DE3175997D1 - Optical communication transmission system - Google Patents
Optical communication transmission systemInfo
- Publication number
- DE3175997D1 DE3175997D1 DE8181630027T DE3175997T DE3175997D1 DE 3175997 D1 DE3175997 D1 DE 3175997D1 DE 8181630027 T DE8181630027 T DE 8181630027T DE 3175997 T DE3175997 T DE 3175997T DE 3175997 D1 DE3175997 D1 DE 3175997D1
- Authority
- DE
- Germany
- Prior art keywords
- transmission system
- optical communication
- communication transmission
- optical
- transmission
- 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.)
- Expired
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
- G02B6/29331—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 evanescent wave coupling
- G02B6/29332—Wavelength selective couplers, i.e. based on evanescent coupling between light guides, e.g. fused fibre couplers with transverse coupling between fibres having different propagation constant wavelength dependency
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/002—Optical devices or arrangements for the control of light using movable or deformable optical elements the movement or the deformation controlling the frequency of light, e.g. by Doppler effect
-
- 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
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2821—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
- G02B6/2835—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals formed or shaped by thermal treatment, e.g. couplers
-
- 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
- G02B6/29344—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 modal interference or beating, i.e. of transverse modes, e.g. zero-gap directional coupler, MMI
-
- 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
- G02B6/2938—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 for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
-
- 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
-
- 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
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3834—Means for centering or aligning the light guide within the ferrule
- G02B6/3843—Means for centering or aligning the light guide within the ferrule with auxiliary facilities for movably aligning or adjusting the fibre within its ferrule, e.g. measuring position or eccentricity
-
- 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
- G02F1/01—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
- G02F1/0128—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 electro-mechanical, magneto-mechanical, elasto-optic effects
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
- H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
- H01S5/0622—Controlling the frequency of the radiation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/50—Amplifier structures not provided for in groups H01S5/02 - H01S5/30
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06729—Peculiar transverse fibre profile
- H01S3/06737—Fibre having multiple non-coaxial cores, e.g. multiple active cores or separate cores for pump and gain
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
- H01S3/094007—Cladding pumping, i.e. pump light propagating in a clad surrounding the active core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
- H01S3/094019—Side pumped fibre, whereby pump light is coupled laterally into the fibre via an optical component like a prism, or a grating, or via V-groove coupling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094076—Pulsed or modulated pumping
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/135,798 US4342499A (en) | 1979-03-19 | 1980-03-31 | Communications tuning construction |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3175997D1 true DE3175997D1 (en) | 1987-04-16 |
Family
ID=22469721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8181630027T Expired DE3175997D1 (en) | 1980-03-31 | 1981-03-31 | Optical communication transmission system |
Country Status (6)
Country | Link |
---|---|
US (1) | US4342499A (de) |
EP (1) | EP0037793B1 (de) |
JP (1) | JPS56168605A (de) |
CA (1) | CA1171147A (de) |
DE (1) | DE3175997D1 (de) |
IN (1) | IN155055B (de) |
Families Citing this family (75)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3010971A1 (de) * | 1980-03-21 | 1981-10-08 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur herstellung eines optischen 4-tor-kopplers |
US4616898A (en) * | 1980-03-31 | 1986-10-14 | Polaroid Corporation | Optical communication systems using raman repeaters and components therefor |
JPS5759292A (en) * | 1980-09-29 | 1982-04-09 | Canon Inc | Character processor |
US4483583A (en) * | 1981-03-07 | 1984-11-20 | Licentia Patent-Verwaltungs-Gmbh | Selective directional coupler for guided waves |
US4758087A (en) * | 1981-03-09 | 1988-07-19 | Polaroid Corporation | Fiber optic transducer |
US4473270A (en) * | 1981-10-23 | 1984-09-25 | Leland Stanford Junior University | Splice-free fiber optic recirculating memory |
US4557553A (en) * | 1981-11-02 | 1985-12-10 | The United States Of America As Represented By The Secretary Of The Navy | Method of wavelength multiplexing in fused single-mode fiber couplers |
US4556279A (en) * | 1981-11-09 | 1985-12-03 | Board Of Trustees Of The Leland Stanford Junior University | Passive fiber optic multiplexer |
US4511207A (en) * | 1981-11-19 | 1985-04-16 | The Board Of Trustees Of The Leland Stanford Junior University | Fiber optic data distributor |
US4557552A (en) * | 1981-11-19 | 1985-12-10 | Board Of Trustees Of The Leland Stanford Junior University | Microbend optical fiber tapped delay line |
US4558920A (en) * | 1981-11-19 | 1985-12-17 | Board Of Trustees Of The Leland Stanford Junior University | Tapped optical fiber delay line |
US4720160A (en) * | 1981-12-16 | 1988-01-19 | Polaroid Corporation | Optical resonant cavity filters |
JPH0766093B2 (ja) * | 1981-12-16 | 1995-07-19 | ポラロイド コーポレーション | 光エネルギ伝達装置 |
US4588255A (en) * | 1982-06-21 | 1986-05-13 | The Board Of Trustees Of The Leland Stanford Junior University | Optical guided wave signal processor for matrix-vector multiplication and filtering |
US4515431A (en) * | 1982-08-11 | 1985-05-07 | The Board Of Trustees Of The Leland Stanford Junior University | Fiber optic amplifier |
US4469397A (en) * | 1982-09-29 | 1984-09-04 | Board Of Trustees Of The Leland Stanford Junior University | Fiber optic resonator |
US4530603A (en) * | 1982-09-29 | 1985-07-23 | The Board Of Trustees Of Leland Stanford Jr. Univ. | Stabilized fiber optic sensor |
BR8208105A (pt) * | 1982-11-12 | 1984-10-02 | Univ Leland Stanford Junior | Linha de retardo otico de fibra continuamente variavel |
US4632513A (en) * | 1983-05-26 | 1986-12-30 | Gould Inc. | Method of making a polarization-insensitive, evanescent-wave, fused coupler with minimal environmental sensitivity |
USRE33296E (en) * | 1983-05-26 | 1990-08-14 | Gould Inc. | Method of making a polarization-insensitive, evanescent-wave, fused coupler with minimal environmental sensitivity |
JPH081503B2 (ja) * | 1983-07-08 | 1996-01-10 | エイ・ティ・アンド・ティ・コーポレーション | 波長分割多重光学通信システム |
US4560234A (en) * | 1983-08-15 | 1985-12-24 | Board Of Trustees Of The Leland Stanford Junior University | Fiber optic switchable coupler |
US4652079A (en) * | 1983-08-26 | 1987-03-24 | The Board Of Trustees Of The Leland Stanford Junior University | High speed pulse train generator |
US4554510A (en) * | 1983-09-12 | 1985-11-19 | The Board Of Trustees Of Leland Stanford Junior University | Switching fiber optic amplifier |
US4674830A (en) * | 1983-11-25 | 1987-06-23 | The Board Of Trustees Of The Leland Stanford Junior University | Fiber optic amplifier |
US4723824A (en) * | 1983-11-25 | 1988-02-09 | The Board Of Trustees Of The Leland Stanford Junior University | Fiber optic amplifier |
EP0143645A1 (de) * | 1983-11-28 | 1985-06-05 | BRITISH TELECOMMUNICATIONS public limited company | Optische Filter |
GB2152694B (en) * | 1984-01-05 | 1987-06-24 | Standard Telephones Cables Ltd | Wavelength selective optical waveguide coupler |
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US4759596A (en) * | 1984-08-30 | 1988-07-26 | Polaroid Corporation | Wavelength selective optical cavity including holographic filter layers |
EP0189196A3 (de) * | 1985-01-25 | 1987-10-14 | Polaroid Corporation | Ramanverstärktes Filterabzweigungssystem |
US4673270A (en) * | 1985-06-28 | 1987-06-16 | Amp Incorporated | Channel add/drop filter-coupler |
US4717230A (en) * | 1985-06-28 | 1988-01-05 | Amp Incorporated | Optical eraser and node switch for an optical network |
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US4681397A (en) * | 1985-06-28 | 1987-07-21 | Amp Incorporated | Optical switching arrangement |
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US4778238A (en) * | 1985-08-01 | 1988-10-18 | Hicks John W | Optical communications systems and process for signal amplification using stimulated brillouin scattering (SBS) and laser utilized in the system |
US4730886A (en) * | 1985-08-06 | 1988-03-15 | Hicks John W | Fiber laser sensor |
FR2588971B1 (fr) * | 1985-10-21 | 1988-10-14 | Electricite De France | Procede et dispositif de transmission de signaux par couplage lateral avec une fibre optique |
US4834481A (en) * | 1985-11-12 | 1989-05-30 | Gould Inc. | In-line single-mode fiber optic multiplexer/demultiplexer |
CA1273515A (en) * | 1985-12-30 | 1990-09-04 | Colin Anderson Millar | Optical coupling |
US4768849A (en) * | 1986-09-15 | 1988-09-06 | Hicks Jr John W | Filter tap for optical communications systems |
US4798438A (en) * | 1986-10-15 | 1989-01-17 | Gould Inc. | Method of making a single-mode evanescent-wave coupler having reduced wavelength dependence |
US4901306A (en) * | 1987-02-24 | 1990-02-13 | American Telephone And Telegraph Company, At&T Bell Laboratories | Wavelength-division multiplexed optical fiber network |
US4822126A (en) * | 1987-05-21 | 1989-04-18 | Amphenol Corporation | Wavelength independent coupler and method of manufacture thereof |
WO1988009943A1 (en) * | 1987-06-05 | 1988-12-15 | The Commonwealth Of Australia | Asymmetric fibre optic couplers and their fabrication |
JPS63309906A (ja) * | 1987-06-10 | 1988-12-19 | Seiko Instr & Electronics Ltd | 光導波結合器 |
US4818051A (en) * | 1987-08-10 | 1989-04-04 | Us West Advanced Technologies, Inc. | Optical bus |
JP2764263B2 (ja) * | 1987-09-16 | 1998-06-11 | セイコーインスツルメンツ株式会社 | 波長フィルタ |
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US4867518A (en) * | 1988-08-31 | 1989-09-19 | The United States Of America As Represented By The Secretary Of The Navy | All-fiber SFPM amplifier |
US4913507A (en) * | 1988-09-08 | 1990-04-03 | The United States Of America As Represented By The Secretary Of The Navy | Mode field conditioner |
US5039189A (en) * | 1990-04-06 | 1991-08-13 | Lockheed Missiles & Space Company, Inc. | Optical signal distribution network and method of converting independent optical/electrical signals |
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US5339157A (en) * | 1993-02-19 | 1994-08-16 | At&T Bell Laboratories | Rapidly tunable integrated optical filter |
US5408554A (en) * | 1993-12-17 | 1995-04-18 | Porta System Corporation | Fiber optic coupling |
US5479542A (en) * | 1994-06-09 | 1995-12-26 | Ceramoptec Industries Inc. | All-fiber in line optical isolator |
FR2724735B1 (fr) * | 1994-09-21 | 1996-12-06 | Grosso Philippe | Coupleur optique selectif en longueur d'onde, a fibre optique multicoeurs |
FR2727769B1 (fr) * | 1994-12-02 | 1997-01-10 | Alcatel Cable | Procede de couplage entre une fibre optique multicoeurs et plusieurs fibres optiques monocoeurs |
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DE19827139C2 (de) * | 1998-06-18 | 2002-01-31 | Zeiss Carl Jena Gmbh | Mikroskop mit einem über eine Lichtleitfaser eingekoppelten Kurzpulslaser |
US6115174A (en) * | 1998-07-21 | 2000-09-05 | Corvis Corporation | Optical signal varying devices |
US6839522B2 (en) | 1998-07-21 | 2005-01-04 | Corvis Corporation | Optical signal varying devices, systems and methods |
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US6587261B1 (en) * | 1999-05-24 | 2003-07-01 | Corvis Corporation | Optical transmission systems including optical amplifiers and methods of use therein |
FR2800218B1 (fr) * | 1999-10-22 | 2002-01-11 | Algety Telecom | Systeme de transmission par fibre optique utilisant des impulsions rz |
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JPS53137160A (en) * | 1977-05-06 | 1978-11-30 | Nippon Telegr & Teleph Corp <Ntt> | Optical filter of directivity coupler type |
US4153329A (en) * | 1977-07-25 | 1979-05-08 | Bell Telephone Laboratories, Incorporated | Optical crosspoint switch having mode-conversion facilities |
JPS54110858A (en) * | 1978-02-20 | 1979-08-30 | Nippon Telegr & Teleph Corp <Ntt> | Optical guide type wavelength filter |
US4151747A (en) * | 1978-06-21 | 1979-05-01 | Electric Power Research Institute, Inc. | Monitoring arrangement utilizing fiber optics |
JPS6051086B2 (ja) * | 1978-11-30 | 1985-11-12 | 日本電信電話株式会社 | シングルモ−ド光フアイバ周期分波器 |
US4237550A (en) * | 1979-06-08 | 1980-12-02 | International Telephone And Telegraph Corporation | Multiuser protected optical data bus distribution systems |
US4300816A (en) * | 1979-08-30 | 1981-11-17 | United Technologies Corporation | Wide band multicore optical fiber |
JPS56128904A (en) * | 1980-03-14 | 1981-10-08 | Nippon Telegr & Teleph Corp <Ntt> | Optical branching filter |
-
1980
- 1980-03-31 US US06/135,798 patent/US4342499A/en not_active Expired - Lifetime
-
1981
- 1981-03-30 CA CA000374218A patent/CA1171147A/en not_active Expired
- 1981-03-31 DE DE8181630027T patent/DE3175997D1/de not_active Expired
- 1981-03-31 JP JP4835881A patent/JPS56168605A/ja active Pending
- 1981-03-31 EP EP81630027A patent/EP0037793B1/de not_active Expired
- 1981-04-04 IN IN375/CAL/81A patent/IN155055B/en unknown
Also Published As
Publication number | Publication date |
---|---|
US4342499A (en) | 1982-08-03 |
EP0037793A2 (de) | 1981-10-14 |
EP0037793A3 (en) | 1982-03-24 |
IN155055B (de) | 1984-12-29 |
JPS56168605A (en) | 1981-12-24 |
EP0037793B1 (de) | 1987-03-11 |
CA1171147A (en) | 1984-07-17 |
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