop arrangement for ring networks employing wavelength division multiplexing |
-
2001
- 2001-05-15 GB GBGB0111822.3A patent/GB0111822D0/en not_active Ceased
-
2002
- 2002-02-11 JP JP2002590558A patent/JP4520700B2/ja not_active Expired - Fee Related
- 2002-02-11 AT AT02711052T patent/ATE553557T1/de active
- 2002-02-11 CA CA2440442A patent/CA2440442C/en not_active Expired - Lifetime
- 2002-02-11 EP EP02711052A patent/EP1391069B1/en not_active Expired - Lifetime
- 2002-02-11 CN CNA028099605A patent/CN1640043A/zh active Pending
- 2002-02-11 WO PCT/GB2002/000584 patent/WO2002093806A1/en active Application Filing
- 2002-02-11 DK DK02711052.7T patent/DK1391069T3/da active
- 2002-02-11 US US10/472,665 patent/US7164816B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB0111822D0 (en) | 2001-07-04 |
EP1391069A1 (en) | 2004-02-25 |
WO2002093806A1 (en) | 2002-11-21 |
EP1391069B1 (en) | 2012-04-11 |
ATE553557T1 (de) | 2012-04-15 |
CN1640043A (zh) | 2005-07-13 |
US7164816B2 (en) | 2007-01-16 |
DK1391069T3 (da) | 2012-05-29 |
US20040151420A1 (en) | 2004-08-05 |
CA2440442C (en) | 2012-05-01 |
JP2004531960A (ja) | 2004-10-14 |
CA2440442A1 (en) | 2002-11-21 |
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