HK145196A - Adiabatic reflection apparatus - Google Patents

Adiabatic reflection apparatus

Info

Publication number
HK145196A
HK145196A HK145196A HK145196A HK145196A HK 145196 A HK145196 A HK 145196A HK 145196 A HK145196 A HK 145196A HK 145196 A HK145196 A HK 145196A HK 145196 A HK145196 A HK 145196A
Authority
HK
Hong Kong
Prior art keywords
waveguide
mode
symmetric
branch
coupler
Prior art date
Application number
HK145196A
Other languages
German (de)
English (en)
Inventor
Howard Henry Charles
Shani Yosi
Feogor Kazarinov Rudolf
Original Assignee
At&T Corp.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by At&T Corp. filed Critical At&T Corp.
Publication of HK145196A publication Critical patent/HK145196A/en

Links

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
    • G02B6/28—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
    • G02B6/29304—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 by diffraction, e.g. grating
    • G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
    • G02B6/29317—Light guides of the optical fibre type
    • G02B6/29319—With a cascade of diffractive elements or of diffraction operations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
    • 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
    • G02B6/12—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
    • G02B6/12007—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
    • 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
    • G02B6/12—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
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G02B6/125—Bends, branchings or intersections
    • 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
    • G02B6/29346—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 by wave or beam interference
    • G02B6/2935—Mach-Zehnder configuration, i.e. comprising separate splitting and combining means
    • G02B6/29352—Mach-Zehnder configuration, i.e. comprising separate splitting and combining means in a light guide
    • G02B6/29355—Cascade arrangement of interferometers
    • 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
    • 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
    • H04B10/2519—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using Bragg gratings
    • 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
    • H04B10/2581—Multimode transmission
    • 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
    • G02B6/12—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
    • G02B2006/12083—Constructional arrangements
    • G02B2006/12107—Grating
    • 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
    • G02B6/12—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
    • G02B2006/12133—Functions
    • G02B2006/12159—Interferometer

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optical Integrated Circuits (AREA)
  • Optical Communication System (AREA)

Claims (7)

  1. Dispositif réfléchissant comprenant :
    des première et seconde branches de guides d'ondes monomodes (14.1, 14.2), une section de guide d'ondes multimode commune (13), un premier coupleur en Y (14) couplant les première et seconde branches de guide d'ondes (14.1, 14.2) à une extrémité de la section de guide d'ondes commune (13), au moins deux bras de guide d'ondes monomodes (12.1, 12.2), un second coupleur en Y symétrique (12.3) couplant les bras de guide d'ondes (12.1, 12.2) à l'autre extrémité de la section de guide d'ondes commune (13), un dispositif de réflexion (20.1, 20.2) disposé dans chacun des bras de guide d'ondes (12.1, 12.2), ces dispositifs de réflexion (20.1, 20.2) étant conçus pour réfléchir de la lumière à au moins une longueur d'onde prédéterminée (λr), caractérisé en ce que le premier coupleur en Y (14) est adiabatique, en ce que le premier coupleur en Y (14) et les première et seconde branches de guide d'ondes (14.1, 14.2) sont conçues de façon que le mode guidé de la première branche de guide d'ondes (14.1) soit couplé à un mode symétrique de la section de guide d'ondes commune (13) et que le mode guidé de la seconde branche de guide d'ondes (14.2) soit couplé à un mode antisymétrique de la section de guide d'ondes commune (13), et en ce que les bras de guide d'ondes (12.1, 12.2) et les dispositifs de réflexion (20.1, 20.2) sont conçus de façon qu'un mode symétrique au moins à cette longueur d'onde prédéterminée (λr) dans la section de guide d'ondes commune (13), soit réfléchi vers l'arrière dans la section de guide d'ondes commune (13) en tant que mode antisymétrique, et inversement.
  2. Dispositif selon la revendication 1, dans lequel les première et seconde branches de guide d'ondes monomodes (14.1 et 14.2) et les bras de guide d'ondes (12.1 et 12.2) comprennent des guides d'ondes à couches minces supportés par des substrats.
  3. Dispositif selon la revendication 2, dans lequel la section commune (13) comprend des guides d'ondes monomodes physiquement séparés mais couplés optiquement (13.1 et 13.2) qui sont identiques l'un à l'autre au moins dans la région des dispositifs de réflexion (20.1, 20.2).
  4. Dispositif selon la revendication 3, dans lequel les guides d'ondes (13.1 et 13.2) comprennent de la silice.
  5. Dispositif selon la revendication 1, dans lequel la première branche de guide d'ondes monomode (14.1) est plus large que la seconde branche de guide d'ondes monomode (14.2).
  6. Dispositif selon la revendication 1, dans lequel les longueurs des trajets optiques des bras de guide d'ondes monomodes (12.1, 12.2) diffèrent l'une de l'autre d'environ λ/4.
  7. Dispositif selon l'une quelconque des revendications 1 à 6 destiné à être utilisé en tant que compensateur de dispersion pour modifier la forme d'une impulsion optique ayant des composantes de longueurs d'onde couvrant une gamme prédéterminée, dans lequel les dispositifs de réflexion (20.1, 20.2) sont conçus pour réfléchir de la lumière à plusieurs de ces longueurs d'ondes au nombre d'au moins un, à l'intérieur de cette plage prédéterminée, et
    les bras de guide d'ondes (12.1, 12.2) et les dispositifs de réflexion (20.1, 20.2) sont conçus pour que, après que l'impulsion a pénétré dans la première branche (14.1), une version modifiée de cette impulsion sorte de la seconde branche (14.2).
HK145196A 1990-07-27 1996-08-01 Adiabatic reflection apparatus HK145196A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/559,010 US5048909A (en) 1990-07-27 1990-07-27 Adiabatic reflection apparatus

Publications (1)

Publication Number Publication Date
HK145196A true HK145196A (en) 1996-08-09

Family

ID=24231919

Family Applications (1)

Application Number Title Priority Date Filing Date
HK145196A HK145196A (en) 1990-07-27 1996-08-01 Adiabatic reflection apparatus

Country Status (5)

Country Link
US (1) US5048909A (fr)
EP (1) EP0468715B1 (fr)
JP (1) JPH04242227A (fr)
DE (1) DE69116458T2 (fr)
HK (1) HK145196A (fr)

Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2624328B2 (ja) * 1989-05-19 1997-06-25 日本電気 株式会社 光合波分波器
USRE35516E (en) * 1990-07-27 1997-05-20 Lucent Technologies Inc. Adiabatic reflection Y-coupler apparatus
GB9027657D0 (en) * 1990-12-20 1991-02-13 Secr Defence Optical device
GB2254183B (en) * 1991-03-27 1995-01-18 Marconi Gec Ltd An amplifier/filter combination
JP2871893B2 (ja) * 1991-06-03 1999-03-17 古河電気工業株式会社 フィルタ付き分岐結合器
US5133029A (en) * 1991-06-28 1992-07-21 Bell Communications Research, Inc. Adiabatic polarization splitter
GB9200616D0 (en) * 1992-01-10 1992-03-11 British Telecomm An optical grating and a method of fabricating an optical grating
GB2265059B (en) * 1992-03-04 1995-07-26 Northern Telecom Ltd Optical regenerators
FR2689349B1 (fr) * 1992-03-31 1994-05-06 Alcatel Nv Multiplexeur en longueur d'onde pour systeme optique integre.
US5233453A (en) * 1992-04-29 1993-08-03 International Business Machines Corporation Space-division switched waveguide array filter and method using same
US5224183A (en) * 1992-07-23 1993-06-29 Alcatel Network Systems, Inc. Multiple wavelength division multiplexing signal compensation system and method using same
JPH06120906A (ja) * 1992-10-03 1994-04-28 Canon Inc 光レシーバ、光半導体装置及びそれを用いた光通信方式及び光通信システム
US5416629A (en) * 1992-12-02 1995-05-16 General Instrument Corporation Intensity modulated digital optical communications using a frequency modulated signal laser
JPH06216467A (ja) * 1993-01-19 1994-08-05 Hitachi Ltd 半導体光分散補償器
NL9300204A (nl) * 1993-02-02 1994-09-01 Nederland Ptt Geintegreerde optische component voor het manipuleren van de polarisatie van optische signalen.
US5475780A (en) * 1993-06-17 1995-12-12 At&T Corp. Optical waveguiding component comprising a band-pass filter
FI944253A7 (fi) * 1993-09-17 1995-03-18 Iot Integrierte Optik Gmbh Integroidusti optinen 2 x 2 -kytkin
GB9323226D0 (en) * 1993-11-10 1994-01-05 Northern Telecom Ltd Optical fibre elements
US5430817A (en) * 1994-03-31 1995-07-04 At&T Corp. Optical systems and devices using long period spectral shaping devices
GB9411061D0 (en) * 1994-06-02 1994-07-20 Northern Telecom Ltd Optical waveguide amplifiers
US5500910A (en) * 1994-06-30 1996-03-19 The Whitaker Corporation Passively aligned holographic WDM
US5657406A (en) * 1994-09-23 1997-08-12 United Technologies Corporation Efficient optical wavelength multiplexer/de-multiplexer
FR2725529B1 (fr) * 1994-10-11 1996-11-22 Alcatel Nv Coupleur optique selectif en longueur d'onde
FR2725528B1 (fr) * 1994-10-11 1996-11-22 Alcatel Nv Ligne a retard optique selectif en longueur d'onde
GB2297656A (en) * 1995-02-01 1996-08-07 Northern Telecom Ltd Optical filtering
GB2299683A (en) * 1995-04-04 1996-10-09 Northern Telecom Ltd Optical notch filter manufacture in a single mode fibre
US5583683A (en) * 1995-06-15 1996-12-10 Optical Corporation Of America Optical multiplexing device
GB2302443B (en) * 1995-06-21 1999-03-17 Northern Telecom Ltd Lasers
JP3977430B2 (ja) * 1996-03-29 2007-09-19 ブリティッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニー 色分散補償用ノード
US5917635A (en) * 1996-05-30 1999-06-29 Northern Telecom Limited Optical repeaters for single-and multi-wavelength operation with dispersion equalization
KR100207602B1 (ko) * 1996-12-06 1999-07-15 윤종용 광 전력의 손실을 방지하는 광 파장 필터 및 이를 이용한 광 디멀티플렉서
US5978114A (en) * 1997-08-29 1999-11-02 Amphenol Corporation Modular cascaded Mach-Zehnder DWDM components
US5974206A (en) * 1997-12-19 1999-10-26 Northern Telecom Limited Dispersion compensation with low polarization mode dispersion
CA2331981A1 (fr) * 1998-05-08 1999-11-18 Richard M. Osgood, Jr. Coupleur brouilleur multimode de taille compacte
US6792172B1 (en) * 1998-05-08 2004-09-14 The Trustees Of Columbia University Of The City Of New York Reduced size multimode interference based coupler
JP3492524B2 (ja) * 1998-05-29 2004-02-03 三菱電機株式会社 分散補償装置
US6226091B1 (en) * 1998-09-24 2001-05-01 Thomas & Betts International, Inc. Optical fiber Mach-Zehnder interferometer fabricated with asymmetric couplers
US6185345B1 (en) 1999-03-18 2001-02-06 Qtera Corporation Ultra-stable optical wavelength division multiplexer/demultiplexer
US6341186B1 (en) 1999-04-13 2002-01-22 Qtera Corporation Method and apparatus for the passband flattening of dense wavelength division optical filters
GB9915233D0 (en) 1999-06-30 1999-09-01 Marconi Comm Ltd Optical system
US6400736B1 (en) * 1999-10-05 2002-06-04 Agere Systems Guardian Corp. Wavelength stabilized laser modules
US6388783B1 (en) * 1999-11-30 2002-05-14 Corning Incorporated Narrow band wavelength division multiplexer and method of multiplexing optical signals
US6388785B2 (en) 2000-02-08 2002-05-14 University Of Southern California Optical compensation for dispersion-induced power fading in optical transmission of double-sideband signals
FR2822314B1 (fr) * 2001-03-19 2003-06-27 Highwave Optical Tech Multiplexeur a insertion-extraction
US6636654B2 (en) * 2001-03-30 2003-10-21 Optical Research Associates Programmable optical switching add/drop multiplexer
US7203421B2 (en) * 2001-09-28 2007-04-10 Optical Research Associates Littrow grating based OADM
US6748126B2 (en) 2001-12-31 2004-06-08 3M Innovative Properties Company System for polarization mode dispersion compensation
KR100417002B1 (ko) * 2002-01-14 2004-02-05 삼성전자주식회사 안정화 광도파로를 구비한 광세기 분할기
EP1329749A1 (fr) * 2002-01-16 2003-07-23 Alcatel Coupleur optique intégré avec guides d'onde à parois coniques
US20030133663A1 (en) * 2002-01-16 2003-07-17 Jds Uniphase Corporation Integrated optical splitter
US6795472B2 (en) * 2002-02-05 2004-09-21 Lucent Technologies Inc. Laser with a resonant optical reflector
US7218814B2 (en) * 2002-05-28 2007-05-15 Optun (Bvi) Ltd. Method and apparatus for optical mode conversion
US7058251B2 (en) * 2002-06-12 2006-06-06 Optical Research Associates Wavelength selective optical switch
JP3985159B2 (ja) * 2003-03-14 2007-10-03 日本電気株式会社 利得クランプ型半導体光増幅器
JP2009128371A (ja) * 2007-11-19 2009-06-11 Fujikura Ltd マルチモード光カプラ
WO2013036955A1 (fr) 2011-09-08 2013-03-14 Skorpios Technologies, Inc. Réflecteurs accordables basés sur des interférences multi-cavités
JP2013205456A (ja) * 2012-03-27 2013-10-07 Oki Electric Ind Co Ltd 波長選択性経路切換素子
JP6300437B2 (ja) * 2012-09-26 2018-03-28 沖電気工業株式会社 光導波路素子
CN113126207B (zh) * 2019-12-30 2025-09-12 华为技术有限公司 光纤信号模式转换装置、转换方法及光纤传输系统
US11016253B1 (en) * 2020-06-08 2021-05-25 Honeywell International Inc. Adiabatic waveguide couplers with ultra-low back-reflection
CN113188600A (zh) * 2021-04-30 2021-07-30 西安航天动力研究所 远距离分布式输油管多参数在线测量系统

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128301A (en) * 1975-12-04 1978-12-05 The United States Of America As Represented By The Secretary Of The Navy Optical waveguide power divider
US4142775A (en) * 1976-09-27 1979-03-06 Bell Telephone Laboratories, Incorporated Optical signal processing devices
JPS60121404A (ja) * 1983-12-05 1985-06-28 Nippon Telegr & Teleph Corp <Ntt> 光分波器
DE3406207A1 (de) * 1984-02-21 1985-08-29 Philips Patentverwaltung Gmbh, 2000 Hamburg Integriert-optische wellenlaengenmultiplex- und -demultiplexeinrichtung fuer monomode-uebertragungssysteme und ihre verwendung
US4763977A (en) * 1985-01-09 1988-08-16 Canadian Patents And Development Limited-Societe Optical fiber coupler with tunable coupling ratio and method of making
JPS63231403A (ja) * 1987-03-11 1988-09-27 アメリカン　テレフォン　アンド　テレグラフ　カムパニー 光導波路を有する光学装置
US4775207A (en) * 1987-03-17 1988-10-04 Bell Communications Research, Inc. Electro-optical switch
US4900119A (en) * 1988-04-01 1990-02-13 Canadian Patents & Development Ltd. Wavelength selective optical devices using optical directional coupler
GB2224583B (en) * 1988-10-28 1992-01-08 Plessey Co Plc Guided-wave optical wavelength duplexer

Also Published As

Publication number Publication date
DE69116458T2 (de) 1996-08-08
JPH04242227A (ja) 1992-08-28
EP0468715A3 (en) 1992-08-19
US5048909A (en) 1991-09-17
EP0468715A2 (fr) 1992-01-29
DE69116458D1 (de) 1996-02-29
EP0468715B1 (fr) 1996-01-17

Similar Documents

Publication Publication Date Title
EP0468715B1 (fr) Dispositif à réflexion adiabatique
US5093876A (en) WDM systems incorporating adiabatic reflection filters
US5473719A (en) Optical dispersion compensator
US5875272A (en) Wavelength selective optical devices
US4900119A (en) Wavelength selective optical devices using optical directional coupler
US5703975A (en) Interferometric switch
US5050954A (en) Multiport optical devices
US5717798A (en) Optical waveguide system comprising a mode coupling grating and a mode discrimination coupler
US5889899A (en) Article comprising a Bragg reflective Mach-Zehnder filter of reduced coupled dependence
US5974206A (en) Dispersion compensation with low polarization mode dispersion
US6269205B1 (en) Optical devices based on energy transfer between different modes in optical waveguide
USRE35516E (en) Adiabatic reflection Y-coupler apparatus
US7162120B2 (en) Tunable dispersion compensator and method for tunable dispersion compensation
US6640024B1 (en) Add-drop wavelength filter using mode discrimination couplers and tilted bragg gratings
EP0857314A1 (fr) Dispositifs optiques selectifs en longueurs d&#39;ondes
US6633704B2 (en) Chromatic dispersion compensator
US20020094164A1 (en) Chirped Bragg grating reflectors and adjustable dispersion apparatus incorporating such gratings
US6351586B1 (en) Wavelength dependent phase delay device
Keiser Wavelength division multiplexing (WDM)
US6731836B2 (en) Dispersion compensator
Madsen et al. Integrated optical allpass filters for dispersion compensation
US20030231824A1 (en) Tunable dispersion compensators
Mohammed et al. Simulation and Evaluation of (OADM) based on Bragg Grating and 3 db MMI Couplers
CA2314997A1 (fr) Filtres d&#39;interferometres mach-zehnder a fibres optiques et insensibles a la temperature

Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)