FR2695212B1 - Dispositif a filtre optique. - Google Patents
Dispositif a filtre optique.Info
- Publication number
- FR2695212B1 FR2695212B1 FR9310234A FR9310234A FR2695212B1 FR 2695212 B1 FR2695212 B1 FR 2695212B1 FR 9310234 A FR9310234 A FR 9310234A FR 9310234 A FR9310234 A FR 9310234A FR 2695212 B1 FR2695212 B1 FR 2695212B1
- Authority
- FR
- France
- Prior art keywords
- optical filter
- filter device
- optical
- filter
- 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 - Lifetime
Links
Classifications
-
- 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
- G02F1/015—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 with at least one potential jump barrier, e.g. PN, PIN junction
- G02F1/025—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 with at least one potential jump barrier, e.g. PN, PIN junction in an optical waveguide structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
-
- 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
- G02B6/124—Geodesic lenses or integrated gratings
-
- 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
- G02F1/011—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 in optical waveguides, not otherwise provided for in this subclass
-
- 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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
- G02F1/31—Digital deflection, i.e. optical switching
- G02F1/313—Digital deflection, i.e. optical switching in an optical waveguide structure
- G02F1/3132—Digital deflection, i.e. optical switching in an optical waveguide structure of directional coupler type
-
- 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
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/1028—Coupling to elements in the cavity, e.g. coupling to waveguides adjacent the active region, e.g. forward coupled [DFC] structures
-
- 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
- H01S5/5045—Amplifier structures not provided for in groups H01S5/02 - H01S5/30 the arrangement having a frequency filtering function
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
- G02F2201/307—Reflective grating, i.e. Bragg grating
-
- 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
- G02F2203/00—Function characteristic
- G02F2203/05—Function characteristic wavelength dependent
- G02F2203/055—Function characteristic wavelength dependent wavelength filtering
-
- 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
- H01S5/02—Structural details or components not essential to laser action
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
-
- 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
- H01S5/0625—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in multi-section lasers
- H01S5/06255—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
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/1028—Coupling to elements in the cavity, e.g. coupling to waveguides adjacent the active region, e.g. forward coupled [DFC] structures
- H01S5/1032—Coupling to elements comprising an optical axis that is not aligned with the optical axis of the active region
- H01S5/1035—Forward coupled structures [DFC]
-
- 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
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
- H01S5/1206—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers having a non constant or multiplicity of periods
- H01S5/1215—Multiplicity of periods
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9202446A SE470454B (sv) | 1992-08-26 | 1992-08-26 | Optisk filteranordning |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2695212A1 FR2695212A1 (fr) | 1994-03-04 |
FR2695212B1 true FR2695212B1 (fr) | 1995-07-13 |
Family
ID=20387011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9310234A Expired - Lifetime FR2695212B1 (fr) | 1992-08-26 | 1993-08-25 | Dispositif a filtre optique. |
Country Status (6)
Country | Link |
---|---|
US (1) | US5416866A (fr) |
JP (1) | JPH06194613A (fr) |
DE (1) | DE4328777B4 (fr) |
FR (1) | FR2695212B1 (fr) |
GB (1) | GB2270174B (fr) |
SE (1) | SE470454B (fr) |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1006207A3 (nl) * | 1992-09-24 | 1994-06-07 | Imec Inter Uni Micro Electr | Geintegreerd afstembaar optisch filter. |
US5621828A (en) * | 1992-09-24 | 1997-04-15 | Interuniversitair Micro-Elektronica Centrum Vzw | Integrated tunable optical filter |
GB2286057A (en) * | 1994-01-21 | 1995-08-02 | Sharp Kk | Electrically controllable grating |
FR2716303B1 (fr) * | 1994-02-11 | 1996-04-05 | Franck Delorme | Laser à réflecteurs de Bragg distribués, accordable en longueur d'onde, à réseaux de diffraction virtuels activés sélectivement. |
DE4432410B4 (de) * | 1994-08-31 | 2007-06-21 | ADC Telecommunications, Inc., Eden Prairie | Optoelektronisches Multi-Wellenlängen-Bauelement |
US5581642A (en) * | 1994-09-09 | 1996-12-03 | Deacon Research | Optical frequency channel selection filter with electronically-controlled grating structures |
US5491762A (en) * | 1994-09-09 | 1996-02-13 | Deacon Research | ATM switch with electrically-controlled waveguide-routing |
FR2725527B1 (fr) * | 1994-10-10 | 1996-12-20 | Talneau Anne | Filtre optique pour plusieurs longueurs d'ondes guidees |
GB9423105D0 (en) * | 1994-11-16 | 1995-01-04 | Northern Telecom Ltd | Optical wave grating filter |
US20050225861A1 (en) * | 1995-03-13 | 2005-10-13 | Thomas Mossberg | Segmented complex diffraction gratings |
JPH11511568A (ja) | 1995-08-29 | 1999-10-05 | アロヨ・オプティクス・インコーポレイテッド | 波長選択回折格子利用型光学カプラ |
US6236782B1 (en) | 1995-08-29 | 2001-05-22 | Arroyo Optics, Inc. | Grating assisted coupler devices |
US5875272A (en) * | 1995-10-27 | 1999-02-23 | Arroyo Optics, Inc. | Wavelength selective optical devices |
EP0857314A4 (fr) * | 1995-10-27 | 1999-03-24 | Arroyo Optics Inc | Dispositifs optiques selectifs en longueurs d'ondes |
JP3654383B2 (ja) * | 1995-12-07 | 2005-06-02 | Kddi株式会社 | 光アド/ドロップ多重素子 |
US6169830B1 (en) | 1996-08-26 | 2001-01-02 | Arroyo Optics, Inc. | Methods of fabricating grating assisted coupler devices |
US6078597A (en) * | 1996-11-19 | 2000-06-20 | At & T Corp. | Method and apparatus for optical signal processing by photo-induced loss and/or gain gratings |
US5926493A (en) * | 1997-05-20 | 1999-07-20 | Sdl, Inc. | Optical semiconductor device with diffraction grating structure |
US6011881A (en) * | 1997-12-29 | 2000-01-04 | Ifos, Intelligent Fiber Optic Systems | Fiber-optic tunable filter |
US6088495A (en) * | 1998-04-21 | 2000-07-11 | Technion Research & Development Foundation Ltd. | Intermediate-state-assisted optical coupler |
SE520951C2 (sv) * | 1998-06-17 | 2003-09-16 | Ericsson Telefon Ab L M | Multivåglängdsselektiv switch för switchning och omdirigering av optiska våglängder |
US6208773B1 (en) * | 1999-02-18 | 2001-03-27 | Trw Inc. | Addressable, semiconductor adaptable Bragg gratings (ASABG) |
JP2001215542A (ja) * | 2000-02-04 | 2001-08-10 | Kddi Corp | 非線形光素子 |
US7058245B2 (en) * | 2000-04-04 | 2006-06-06 | Waveguide Solutions, Inc. | Integrated optical circuits |
GB2362720A (en) * | 2000-05-25 | 2001-11-28 | Roke Manor Research | Improvements in or relating to optical switching |
US6549708B2 (en) | 2000-08-21 | 2003-04-15 | Lockheed Martin Corporation | Dual-side waveguide-based wavelength demultiplexer |
SE518476C2 (sv) | 2001-02-22 | 2002-10-15 | Altitun Ab | Metod för att förbättra selektiviteten i ett avstämbart vågledarfilter |
SE0100611L (sv) * | 2001-02-22 | 2002-08-23 | Altitun Ab | Förfarande för att förlustkompensera ett avstämbart filter för en laser, jämte ett dylikt filter |
WO2002093203A2 (fr) * | 2001-05-17 | 2002-11-21 | Optronx, Inc | Circuits optiques/electroniques integres et procedes associes permettant leur generation simultanee |
US6580740B2 (en) * | 2001-07-18 | 2003-06-17 | The Furukawa Electric Co., Ltd. | Semiconductor laser device having selective absorption qualities |
US7653093B2 (en) * | 2001-09-10 | 2010-01-26 | Imec | Widely tunable twin guide laser structure |
US7092419B2 (en) * | 2001-09-10 | 2006-08-15 | San Jose Systems, Inc. | Wavelength agile laser |
US20030064537A1 (en) * | 2001-09-28 | 2003-04-03 | The Furukawa Electric Co., Ltd. | Semiconductor laser device and method for effectively reducing facet reflectivity |
US7189497B2 (en) * | 2002-07-24 | 2007-03-13 | Intel Corporation | Method for writing a planar waveguide having gratings of different center wavelengths |
CN101076749B (zh) | 2004-11-15 | 2011-05-04 | 日立化成工业株式会社 | 光反射器、光合分波器以及光系统 |
WO2007013128A1 (fr) * | 2005-07-25 | 2007-02-01 | Fujitsu Limited | Module à puce semi-conductrice |
EP2403079B1 (fr) | 2010-06-30 | 2014-01-15 | Alcatel Lucent | Amplificateur optique semi-conducteur réfléchissant pour réseaux optiques |
EP2437087A1 (fr) * | 2010-09-29 | 2012-04-04 | Alcatel Lucent | Filtre optique réglable, dispositif optique intégrant ledit filtre et procédé pour filtrer un signal optique |
KR20190082303A (ko) * | 2016-11-18 | 2019-07-09 | 매직 립, 인코포레이티드 | 교차 격자를 이용한 도파관 광 멀티플렉서 |
CN109564362B (zh) * | 2016-11-23 | 2023-12-12 | 洛克利光子有限公司 | 光电装置 |
KR20230053724A (ko) | 2017-01-23 | 2023-04-21 | 매직 립, 인코포레이티드 | 가상, 증강, 또는 혼합 현실 시스템들을 위한 접안렌즈 |
CN111683584A (zh) | 2017-12-15 | 2020-09-18 | 奇跃公司 | 用于增强现实显示系统的目镜 |
WO2020106824A1 (fr) | 2018-11-20 | 2020-05-28 | Magic Leap, Inc. | Oculaires destinés à un système d'affichage à réalité augmentée |
CN114286962A (zh) * | 2019-06-20 | 2022-04-05 | 奇跃公司 | 用于增强现实显示系统的目镜 |
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US3814498A (en) * | 1972-05-04 | 1974-06-04 | Bell Telephone Labor Inc | Integrated optical circuit devices employing optical gratings |
DE2442723A1 (de) * | 1974-09-06 | 1976-03-18 | Siemens Ag | Steuerbarer elektrooptischer gitterkoppler |
US4775980A (en) * | 1983-12-14 | 1988-10-04 | Hitachi, Ltd. | Distributed-feedback semiconductor laser device |
JPS60260024A (ja) * | 1984-06-07 | 1985-12-23 | Kokusai Denshin Denwa Co Ltd <Kdd> | 光変調素子 |
US4794346A (en) * | 1984-11-21 | 1988-12-27 | Bell Communications Research, Inc. | Broadband semiconductor optical amplifier structure |
GB8502013D0 (en) * | 1985-01-26 | 1985-02-27 | Plessey Co Plc | Integrated optical device |
US4750801A (en) * | 1985-09-30 | 1988-06-14 | American Telephone And Telegraph Company, At&T Bell Laboratories | Optical waveguide resonator filters |
US4730327A (en) * | 1985-12-16 | 1988-03-08 | Lytel Incorporated | Dual channel fabry-perot laser |
JPS62241387A (ja) * | 1986-04-11 | 1987-10-22 | Nippon Telegr & Teleph Corp <Ntt> | 半導体光周波数フイルタ |
JP2659187B2 (ja) * | 1987-04-14 | 1997-09-30 | 日本電気株式会社 | 光フィルタ素子 |
JP2749038B2 (ja) * | 1987-07-31 | 1998-05-13 | 株式会社日立製作所 | 波長可変半導体レーザ |
GB2209408B (en) * | 1987-09-04 | 1991-08-21 | Plessey Co Plc | Optical waveguide device having surface relief diffraction grating |
JP2825508B2 (ja) * | 1987-10-09 | 1998-11-18 | 株式会社日立製作所 | 半導体レーザ装置および光通信システム |
JP2659199B2 (ja) * | 1987-11-11 | 1997-09-30 | 日本電気株式会社 | 可変波長フィルタ |
JPH01186918A (ja) * | 1988-01-20 | 1989-07-26 | Nec Corp | 光分波器 |
EP0391334B1 (fr) * | 1989-04-04 | 1994-08-31 | Canon Kabushiki Kaisha | Laser à semi-conducteur avec la possibilité de changer la longueur d'onde d'émission et fittre de sélection de longueur d onde, et méthodes de commande |
DE3915625A1 (de) * | 1989-05-12 | 1990-11-15 | Standard Elektrik Lorenz Ag | Halbleiterlaser |
JPH0357288A (ja) * | 1989-07-17 | 1991-03-12 | Siemens Ag | 半導体レーザーを有するデバイスおよびその使用方法 |
US5022730A (en) * | 1989-12-12 | 1991-06-11 | At&T Bell Laboratories | Wavelength tunable optical filter |
US5016967A (en) * | 1989-12-26 | 1991-05-21 | United Technologies Corporation | Multi-core optical waveguide Bragg grating light redirecting arrangement |
US5007705A (en) * | 1989-12-26 | 1991-04-16 | United Technologies Corporation | Variable optical fiber Bragg filter arrangement |
US5011264A (en) * | 1989-12-28 | 1991-04-30 | General Dynamics Corp., Electronics Divn. | Wide linear dynamic range optical modulator |
JP2914741B2 (ja) * | 1990-10-03 | 1999-07-05 | 株式会社東芝 | 分布帰還型半導体レーザ |
DE69220585T2 (de) * | 1991-01-22 | 1998-02-05 | Canon Kk | Lichtdetektor-Vorrichtungen für mehrere Wellenlängen mit reihenweise angeordneten Gitter-Richtkopplern |
US5233187A (en) * | 1991-01-22 | 1993-08-03 | Canon Kabushiki Kaisha | Multi-wavelength light detecting and/or emitting apparatuses having serially arranged grating directional couplers |
US5367588A (en) * | 1992-10-29 | 1994-11-22 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Communications | Method of fabricating Bragg gratings using a silica glass phase grating mask and mask used by same |
JPH05205486A (ja) * | 1991-04-26 | 1993-08-13 | Naohiro Tanno | 光導波路記録媒体及び光再生装置 |
US5363226A (en) * | 1992-04-06 | 1994-11-08 | Eastman Kodak Company | Apparatus and method for dispersion compensation for a grating coupler using a surface relief reflection grating |
CA2101411C (fr) * | 1992-08-14 | 2003-06-10 | Jean-Pierre Weber | Fibre optique accordable |
US5339157A (en) * | 1993-02-19 | 1994-08-16 | At&T Bell Laboratories | Rapidly tunable integrated optical filter |
US5351324A (en) * | 1993-09-10 | 1994-09-27 | The Regents Of The University Of California, Office Of Technology Transfer | Fiber optic security seal including plural Bragg gratings |
-
1992
- 1992-08-26 SE SE9202446A patent/SE470454B/sv not_active IP Right Cessation
-
1993
- 1993-08-19 GB GB9317245A patent/GB2270174B/en not_active Expired - Lifetime
- 1993-08-25 FR FR9310234A patent/FR2695212B1/fr not_active Expired - Lifetime
- 1993-08-25 US US08/111,573 patent/US5416866A/en not_active Expired - Lifetime
- 1993-08-26 JP JP5247640A patent/JPH06194613A/ja active Pending
- 1993-08-26 DE DE4328777A patent/DE4328777B4/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB9317245D0 (en) | 1993-10-06 |
SE9202446D0 (sv) | 1992-08-26 |
JPH06194613A (ja) | 1994-07-15 |
FR2695212A1 (fr) | 1994-03-04 |
GB2270174B (en) | 1996-03-27 |
US5416866A (en) | 1995-05-16 |
SE470454B (sv) | 1994-04-11 |
DE4328777A1 (de) | 1994-03-17 |
GB2270174A (en) | 1994-03-02 |
SE9202446L (sv) | 1994-02-27 |
DE4328777B4 (de) | 2007-11-22 |
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