JP2011145283A - 光位相雑音誤差低減器 - Google Patents
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- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
- G01C19/727—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers using a passive ring resonator
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Abstract
【解決手段】共振器ジャイロスコープは、参照光を生成する参照レーザ発生器と、参照光にロックされた第1のスレーブ光を生成する第1のスレーブ光源と、参照光にロックされた第2のスレーブ光を生成する第2のスレーブ光源と、第1及び第2のスレーブ光源のうち少なくとも1つに結合されて第1及び第2のスレーブ光の高周波の変動を取り除く第1の光フィルタキャビティと、第1及び第2の光源に結合され、第1及び第2の反対伝播方向を有する共振器と、共振器に結合されて第1のビート周波数、第2のビート周波数、及び第3のビート周波数を生成する共振追跡電子装置とを具備し、共振器ジャイロスコープの回転速度は第1、第2及び第3のビート周波数の関数である。
【選択図】図4
Description
関連出願の相互参照
本出願は、2009年12月13日に出願された「LIGHT−PHASE−NOISE ERROR REDUCER」なるタイトルの米国仮特許出願第61/285,990号に対する優先権を主張し、それは本出願において’990出願と呼ばれる。
Claims (3)
- 参照光を生成するマスタ光源(402)、
参照光の周波数変動を強度変動へ線形に変換する周波数弁別器(404)、
フィルタ弁別器の光出力の強度の変動を電気的な電圧へ変換する光検出器(406)、
前記光検出器の出力電圧を安定した基準電圧と比較する差動増幅器(408)、及び
前記差動増幅器の出力に基づいて前記マスタ光源に制御信号を提供して、前記参照光の低周波の変動が除去されるように前記マスタ光源を駆動する、サーボ電子装置(412)
を含む参照レーザ発生器(210)と、
第1の周波数を有する第1のスレーブ光を生成する、第1の変調周波数を有する第1のスレーブ光源(82)と、
前記第1のスレーブ光を前記参照光とビートさせ、前記第1のスレーブ光が前記参照光にロックされるように前記第1のスレーブ光源を駆動する、第1の位相ロックループ(PLL)(102)と、
第2の周波数を有する第2のスレーブ光を生成する、第2の変調周波数を有する第2のスレーブ光源(84)と、
前記第2のスレーブ光を前記参照光とビートさせ、前記第2のスレーブ光が前記参照光にロックされるように前記第2のスレーブ光源を駆動する、第2の位相ロックループ(PLL)(104)と、
前記第1及び第2のスレーブ光源の少なくとも1つに結合され、それぞれの第1及び第2のスレーブ光の高周波の変動を取り除く、第1の光フィルタキャビティ(416、716)と、
前記第1及び第2の光源に結合され、第1及び第2の反対伝播方向を有し、光ファイバコイル(24)を含む共振器(54)であって、前記第1の反対伝播方向に前記光ファイバコイルを介して前記第1のスレーブ光の一部に基づく第1の循環する光を循環させ、第2の反対伝播方向に前記光ファイバコイルを介して前記第2のスレーブ光の一部に基づく第2の循環する光を循環させる、共振器(54)と、
前記共振器に結合されて、前記第1の反対伝播方向の第1の共振周波数に基づき第1のビート周波数を生成し、前記第2の反対伝播方向の第2の共振周波数に基づき第2のビート周波数を生成し、前記第2の反対伝播方向の第3の共振周波数に基づき第3のビート周波数を生成する、共振追跡電子装置(56)と
を具備し、
前記第2の共振周波数は前記第1の共振周波数より低い少なくとも1つの共振モードにあり、前記第3の共振周波数は前記第1の共振周波数より高い少なくとも1つの共振モードにあり、前記共振器ジャイロスコープの回転速度は前記第1、第2及び第3のビート周波数の関数である、
共振器ジャイロスコープ(50)。 - 前記周波数弁別器は共振曲線において線形部分を有する光共振器を含み、前記サーボ電子装置は、周波数変動が強度変動へと線形に変換されるように、前記共振曲線の前記線形部分における周波数へ前記マスタ光源をロックする、
請求項1に記載の共振器ジャイロスコープ。 - 第3の周波数を有する第3のスレーブ光を生成する、第3の変調周波数を有する第3のスレーブ光源と、
前記第3のスレーブ光を前記参照光とビートさせ、前記第3のスレーブ光が前記参照光にロックされるように前記第3のスレーブ光源を駆動する、第3の位相ロックループ(PLL)と
をさらに具備し、
前記共振器は、前記第2の反対伝播方向に前記光ファイバコイルを介して前記第3のスレーブ光の一部に基づく第3の循環する光を循環させる、
請求項1に記載の共振器ジャイロスコープ。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28599009P | 2009-12-13 | 2009-12-13 | |
US61/285,990 | 2009-12-13 | ||
US12/644,271 US8009296B2 (en) | 2009-12-13 | 2009-12-22 | Light-phase-noise error reducer |
US12/644,271 | 2009-12-22 |
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JP2011145283A true JP2011145283A (ja) | 2011-07-28 |
JP5690559B2 JP5690559B2 (ja) | 2015-03-25 |
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JP2010257960A Expired - Fee Related JP5690559B2 (ja) | 2009-12-13 | 2010-11-18 | 光位相雑音誤差低減器 |
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US (1) | US8009296B2 (ja) |
EP (1) | EP2333482B1 (ja) |
JP (1) | JP5690559B2 (ja) |
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EP2333482A3 (en) | 2012-03-07 |
US8009296B2 (en) | 2011-08-30 |
JP5690559B2 (ja) | 2015-03-25 |
EP2333482B1 (en) | 2019-01-09 |
EP2333482A2 (en) | 2011-06-15 |
US20110141477A1 (en) | 2011-06-16 |
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