JP2020126006A - 磁界センサ装置 - Google Patents
磁界センサ装置 Download PDFInfo
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Images
Classifications
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- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
- G01R33/0322—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect using the Faraday or Voigt effect
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
-
- 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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
- G02B6/2766—Manipulating the plane of polarisation from one input polarisation to another output polarisation, e.g. polarisation rotators, linear to circular polarisation converters
-
- 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
- G02F1/09—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 magneto-optical elements, e.g. exhibiting Faraday effect
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/007—Environmental aspects, e.g. temperature variations, radiation, stray fields
-
- 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
- G02B6/024—Optical fibres with cladding with or without a coating with polarisation maintaining properties
-
- 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
- G02F2201/02—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 fibre
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Measuring Magnetic Variables (AREA)
- Optical Couplings Of Light Guides (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
図1は、実施形態に係る磁界センサ装置を示すブロック図である。
磁界センサ装置1は、光学軸が視認し難い1/4波長板の代わりに光学軸が視認し易い偏波保持ファイバを直線偏波光を円偏波光に変換する偏波変換素子として使用するので、単一の光路により形成可能であり且つ簡便に製造可能である。
10 発光部
20 光分岐部
30 磁界センサ素子
31 第1偏波保持ファイバ
32 第2偏波保持ファイバ
33 ファラデー回転子
34 ミラー素子
40 検出信号発生部
Claims (6)
- 直線偏波光を出射する発光部と、
前記直線偏波光が入射光として導入され、該入射光に応じた戻り光を導出し、且つ、少なくともその一部が所定の磁界内に配置可能な磁界センサ素子と、
前記戻り光をS偏光成分及びP偏光成分に分離し、前記S偏光成分及び前記P偏光成分に基づいて前記磁界センサ素子が配置される磁界に応じた検出信号を出力する検出信号発生部と、
前記直線偏波光を前記磁界センサ素子へ透過させ、且つ、前記戻り光を前記検出信号発生部へ分岐する光分岐部と、を有し、
前記磁界センサ素子は、
前記直線偏波光を、第1遅相軸に沿って伝搬される第1直線偏波と、前記第1遅相軸と直交する第1進相軸に沿って前記第1直線偏波の伝搬速度より速く伝搬される第2直線偏波とに分離して伝搬する第1偏波保持ファイバと、
第2遅相軸及び第2進相軸を有し、前記第1遅相軸及び第1進相軸が前記第2遅相軸及び第2進相軸とそれぞれ45度傾くように前記第1偏波保持ファイバと接続された第2偏波保持ファイバと、
前記第2偏波保持ファイバと光学的に接続され、前記第2偏波保持ファイバから出射された円偏波光の位相を前記磁界センサ素子が配置される磁界に応じて変化させるファラデー回転子と、
前記ファラデー回転子と接続され、且つ、前記戻り光を発生させるミラー素子と、を有する、
ことを特徴とする磁界センサ装置。 - 前記第2偏波保持ファイバの長さは、前記第2偏波保持ファイバのビート長の0倍及び正の整数倍の長さから前記ビート長の4分の1の長さを増加させた長さである、請求項1に記載の磁界センサ装置。
- 前記第2偏波保持ファイバの長さは、前記第2偏波保持ファイバのビート長の正の整数倍の長さから前記ビート長の4分の1の長さを減少させた長さである、請求項1に記載の磁界センサ装置。
- 前記第1偏波保持ファイバと前記第2偏波保持ファイバとは融着接続される、請求項1〜3の何れか一項に記載の磁界センサ装置。
- 前記第1偏波保持ファイバ及び前記第2偏波保持ファイバは、何れもPANDAファイバである、請求項1〜4の何れか一項に記載の磁界センサ装置。
- 入射される直線偏波光を、第1遅相軸に沿って伝搬される第1直線偏波と、前記第1遅相軸と直交する第1進相軸に沿って前記第1直線偏波の伝搬速度より速く伝搬される第2直線偏波とに分離して伝搬する第1偏波保持ファイバと、
第2遅相軸及び第2進相軸を有し、前記第1遅相軸及び第1進相軸が前記第2遅相軸及び第2進相軸とそれぞれ45度傾くように前記第1偏波保持ファイバと接続された第2偏波保持ファイバと、
前記第2偏波保持ファイバと光学的に接続され、第2偏波保持ファイバから出射された円偏波光の位相を磁界に応じて変化させるファラデー回転子と、
前記ファラデー回転子と接続され、戻り光を発生させるミラー素子と、
を有することを特徴とする磁界センサ素子。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019019105A JP2020126006A (ja) | 2019-02-05 | 2019-02-05 | 磁界センサ装置 |
US17/427,837 US20220146600A1 (en) | 2019-02-05 | 2019-08-29 | Magnetic field sensor device |
PCT/JP2019/034015 WO2020161952A1 (ja) | 2019-02-05 | 2019-08-29 | 磁界センサ装置 |
EP19914289.4A EP3923011A4 (en) | 2019-02-05 | 2019-08-29 | MAGNETIC FIELD SENSOR |
Applications Claiming Priority (1)
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JP2019019105A JP2020126006A (ja) | 2019-02-05 | 2019-02-05 | 磁界センサ装置 |
Publications (1)
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JP2020126006A true JP2020126006A (ja) | 2020-08-20 |
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JP2019019105A Pending JP2020126006A (ja) | 2019-02-05 | 2019-02-05 | 磁界センサ装置 |
Country Status (4)
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---|---|
US (1) | US20220146600A1 (ja) |
EP (1) | EP3923011A4 (ja) |
JP (1) | JP2020126006A (ja) |
WO (1) | WO2020161952A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022107431A1 (ja) | 2020-11-19 | 2022-05-27 | シチズンファインデバイス株式会社 | 磁界センサヘッド及びその製造方法 |
JP2022135529A (ja) * | 2021-03-05 | 2022-09-15 | 公益財団法人電磁材料研究所 | ナノグラニュラー構造材料およびその作製方法 |
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2019
- 2019-02-05 JP JP2019019105A patent/JP2020126006A/ja active Pending
- 2019-08-29 WO PCT/JP2019/034015 patent/WO2020161952A1/ja unknown
- 2019-08-29 US US17/427,837 patent/US20220146600A1/en not_active Abandoned
- 2019-08-29 EP EP19914289.4A patent/EP3923011A4/en not_active Withdrawn
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JP2022135529A (ja) * | 2021-03-05 | 2022-09-15 | 公益財団法人電磁材料研究所 | ナノグラニュラー構造材料およびその作製方法 |
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