CA2479245A1 - Methode et dispositif produisant de la lumiere depolarisee - Google Patents
Methode et dispositif produisant de la lumiere depolarisee Download PDFInfo
- Publication number
- CA2479245A1 CA2479245A1 CA002479245A CA2479245A CA2479245A1 CA 2479245 A1 CA2479245 A1 CA 2479245A1 CA 002479245 A CA002479245 A CA 002479245A CA 2479245 A CA2479245 A CA 2479245A CA 2479245 A1 CA2479245 A1 CA 2479245A1
- Authority
- CA
- Canada
- Prior art keywords
- polarization
- light
- beam splitter
- coupled
- output
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract 8
- 230000010287 polarization Effects 0.000 claims abstract 23
- 230000003111 delayed effect Effects 0.000 claims abstract 2
- 239000000835 fiber Substances 0.000 claims 12
- 230000002999 depolarising effect Effects 0.000 claims 2
- 238000005562 fading Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
Classifications
-
- 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
- G01D5/32—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 with attenuation or whole or partial obturation of beams of light
- G01D5/34—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/344—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using polarisation
- G01D5/345—Polarising encoders
-
- 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
- G01D5/32—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 with attenuation or whole or partial obturation of beams of light
- G01D5/34—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35303—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using a reference fibre, e.g. interferometric devices
-
- 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
- G01D5/32—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 with attenuation or whole or partial obturation of beams of light
- G01D5/34—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35383—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Communication System (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Méthode et dispositif produisant de la lumière dépolarisée qui est utile pour former des signaux d'interrogation pour un réseau de capteurs optiques et un démodulateur présentant un évanouissement induit par une polarisation réduite et un bruit de phase. La lumière dépolarisée est produite en divisant un faisceau de lumière, en retardant une première composante orthogonale du faisceau lumineux par rapport à une seconde composante orthogonale du faisceau de lumière au moyen d'un retard prédéfini, tout en maintenant la polarisation de la première composante orthogonale et la polarisation de la deuxième composante orthogonale. Les faisceaux de lumière retardés sont combinés pour produire un faisceau de lumière dépolarisé en sélectionnant un retard prédéfini qui entraîne un signal d'interférence présentant un retard égal au retard prédéfini à être supprimé pendant un processus de démodulation.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/650,117 US7081959B2 (en) | 2003-08-27 | 2003-08-27 | Method and apparatus for providing polarization insensitive signal processing for interferometric sensors |
US10/649,590 | 2003-08-27 | ||
US10/649,590 US7088878B2 (en) | 2003-08-27 | 2003-08-27 | Method and apparatus for producing depolarized light |
US10/650,117 | 2003-08-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2479245A1 true CA2479245A1 (fr) | 2005-02-27 |
CA2479245C CA2479245C (fr) | 2010-01-12 |
Family
ID=33135364
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002479245A Expired - Lifetime CA2479245C (fr) | 2003-08-27 | 2004-08-25 | Methode et dispositif produisant de la lumiere depolarisee |
CA2639131A Expired - Lifetime CA2639131C (fr) | 2003-08-27 | 2004-08-25 | Methode et dispositif assurant le traitement des signaux insensibles a la polarisation pour capteurs interferometriques |
CA002479081A Expired - Lifetime CA2479081C (fr) | 2003-08-27 | 2004-08-25 | Methode et dispositif assurant le traitement des signaux insensibles a la polarisation pour capteurs interferometriques |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2639131A Expired - Lifetime CA2639131C (fr) | 2003-08-27 | 2004-08-25 | Methode et dispositif assurant le traitement des signaux insensibles a la polarisation pour capteurs interferometriques |
CA002479081A Expired - Lifetime CA2479081C (fr) | 2003-08-27 | 2004-08-25 | Methode et dispositif assurant le traitement des signaux insensibles a la polarisation pour capteurs interferometriques |
Country Status (2)
Country | Link |
---|---|
CA (3) | CA2479245C (fr) |
GB (2) | GB2405469B (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7466425B2 (en) * | 2005-04-22 | 2008-12-16 | Agilent Technologies, Inc. | Elementary matrix based optical signal/network analyzer |
WO2015165924A1 (fr) * | 2014-04-28 | 2015-11-05 | Optoplan As | Système de capteurs interférométriques à fibres optiques et procédé d'interrogation |
WO2016086310A1 (fr) * | 2014-12-04 | 2016-06-09 | Hifi Engineering Inc. | Interrogateur optique permettant de réaliser une interférométrie au moyen de réseaux de bragg sur fibre |
GB2568305B (en) | 2017-11-13 | 2022-06-15 | Univ Cranfield | A fibre optic sensing device |
CN109631962B (zh) * | 2018-12-20 | 2020-12-04 | 中国人民解放军国防科技大学 | 一种基于pgc方案的多频载波偏振调制解调系统及方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5173743A (en) * | 1991-05-28 | 1992-12-22 | Litton Systems, Inc. | Fiber optical time-division-multiplexed unbalanced pulsed interferometer with polarization fading compensation |
EP0570151B1 (fr) * | 1992-05-08 | 1997-10-29 | Kokusai Denshin Denwa Co., Ltd | Emetteur optique avec un signal lumineux de degré de polarisation réduit et circuit optique de dépolarisation |
US6574015B1 (en) * | 1998-05-19 | 2003-06-03 | Seagate Technology Llc | Optical depolarizer |
NO322073B1 (no) * | 1999-06-23 | 2006-08-07 | Optoplan As | Fremgangsmate for polarisasjonskontroll |
CA2393172C (fr) * | 2002-07-12 | 2008-11-04 | Itf Technologies Optiques Inc.- Itf Optical Technologies Inc. | Depolariseur tout en fibres de conception lineaire |
-
2004
- 2004-08-25 CA CA002479245A patent/CA2479245C/fr not_active Expired - Lifetime
- 2004-08-25 CA CA2639131A patent/CA2639131C/fr not_active Expired - Lifetime
- 2004-08-25 CA CA002479081A patent/CA2479081C/fr not_active Expired - Lifetime
- 2004-08-26 GB GB0419047A patent/GB2405469B/en not_active Expired - Lifetime
- 2004-08-27 GB GB0419163A patent/GB2406166B/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB2406166B (en) | 2006-07-05 |
CA2479245C (fr) | 2010-01-12 |
GB0419047D0 (en) | 2004-09-29 |
GB2406166A (en) | 2005-03-23 |
GB0419163D0 (en) | 2004-09-29 |
GB2405469B (en) | 2006-11-29 |
CA2479081A1 (fr) | 2005-02-27 |
GB2405469A (en) | 2005-03-02 |
CA2639131C (fr) | 2010-01-26 |
CA2479081C (fr) | 2008-11-25 |
CA2639131A1 (fr) | 2005-02-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request |