JP6997186B2 - 光学導波路の屈曲及び/またはひずみを決定するための方法 - Google Patents
光学導波路の屈曲及び/またはひずみを決定するための方法 Download PDFInfo
- Publication number
- JP6997186B2 JP6997186B2 JP2019529688A JP2019529688A JP6997186B2 JP 6997186 B2 JP6997186 B2 JP 6997186B2 JP 2019529688 A JP2019529688 A JP 2019529688A JP 2019529688 A JP2019529688 A JP 2019529688A JP 6997186 B2 JP6997186 B2 JP 6997186B2
- Authority
- JP
- Japan
- Prior art keywords
- bragg
- optical waveguide
- core
- light
- grids
- 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.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims description 134
- 238000000034 method Methods 0.000 title claims description 34
- 238000005452 bending Methods 0.000 title description 30
- 239000000835 fiber Substances 0.000 claims description 65
- 238000005253 cladding Methods 0.000 claims description 32
- 238000011156 evaluation Methods 0.000 claims description 12
- 239000011162 core material Substances 0.000 description 65
- 238000005259 measurement Methods 0.000 description 18
- 238000009826 distribution Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 9
- 230000000737 periodic effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000875 corresponding effect Effects 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000007620 mathematical function Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 230000009466 transformation Effects 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
-
- 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
- G01D5/35306—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 an interferometer arrangement
- G01D5/35309—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 an interferometer arrangement using multiple waves interferometer
- G01D5/35316—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 an interferometer arrangement using multiple waves interferometer using a Bragg gratings
-
- 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
- G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
- G01D5/3538—Optical fibre sensor using a particular arrangement of the optical fibre itself using a particular type of fiber, e.g. fibre with several cores, PANDA fiber, fiber with an elliptic core or the like
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
- G02B6/021—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the core or cladding or coating, e.g. materials, radial refractive index profiles, cladding shape
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
(以下の説明では、Z軸は光の伝搬方向であり、したがってX及びY軸はファイバーの断面の上面図である)。
(座標:ブラッグ格子1:(2.2μm、0μm)、ブラッグ格子2:(-2.2μm、0μm)、ブラッグ格子3:(0μm、2.2μm)、ブラッグ格子4:(0μm、-2.2μm))
6.Y軸上に対向する2つのブラッグ格子がある場合、この方法は、Y軸についても直接実行可能である。
7.位置X=0(すなわちY軸上)において予測される強度は、X軸に沿った点5において決定されたシフトされたモード場について得られる。この強度は、いわゆる仮想の第4の格子強度として使用される。
-異なる波長の少なくとも3つのブラッグ格子の強度を評価し、区別することが可能な評価システム、
-ブラッグ格子の少なくとも3つの相対強度からモード場のシフトを決定するためのアルゴリズム(前述のような)、及び
-可能であれば、曲がっていないファイバーについてブラッグ格子の各空間位置におけるモード場の強度に対する、ブラッグ格子のランダムな、及び製造に関連する強度比を修正する規格化定数の決定、
が、本発明に従う方法で使用されれば有利である。
3 光学導波路
5 ファイバーコア
6 クラッディング
8、9 ブラッグ格子
11 断面平面
20 ブラッグ格子
30 ガウシアン分布
35 強度信号
Claims (10)
- 光伝搬方向に配向された軸方向及びそれに対して垂直に配向された半径方向を有する光学導波路(3)を含むファイバー光学センサ(1)の光学導波路(3)の屈曲及び/またはひずみを決定するための方法であって、
前記光学導波路(3)が、前記軸方向に中央に延在し、前記光学導波路(3)の長さ全体に少なくとも実質的にわたって通る、光を導くためのコア(5)と、前記コア(5)を前記半径方向に取り囲むクラッディング(6)と、を有し、
前記軸方向に延在する前記光学導波路(3)の少なくとも1つの区画であって、前記区画内に導入され、共通の断面平面(11)を通って延在し、前記半径方向に前記光学導波路(3)を通って配置された少なくとも2つのブラッグ格子(8、9、20)を有する少なくとも1つの区画が存在し、
前記ブラッグ格子(8、9、20)が、前記コア(5)内に、及び/または前記コア(5)と前記クラッディング(6)との間の境界上に、及び/または前記光のエバネセンス領域内の前記クラッディング(6)の内側の縁の領域内に挿入され、
前記方法が、
(a)前記光学導波路(3)内に結合される光の反射光部分の強度の参照データを提供する段階と、
(b)前記光学導波路(3)内に結合された光の反射光部分の少なくとも1つの光強度(35)を測定する段階であって、前記光学導波路(3)が、決定されるべき変形を有する、測定する段階と、
(c)前記光強度(35)を前記参照データと比較することによって、前記変形を決定する段階であって、前記ブラッグ格子(8、9、20)の少なくともいくつかが、異なる格子定数を有する、前記変形を決定する段階と、
を含み、
前記断面平面(11)を通って延在する3つまたは4つのブラッグ格子(8、9、20)が、前記区画内に配置された、方法。 - 前記クラッディング(6)の前記内側の縁の領域が、前記クラッディング(6)の厚さの10パーセント未満だけ、前記半径方向において前記クラッディング(6)内に延在する、請求項1に記載の方法。
- 前記断面平面(11)を通って延在する3つのブラッグ格子(8、9、20)が、前記区画内に配置され、前記ブラッグ格子(8、9、20)のうちの1つが、前記コア(5)内に中央に配置され、前記ブラッグ格子(8、9、20)のうちの2つが、前記クラッディング(6)の前記内側の縁の領域内に配置され、または、前記3つのブラッグ格子(8、9、20)が、前記クラッディング(6)の前記内側の縁の領域内に配置された、請求項1に記載の方法。
- 前記断面平面(11)を通って延在する4つのブラッグ格子(8、9、20)が、前記区画内に配置され、特に、前記4つのブラッグ格子(8、9、20)が、前記クラッディング(6)の前記内側の縁の領域内に全て配置され、または前記コア(5)の前記縁にすべて配置され、または前記コア(5)の外側の縁の領域にすべて配置された、請求項1または2に記載の方法。
- 前記ブラッグ格子(8、9、20)が、前記コア(5)の中心の周りに対称的に分布されるように配置された、請求項1から4のいずれか一項に記載の方法。
- 前記ブラッグ格子(8、9、20)が、前記コア(5)の最大直径の半分未満の最大直径を有する、請求項1から5のいずれか一項に記載の方法。
- 少なくとも2つの光強度(35)が測定され、3次元変形が、前記光強度(35)を前記参照データと比較することによって決定される、請求項1から6のいずれか一項に記載の方法。
- 前記光強度(35)が、前記変形を決定する際に、分光計及び/またはAWGフィルター素子及び/またはFGBフィルター素子によって評価される、請求項1から7のいずれか一項に記載の方法。
- 前記光学導波路に結合された光の波長多重化及び/または時間分解多重化が、変形を決定できるように実行され、及び/または、前記変形を決定する際に、前記光強度(35)の評価が、波長多重化及び/または時間分解多重化によって実行される、請求項1から8のいずれか一項に記載の方法。
- 前記光学導波路(3)に結合される光の反射光部分の強度についての参照データが、前記光学導波路の既知の参照変形に依存して提供される、請求項1から9のいずれか一項に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016214887.7A DE102016214887A1 (de) | 2016-08-10 | 2016-08-10 | Faseroptischer Sensor sowie Verfahren zu dessen Herstellung und Verwendung |
DE102016214887.7 | 2016-08-10 | ||
PCT/EP2017/070006 WO2018029165A1 (de) | 2016-08-10 | 2017-08-08 | Verfahren zur bestimmung der krümmung und/oder torsion eines lichtwellenleiters |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2019531487A JP2019531487A (ja) | 2019-10-31 |
JP6997186B2 true JP6997186B2 (ja) | 2022-01-17 |
Family
ID=59683518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019529688A Active JP6997186B2 (ja) | 2016-08-10 | 2017-08-08 | 光学導波路の屈曲及び/またはひずみを決定するための方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10969541B2 (ja) |
EP (1) | EP3497409A1 (ja) |
JP (1) | JP6997186B2 (ja) |
DE (1) | DE102016214887A1 (ja) |
WO (1) | WO2018029165A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019123468B3 (de) * | 2019-09-02 | 2021-01-07 | Fisens Gmbh | Vorrichtung für optische Anwendungen |
WO2021047779A1 (de) | 2019-09-12 | 2021-03-18 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren und vorrichtung zur bestimmung der form eines lichtwellenleiters sowie vorrichtung zur erzeugung von trainingsdaten für ein neuronales netz |
US11822084B2 (en) * | 2020-04-02 | 2023-11-21 | Google Llc | Direction of light propagation in wearable optical devices |
EP4163586A4 (en) * | 2020-06-05 | 2024-02-21 | Nippon Telegraph And Telephone Corporation | FORM MEASURING SYSTEM AND FORM MEASURING METHOD |
WO2022029872A1 (ja) * | 2020-08-04 | 2022-02-10 | 日本電信電話株式会社 | 光ファイバ及び光ファイバ伝送システム |
WO2022029871A1 (ja) * | 2020-08-04 | 2022-02-10 | 日本電信電話株式会社 | 光ファイバ |
TWI750103B (zh) * | 2021-07-16 | 2021-12-11 | 明志科技大學 | 全固態鋰電池之鋰箔陽極的製備方法 |
CN116336970B (zh) * | 2022-12-28 | 2023-10-03 | 深圳大学 | 光纤包层光栅传感器及其测斜方法和光纤包层光栅测斜仪 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006285234A (ja) | 2005-03-22 | 2006-10-19 | Matsushita Electric Ind Co Ltd | 超高速レーザ直接書込加工された一体型回折素子を備えたマルチコア光ファイバ |
US20070230861A1 (en) | 2004-05-14 | 2007-10-04 | Igor Khrushchev | Laser Inscribed Structures |
US20070297712A1 (en) | 2006-06-08 | 2007-12-27 | Chiara Meneghini | Optical fiber sensor and method |
JP2008190910A (ja) | 2007-02-01 | 2008-08-21 | Nagoya Institute Of Technology | 曲がり度合い検出装置およびそれを用いた曲がり度合い検出方法 |
JP2010107239A (ja) | 2008-10-28 | 2010-05-13 | Olympus Medical Systems Corp | 形状測定装置 |
JP2011180133A (ja) | 2010-02-03 | 2011-09-15 | Soka Univ | 光ファイバセンサ及びその製造方法 |
JP2012220241A (ja) | 2011-04-05 | 2012-11-12 | Olympus Corp | 光学式曲がり測定装置 |
US20130308138A1 (en) | 2011-01-28 | 2013-11-21 | Koninklijke Philips N.V. | Fiber optic sensor for determining 3d shape |
JP2015034787A (ja) | 2013-08-09 | 2015-02-19 | オリンパス株式会社 | 光学式センサと、光学式センサを有する光学式センサシステムと、光学式センサシステムを有する内視鏡 |
WO2016147261A1 (ja) | 2015-03-13 | 2016-09-22 | オリンパス株式会社 | 光学式曲がり測定装置及び管状挿入体 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4053645B2 (ja) | 1998-02-03 | 2008-02-27 | 株式会社フジクラ | 光導波路グレーティングセンサ |
US7376307B2 (en) * | 2004-10-29 | 2008-05-20 | Matsushita Electric Industrial Co., Ltd | Multimode long period fiber bragg grating machined by ultrafast laser direct writing |
DE102005030753B4 (de) * | 2005-06-29 | 2018-04-12 | Hottinger Baldwin Messtechnik Gmbh | Optischer Dehnungsmessstreifen |
US20100166358A1 (en) * | 2008-12-30 | 2010-07-01 | Daniel Homa | Dual Fiber Grating and Methods of Making and Using Same |
US8701500B2 (en) * | 2011-12-02 | 2014-04-22 | Lake Shore Cryotronics, Inc. | Method and apparatus for fixing strained optical fibers against creep and temperature and strain sensors using said technology |
DE102012214441B4 (de) | 2012-08-14 | 2020-08-06 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Messverfahren |
DE102014211918A1 (de) | 2014-06-23 | 2015-12-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Faseroptischer Sensor sowie Verfahren zu dessen Herstellung und Verwendung |
-
2016
- 2016-08-10 DE DE102016214887.7A patent/DE102016214887A1/de active Pending
-
2017
- 2017-08-08 WO PCT/EP2017/070006 patent/WO2018029165A1/de active Search and Examination
- 2017-08-08 US US16/320,636 patent/US10969541B2/en active Active
- 2017-08-08 EP EP17755093.6A patent/EP3497409A1/de active Pending
- 2017-08-08 JP JP2019529688A patent/JP6997186B2/ja active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070230861A1 (en) | 2004-05-14 | 2007-10-04 | Igor Khrushchev | Laser Inscribed Structures |
JP2006285234A (ja) | 2005-03-22 | 2006-10-19 | Matsushita Electric Ind Co Ltd | 超高速レーザ直接書込加工された一体型回折素子を備えたマルチコア光ファイバ |
US20070297712A1 (en) | 2006-06-08 | 2007-12-27 | Chiara Meneghini | Optical fiber sensor and method |
JP2008190910A (ja) | 2007-02-01 | 2008-08-21 | Nagoya Institute Of Technology | 曲がり度合い検出装置およびそれを用いた曲がり度合い検出方法 |
JP2010107239A (ja) | 2008-10-28 | 2010-05-13 | Olympus Medical Systems Corp | 形状測定装置 |
JP2011180133A (ja) | 2010-02-03 | 2011-09-15 | Soka Univ | 光ファイバセンサ及びその製造方法 |
US20130308138A1 (en) | 2011-01-28 | 2013-11-21 | Koninklijke Philips N.V. | Fiber optic sensor for determining 3d shape |
JP2012220241A (ja) | 2011-04-05 | 2012-11-12 | Olympus Corp | 光学式曲がり測定装置 |
JP2015034787A (ja) | 2013-08-09 | 2015-02-19 | オリンパス株式会社 | 光学式センサと、光学式センサを有する光学式センサシステムと、光学式センサシステムを有する内視鏡 |
WO2016147261A1 (ja) | 2015-03-13 | 2016-09-22 | オリンパス株式会社 | 光学式曲がり測定装置及び管状挿入体 |
Also Published As
Publication number | Publication date |
---|---|
DE102016214887A1 (de) | 2018-02-15 |
WO2018029165A1 (de) | 2018-02-15 |
US10969541B2 (en) | 2021-04-06 |
EP3497409A1 (de) | 2019-06-19 |
US20190170930A1 (en) | 2019-06-06 |
JP2019531487A (ja) | 2019-10-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6997186B2 (ja) | 光学導波路の屈曲及び/またはひずみを決定するための方法 | |
Wolf et al. | Arrays of fiber Bragg gratings selectively inscribed in different cores of 7-core spun optical fiber by IR femtosecond laser pulses | |
CN110073174B (zh) | 使用具有多种光传播模式的单芯的感测光纤确定形状参数的方法和装置 | |
US20070201793A1 (en) | Multi-core optical fiber and method of making and using same | |
US9612394B2 (en) | Fibre-optic sensor and use thereof | |
US10247583B2 (en) | Fiber-optic sensor and method for the production and use thereof | |
JPS6351243B2 (ja) | ||
JP2001525070A (ja) | 光ファイバ曲りセンサ | |
US11473943B2 (en) | Optical fiber sensor | |
Moreno-Hernández et al. | Long-range interferometric displacement sensing with tapered optical fiber tips | |
JP2018163370A (ja) | 低後方反射の光ファイバ成端 | |
US10161767B2 (en) | Diagnostic and measurement system comprising a branched optical fiber embedded in a structural element | |
Westbrook et al. | Distributed sensing over meter lengths using twisted multicore optical fiber with continuous Bragg gratings | |
Waltermann et al. | Fiber-optical 3d shape sensing | |
Datta et al. | Multimode interference-based highly sensitive strain sensor by illuminating with a Bessel-Gauss beam | |
JP4916739B2 (ja) | 曲がりセンサ | |
Djordjevich et al. | Principles of deflection-curvature measurement | |
US20230137926A1 (en) | System for measuring microbends and arbitrary microdeformations along a three-dimensional space | |
KR102676195B1 (ko) | 광섬유 일체형 온도 센서 및 이를 이용한 온도 측정 장치 | |
Wolf et al. | Direct core-selective inscription of Bragg grating structures in seven-core optical fibers by femtosecond laser pulses | |
JP7006964B2 (ja) | 光ファイバ式計測装置及び光ファイバ式計測方法 | |
Idrisov et al. | Optimisation of fibre Bragg gratings inscription in multicore fibres | |
KR101536074B1 (ko) | 광학구체를 갖는 광섬유 변위센서 및 이를 이용한 변위 센싱 시스템 | |
KR20140101078A (ko) | 광섬유 격자 센서 | |
US20220341763A1 (en) | Device for optical applications |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20190409 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20200316 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20210212 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20210329 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20210629 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20210823 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20211122 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20211216 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6997186 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |