JP2009168465A - 位相変調子、位相変調子組体及び光センサ - Google Patents
位相変調子、位相変調子組体及び光センサ Download PDFInfo
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Abstract
【解決手段】本発明は、引っ張り応力に対する偏波面保持ファイバ内を伝播する光の位相変化の違いを利用し、位相変調子10、送光用偏波面保持ファイバ23、コイル状偏波面保持ファイバ光学素子30に適切な偏波面保持ファイバを使用することにより、高精度な測定が可能な光センサを実現する。
【選択図】 図19
Description
円柱に対して外部より横荷重ベクトルFが印加された場合の円柱中心軸(z軸)上の作用応力は、非特許文献6のMuskhelishviliにより数学的に解析されている。すなわち、図3に示すように、円柱105の直径をdとすると、円柱中心軸上で外力Fの方向には、
上記の横荷重、縦荷重に対する光ファイバの位相変化率S1,S2から実際にどちらの荷重の影響が大きいのか評価を行う。以下、光ファイバは一般的な石英シングルモードファイバとして評価する。尚、石英シングルモードファイバの物性値は、図5の表1にまとめた通りである。
図1に示したPZT101の周りに偏波面保持ファイバ102を巻きつけて構成される位相変調子100は、PZT101の径方向伸縮変位により生じる偏波面保持ファイバ102の伸縮(縦荷重)により位相変化が生じる。この際、偏波面保持ファイバ102の2つの光学軸それぞれに対して位相変化が生じ、それぞれの軸の位相変化の相対的な差が有効な位相変化分となる。そこで、どのようなタイプの偏波面保持ファイバが縦加重に対してどれだけ位相変化を及ぼすかが重要となる。以上の点から、図6(a)に示したパンダ型ファイバ111、同図(b)に示したボウタイファイバ112、同図(c)に示した楕円コアファイバ113の3種類の偏波面保持ファイバに対して縦荷重を与えた場合の位相変化の評価を以下で行う。
Muskhelishvili, N. I., "Some basic problems of the mathematical theory of elasticity" (P. Noordhoff, Groningen, Holland, 1953), p324-328 Smith, A. M., Electronics Letters, vol.16, No.20, p773-774, 1980 以上の評価を元に、以下、本発明の実施の形態を具体的に説明する。
10D 振動吸収材
11,11A,11B 圧電素子
12,12A,12B,12D 偏波面保持ファイバ
12a,12b 光伝播軸
21 光センシング部
22 信号処理ユニット
23,23A,23B,23C 偏波面保持ファイバ
232 弾性材
233 硬質被覆層
234 ファイバコア
235 保護管
236 防音・防振材
237 防音壁
238 穴開き保護管
239 網目状保護管
Claims (23)
- ボディに機械的振動を誘起する特性を備えた円筒状若しくは円柱状のアクチュエータの周りに、互いに直交する2つの光伝播軸を有する偏波面保持ファイバをそれらの2つの光伝播軸に対して共に約45°の方向に前記機械的振動による機械的応力を受ける態様にて巻装して成る位相変調子。
- 前記アクチュエータは圧電素子であり、
前記圧電素子の周りに、前記偏波面保持ファイバの光伝播軸と圧電素子の径方向とのなす角度が約45°になるように巻き付けたことを特徴とする請求項1に記載の位相変調子。 - ボディに機械的振動を誘起する特性を備えた円筒状若しくは円柱状のアクチュエータの周りに、互いに直交する2つの光伝播軸を有する偏波面保持ファイバをそれらの2つの光伝播軸に対してほぼ等方的な機械的応力を与える態様にて巻装したことを特徴とする位相変調子。
- ボディに機械的振動を誘起する特性を備えた円筒状若しくは円柱状のアクチュエータの周りに互いに直交する2つの光伝播軸を有する偏波面保持ファイバを所定の捻り率で巻き付けて構成したことを特徴とする位相変調子。
- 前記偏波面保持ファイバにパンダ型ファイバを用いたことを特徴とする請求項1〜4のいずれかに記載の位相変調子。
- 前記偏波面保持ファイバにクラッド径約80μmのパンダ型ファイバを用いたことを特徴とする請求項5に記載の位相変調子。
- 前記偏波面保持ファイバを、その側圧方向に対して硬質な被覆材にて被覆したことを特徴とする請求項1〜6のいずれかに記載の位相変調子。
- 前記偏波面保持ファイバの被覆材に紫外線硬化樹脂を使用したことを特徴とする請求項7に記載の位相変調子。
- 前記偏波面保持ファイバの被覆に金属コート皮膜を使用したことを特徴とする請求項7に記載の位相変調子。
- 前記アクチュエータとしてセラミック素子を使用したことを特徴とする請求項1、3、5〜9のいずれかに記載の位相変調子。
- 請求項1に記載の位相変調子を防振材に組み付けて成る位相変調子組体。
- 被測定物理量を測定する光センシング部と、前記光センシング部からの光信号より所定の物理量を演算する信号処理ユニットと、前記光センシング部と信号処理ユニットとの間を光学的に接続する光ファイバとを備え、前記光ファイバは、2つの光伝播軸を有する偏波面保持ファイバであり、前記偏波面保持ファイバの2つの光伝播軸それぞれに光を伝播させる光センサにおいて、
前記偏波面保持ファイバとして、引っ張り応力に対して前記2つの光伝播軸の伝播定数差の変化が小さい偏波面保持ファイバを用いたことを特徴とする光センサ。 - 前記光センシング部と信号処理ユニットを光学的に接続する偏波面保持ファイバとして、ボウタイファイバを使用したことを特徴とする請求項12に記載の光センサ。
- 前記光センシング部と信号処理ユニットとを光学的に接続する偏波面保持ファイバとして、クラッド径約80μmのボウタイファイバを使用したことを特徴とする請求項13に記載の光センサ。
- 前記光センシング部と信号処理ユニットとを光学的に接続する偏波面保持ファイバとして、楕円コアファイバを使用したことを特徴とする請求項12に記載の光センサ。
- 前記光センシング部と信号処理ユニットとを光学的に接続する偏波面保持ファイバとして、クラッド径約80μmの楕円コアファイバを使用したことを特徴とする請求項15に記載の光センサ。
- 前記光センシング部と信号処理ユニットとを光学的に接続する偏波面保持ファイバの被覆は、クラッドの周りに弾性体が取り囲むように構成したものであることを特徴とする請求項12〜16のいずれかに記載の光センサ。
- 前記光センシング部と信号処理ユニットとを光学的に接続する偏波面保持ファイバは、外部から引っ張り応力が印加されないように保護管に挿入され、かつ、前記保護管の内部は振動や音響による共振が発生しない構造をしていることを特徴とする請求項12〜17のいずれかに記載の光センサ。
- 前記偏波面保持ファイバと保護管との間に音吸収材を充填したことを特徴とする請求項18に記載の光センサ。
- 前記保護管には、側面に所定の間隔で穴が設けられていることを特徴とする請求項17又は19に記載の光センサ。
- 被測定物理量を測定する光センシング部と、前記光センシング部からの光信号より所定の物理量を演算する信号処理ユニットと、前記光センシング部と信号処理ユニットとの間を光学的に接続する光ファイバとを備えた光センサにおいて、
位相変調子を除くコイル状の偏波面保持ファイバで構成される光学素子には、前記偏波面保持ファイバとして、引っ張り応力に対して2つの光伝播軸の伝播定数差の変化が小さい偏波面保持ファイバを用いたことを特徴とする光センサ。 - 前記偏波面保持ファイバにボウタイファイバを使用したことを特徴とする請求項21に記載の光センサ。
- 前記偏波面保持ファイバに楕円コアファイバを使用したことを特徴とする請求項21に記載の光センサ。
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CA2810375A CA2810375C (en) | 2008-01-10 | 2009-01-09 | Phase modulator, phase modulator assembly, and photosensor |
PCT/JP2009/050207 WO2009088072A1 (ja) | 2008-01-10 | 2009-01-09 | 位相変調子、位相変調子組体及び光センサ |
CA2810278A CA2810278C (en) | 2008-01-10 | 2009-01-09 | Phase modulator, phase modulator assembly, and photosensor |
CN2009801019182A CN101910799B (zh) | 2008-01-10 | 2009-01-09 | 相位调制器件、相位调制器件组体及光传感器 |
US12/812,320 US8319958B2 (en) | 2008-01-10 | 2009-01-09 | Phase modulator, phase modulator assembly, and photosensor |
EP09700849.4A EP2239542B1 (en) | 2008-01-10 | 2009-01-09 | Phase modulator, phase modulator assembly, and optical sensor |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013253922A (ja) * | 2012-06-08 | 2013-12-19 | Toshiba Corp | 光電流センサ |
JP2015078968A (ja) * | 2013-10-18 | 2015-04-23 | 株式会社東芝 | 位相変調子及びそれを用いた光電流センサ |
CN114226812A (zh) * | 2021-12-03 | 2022-03-25 | 镇江金业工具有限公司 | 一种自进式高效钻头结构 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9010965B2 (en) | 2011-01-21 | 2015-04-21 | Clear Align Llc | System and apparatuses providing laser illumination with reduced or zero speckle |
DE102015004039A1 (de) | 2015-03-27 | 2016-09-29 | Northrop Grumman Litef Gmbh | Mittelwertfrei gesteuerter Phasenmodulator für faseroptische Kreisel und faseroptischer Kreisel |
US10444550B1 (en) * | 2017-06-26 | 2019-10-15 | Agiltron, Inc. | Electro-optical material mounting configuration for high speed operation |
CN115266075B (zh) * | 2022-09-26 | 2023-02-17 | 中交第一公路勘察设计研究院有限公司 | 鼓凸自感知的板式支座及制作方法、监测系统及监测方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01238297A (ja) * | 1988-01-25 | 1989-09-22 | Thomson Csf | 光ファイバハイドロフォンおよび一連のハイドロフォンを結合したアンテナ |
JPH0221213A (ja) * | 1988-07-08 | 1990-01-24 | Japan Aviation Electron Ind Ltd | 光干渉角速度計及び慣性装置 |
JPH02163709A (ja) * | 1988-12-19 | 1990-06-25 | Sumitomo Electric Ind Ltd | ファイバ型偏光位相変調器及びその製造方法 |
JPH06167628A (ja) * | 1992-11-30 | 1994-06-14 | Sumitomo Electric Ind Ltd | ファイバ型偏光子及びその製作方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2616538B1 (fr) * | 1987-06-11 | 1989-09-01 | Alsthom | Systeme interferometrique a fibre optique de type sagnac |
HU206242B (en) | 1988-04-18 | 1992-10-28 | Sandoz Ag | Herbicidal compositions comprising substituted benzoyl bicyclodione derivatives as active ingredient |
JPH026425U (ja) | 1988-06-24 | 1990-01-17 | ||
CA2013026A1 (en) | 1989-05-18 | 1990-11-18 | Allen R. Syrinek | Dewatering agents for polymer slurries |
US6134003A (en) * | 1991-04-29 | 2000-10-17 | Massachusetts Institute Of Technology | Method and apparatus for performing optical measurements using a fiber optic imaging guidewire, catheter or endoscope |
JP3006205B2 (ja) | 1991-09-17 | 2000-02-07 | 住友電気工業株式会社 | 光ファイバ偏光子 |
JPH05297292A (ja) | 1992-02-17 | 1993-11-12 | Sumitomo Electric Ind Ltd | 光ファイバ位相変調器 |
DE4223740A1 (de) * | 1992-07-18 | 1994-01-20 | Teldix Gmbh | Phasenmodulator und Depolarisator für einen Faserkreisel |
JPH06307875A (ja) * | 1993-02-24 | 1994-11-04 | Sumitomo Electric Ind Ltd | 信号検出方法及び位相変調度変動の検出方法 |
JPH06265361A (ja) | 1993-03-12 | 1994-09-20 | Matsushita Electric Ind Co Ltd | 位相変調器およびそれを用いた光回転検出装置 |
CN2185449Y (zh) * | 1994-02-19 | 1994-12-14 | 东南大学 | 全光纤相位调制器 |
US5493623A (en) * | 1994-06-28 | 1996-02-20 | Honeywell Inc. | PZT fiber optic modulator having a robust mounting and method of making same |
TW312744B (ja) * | 1994-10-11 | 1997-08-11 | Adoban Tesuto Kk | |
US5552887A (en) * | 1995-04-07 | 1996-09-03 | Andrew Corporation | Fiber optic rotation sensor or gyroscope with improved sensing coil |
US6097486A (en) | 1998-04-03 | 2000-08-01 | The Board Of Trustees Of The Leland Stanford Junior University | Fiber optic acoustic sensor array based on Sagnac interferometer |
JP2006208080A (ja) | 2005-01-26 | 2006-08-10 | Hitachi Cable Ltd | 光ファイバ振動センサ |
JP2007040884A (ja) | 2005-08-04 | 2007-02-15 | Hitachi Cable Ltd | 反射型光ファイバ電流センサ |
-
2008
- 2008-01-10 JP JP2008003540A patent/JP5268367B2/ja active Active
-
2009
- 2009-01-09 WO PCT/JP2009/050207 patent/WO2009088072A1/ja active Application Filing
- 2009-01-09 EP EP09700849.4A patent/EP2239542B1/en active Active
- 2009-01-09 CA CA2810375A patent/CA2810375C/en active Active
- 2009-01-09 CA CA2711784A patent/CA2711784C/en active Active
- 2009-01-09 CA CA2810278A patent/CA2810278C/en active Active
- 2009-01-09 CN CN2009801019182A patent/CN101910799B/zh active Active
- 2009-01-09 US US12/812,320 patent/US8319958B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01238297A (ja) * | 1988-01-25 | 1989-09-22 | Thomson Csf | 光ファイバハイドロフォンおよび一連のハイドロフォンを結合したアンテナ |
JPH0221213A (ja) * | 1988-07-08 | 1990-01-24 | Japan Aviation Electron Ind Ltd | 光干渉角速度計及び慣性装置 |
JPH02163709A (ja) * | 1988-12-19 | 1990-06-25 | Sumitomo Electric Ind Ltd | ファイバ型偏光位相変調器及びその製造方法 |
JPH06167628A (ja) * | 1992-11-30 | 1994-06-14 | Sumitomo Electric Ind Ltd | ファイバ型偏光子及びその製作方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013253922A (ja) * | 2012-06-08 | 2013-12-19 | Toshiba Corp | 光電流センサ |
JP2015078968A (ja) * | 2013-10-18 | 2015-04-23 | 株式会社東芝 | 位相変調子及びそれを用いた光電流センサ |
CN114226812A (zh) * | 2021-12-03 | 2022-03-25 | 镇江金业工具有限公司 | 一种自进式高效钻头结构 |
CN114226812B (zh) * | 2021-12-03 | 2023-01-13 | 镇江金业工具有限公司 | 一种自进式高效钻头结构 |
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CN101910799B (zh) | 2012-05-16 |
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CA2810375A1 (en) | 2009-07-16 |
CA2711784C (en) | 2013-10-22 |
CA2810278A1 (en) | 2009-07-16 |
CA2810278C (en) | 2015-05-26 |
CN101910799A (zh) | 2010-12-08 |
US20100315621A1 (en) | 2010-12-16 |
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