JP4746126B2 - 偏光解消されたwdmソース - Google Patents
偏光解消されたwdmソース Download PDFInfo
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- JP4746126B2 JP4746126B2 JP2009500911A JP2009500911A JP4746126B2 JP 4746126 B2 JP4746126 B2 JP 4746126B2 JP 2009500911 A JP2009500911 A JP 2009500911A JP 2009500911 A JP2009500911 A JP 2009500911A JP 4746126 B2 JP4746126 B2 JP 4746126B2
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- optical
- dgd
- polarization
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- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000010287 polarization Effects 0.000 claims description 77
- 230000003287 optical effect Effects 0.000 claims description 47
- 238000010561 standard procedure Methods 0.000 claims description 37
- 239000000835 fiber Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 6
- 230000002999 depolarising effect Effects 0.000 claims description 4
- 230000001934 delay Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 16
- 230000008901 benefit Effects 0.000 description 7
- 230000009022 nonlinear effect Effects 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 230000009021 linear effect Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 4
- 230000028161 membrane depolarization Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 230000001902 propagating effect Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 210000001520 comb Anatomy 0.000 description 2
- 230000002939 deleterious effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000035559 beat frequency Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
Images
Classifications
-
- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
- G02B6/278—Controlling polarisation mode dispersion [PMD], e.g. PMD compensation or emulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
-
- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2726—Optical coupling means with polarisation selective and adjusting means in or on light guides, e.g. polarisation means assembled in a light guide
- G02B6/274—Optical coupling means with polarisation selective and adjusting means in or on light guides, e.g. polarisation means assembled in a light guide based on light guide birefringence, e.g. due to coupling between light guides
-
- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
- G02B6/2786—Reducing the polarisation degree, i.e. depolarisers, scramblers, unpolarised output
-
- 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
- H04B10/2572—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to forms of polarisation-dependent distortion other than PMD
-
- 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
- H04B10/501—Structural aspects
- H04B10/506—Multiwavelength transmitters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Optical Communication System (AREA)
Description
Ex=axcos(ωt−kx(ω)z+δx)
Ey=aycos(ωt−ky(ω)z+δy)
s0=ax 2+ay 2
s1=ax 2−ay 2
s2=2axaycosδ
s3=2axaysinδ
ここで、δ=δy−δxである。正規化したSOPはベクトル
s0=<ax 2>+<ay 2>
s1=<ax 2>+<ay 2>
s2=<2axaycosδ>
s3=<2axaysinδ>
Claims (22)
- 波長分割多重(WDM)伝送システムのための光学装置であって、
各ソースが光ソース信号を提供する複数の光ソースと、
前記光ソース信号を多重化して偏光多重信号を形成するために前記光ソースに結合した偏光保持(PM)マルチプレクサと、
前記PMマルチプレクサの出力に結合した差分群遅延(DGD)要素とを備え、
前記DGD要素の長さは該DGD要素によって導入されるDGDが(1+2m)/2Δfであるように選択され、ここでΔfは前記複数の光ソースの少なくとも2つの間の周波数差であり、mは整数であり、それによって前記DGD要素が、各ソース信号について0.7より大きい時間平均偏光度(DOP)を保持しつつ前記多重信号を偏光解消する光学装置。 - 前記光ソースが、時間と共に各光ソース信号の周波数を変化させるようになっている、請求項1に記載の光学装置。
- 1つ以上の前記光信号がローディングチャネルである、請求項1または2に記載の光学装置。
- 前記DGD要素が複屈折要素である、請求項1〜3のいずれか1項に記載の光学装置。
- 前記DGD要素がPMファイバである、請求項4記載の光学装置。
- 前記PMファイバの高速および低速の軸が前記偏光多重信号の偏光状態に対して45度である、請求項5に記載の光学装置。
- 1つ以上の前記光ソースが連続波(CW)レーザーである、請求項1〜6のいずれか1項に記載の光学装置。
- DGD要素が、前記偏光解消多重信号中の隣接する光ソース信号の時間平均偏光状態(SOP)間の角度が、nが3以上の整数である時360/n度であるようになっている、請求項1〜7のいずれか1項に記載の光学装置。
- nが4に等しい、請求項8に記載の光学装置。
- mがゼロに等しい、請求項9に記載の光学装置。
- 前記光ソース信号が、異なる周波数のローディングチャネルの複数の群を備え、各群間の周波数差が各群内の周波数差より大きく、前記DGD要素が各群に異なる遅延を導入して前記多重信号を偏光解消する、請求項1〜10のいずれか1項に記載の光学装置。
- 光信号を処理する方法であって、
複数の光ソース信号を偏光保持マルチプレクサに通過させて偏光多重信号を形成するステップと、
前記多重信号を、DGD要素を含む光路に通過させるステップであって、前記DGD要素の長さは該DGD要素によって導入されるDGDが(1+2m)/2Δfであるように選択され、ここでΔfは前記複数の光ソースの少なくとも2つの間の周波数差であり、mは整数であり、それによって前記DGD要素が、各ソース信号について0.7より大きい時間平均偏光度(DOP)を保持しつつ前記多重信号を偏光解消するステップとを備える方法。 - 前記光ソースが、時間と共に各光ソース信号の周波数を変化させるようになっている、請求項12に記載の方法。
- 1つ以上の前記光信号がローディングチャネルである、請求項12または13に記載の方法。
- 前記DGD要素が複屈折要素である、請求項12〜14の何れかに記載の方法。
- 前記DGD要素がPMファイバである、請求項15に記載の方法。
- 前記PMファイバの高速および低速の軸が前記偏光多重信号の偏光状態に対して45度である、請求項16に記載の方法。
- DGD要素が、前記脱偏光多重信号中の隣接する光ソース信号の時間平均偏光状態(SOP)間の角度が、nが3以上の整数である時360/n度であるようになっている、請求項12〜17の何れかに記載の方法。
- nが4に等しい、請求項18に記載の方法。
- mがゼロに等しい、請求項19に記載の方法。
- 前記DGD要素が、各光信号の偏光状態が1つ以上の残りの光信号の偏光状態と直交するように、1つ以上の光信号の偏光状態を修正する、請求項12〜20の何れかに記載の方法。
- 前記ソース信号が、異なる周波数のローディングチャネルの複数の群を備え、各群間の周波数差が各群内の周波数差より大きく、前記多重信号を前記DGD要素に通過させる前記ステップが各群に異なる遅延を導入して前記多重信号を偏光解消する、請求項12〜21の何れかに記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0605673A GB2436408A (en) | 2006-03-21 | 2006-03-21 | Depolarising a WDM signal by passing it through a differential group delay element |
GB0605673.3 | 2006-03-21 | ||
PCT/GB2007/000917 WO2007107705A1 (en) | 2006-03-21 | 2007-03-15 | A depolarised wdm source |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009530943A JP2009530943A (ja) | 2009-08-27 |
JP4746126B2 true JP4746126B2 (ja) | 2011-08-10 |
Family
ID=36383901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009500911A Expired - Fee Related JP4746126B2 (ja) | 2006-03-21 | 2007-03-15 | 偏光解消されたwdmソース |
Country Status (6)
Country | Link |
---|---|
US (1) | US8380064B2 (ja) |
EP (1) | EP2002574B1 (ja) |
JP (1) | JP4746126B2 (ja) |
CN (1) | CN101449493A (ja) |
GB (2) | GB2436408A (ja) |
WO (1) | WO2007107705A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2260591A4 (en) * | 2008-02-22 | 2013-10-23 | Vello Systems Inc | SPECTRALLY EFFICIENT PARALLEL OPTICAL WDM CHANNELS FOR METROPOLITAN AND LONG DISTANCE METROPOLITAN OPTICAL NETWORKS |
JP5304378B2 (ja) * | 2009-03-26 | 2013-10-02 | 富士通株式会社 | 光増幅器 |
US9319169B2 (en) * | 2010-07-07 | 2016-04-19 | Tyco Electronics Subsea Communications Llc | Orthogonally-combining interleaving filter multiplexer and systems and methods using same |
US8731402B2 (en) * | 2010-10-12 | 2014-05-20 | Tyco Electronics Subsea Communications Llc | Orthogonally-combining wavelength selective switch multiplexer and systems and methods using same |
JP5991210B2 (ja) * | 2012-03-29 | 2016-09-14 | 富士通株式会社 | 光信号送信装置 |
JP6236871B2 (ja) * | 2013-05-21 | 2017-11-29 | 富士通株式会社 | 光伝送装置および光伝送方法 |
CN104868969B (zh) * | 2015-04-24 | 2017-10-24 | 西南交通大学 | 一种基于斯托克斯分析的非正交偏振复用信号传输方法 |
US11368216B2 (en) | 2017-05-17 | 2022-06-21 | Alcatel Submarine Networks | Use of band-pass filters in supervisory signal paths of an optical transport system |
EP3599726B1 (en) | 2018-07-25 | 2021-05-19 | Alcatel Submarine Networks | Monitoring equipment for an optical transport system |
EP3696997B1 (en) | 2019-02-15 | 2022-06-15 | Alcatel Submarine Networks | Symmetrical supervisory optical circuit for a bidirectional optical repeater |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09149006A (ja) * | 1995-11-17 | 1997-06-06 | Fujitsu Ltd | 偏波スクランブル式波長多重信号伝送方法及び偏波スクランブル式波長多重信号伝送装置 |
Family Cites Families (11)
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DE3149615A1 (de) * | 1981-12-15 | 1983-07-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Optisches signaluebertragungsverfahren und anordnung zur durchfuehrung des verfahrens |
JP2002031735A (ja) * | 2000-05-12 | 2002-01-31 | Furukawa Electric Co Ltd:The | 波長合波モジュール |
DE10058255A1 (de) * | 2000-11-23 | 2002-05-29 | Sel Alcatel Ag | Verfahren zur Verbesserung der Signalqualität von optischen Signalen, Übertragungssystem sowie Modulator |
US6433921B1 (en) * | 2001-01-12 | 2002-08-13 | Onetta, Inc. | Multiwavelength pumps for raman amplifier systems |
US20020131106A1 (en) * | 2001-03-16 | 2002-09-19 | Peter Snawerdt | Secure wave-division multiplexing telecommunications system and method |
GB0121492D0 (en) * | 2001-09-05 | 2001-10-24 | Cit Alcatel | A multi-channel optical loading channel transmitter |
JP4191035B2 (ja) * | 2001-10-10 | 2008-12-03 | 古河電気工業株式会社 | 非偏光化レーザダイオードモジュール |
JP2003188449A (ja) * | 2001-12-17 | 2003-07-04 | Furukawa Electric Co Ltd:The | デポラライザ付き偏波合成器を用いた励起光の非偏光化方法及び非偏光化装置 |
US7154659B1 (en) * | 2002-04-18 | 2006-12-26 | General Photonics Corporation | Optical depolarizers and DGD generators based on optical delay |
US6870973B2 (en) * | 2002-07-08 | 2005-03-22 | Jds Uniphase Corporation | Fiber depolarizer for fabry-perot laser diodes |
EP1538766B1 (en) * | 2003-12-04 | 2006-04-05 | Alcatel | Transmission controller and method for equalization of channels in a wavelength-division-muliplexing system |
-
2006
- 2006-03-21 GB GB0605673A patent/GB2436408A/en not_active Withdrawn
-
2007
- 2007-03-15 JP JP2009500911A patent/JP4746126B2/ja not_active Expired - Fee Related
- 2007-03-15 GB GB0705028A patent/GB2436693B/en not_active Expired - Fee Related
- 2007-03-15 US US12/293,797 patent/US8380064B2/en not_active Expired - Fee Related
- 2007-03-15 CN CN200780018226.2A patent/CN101449493A/zh active Pending
- 2007-03-15 EP EP07712909A patent/EP2002574B1/en not_active Not-in-force
- 2007-03-15 WO PCT/GB2007/000917 patent/WO2007107705A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09149006A (ja) * | 1995-11-17 | 1997-06-06 | Fujitsu Ltd | 偏波スクランブル式波長多重信号伝送方法及び偏波スクランブル式波長多重信号伝送装置 |
Also Published As
Publication number | Publication date |
---|---|
US20100322627A1 (en) | 2010-12-23 |
GB0705028D0 (en) | 2007-04-25 |
GB0605673D0 (en) | 2006-05-03 |
GB2436693A (en) | 2007-10-03 |
WO2007107705A1 (en) | 2007-09-27 |
EP2002574A1 (en) | 2008-12-17 |
GB2436408A (en) | 2007-09-26 |
EP2002574B1 (en) | 2012-08-08 |
GB2436693B (en) | 2008-04-02 |
CN101449493A (zh) | 2009-06-03 |
JP2009530943A (ja) | 2009-08-27 |
US8380064B2 (en) | 2013-02-19 |
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