JP2009526999A - チャープされた電磁放射を提供するシステムおよび方法 - Google Patents
チャープされた電磁放射を提供するシステムおよび方法 Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/484—Transmitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
- G01S17/26—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein the transmitted pulses use a frequency-modulated or phase-modulated carrier wave, e.g. for pulse compression of received signals
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- G—PHYSICS
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- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S17/34—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/491—Details of non-pulse systems
- G01S7/4911—Transmitters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0057—Temporal shaping, e.g. pulse compression, frequency chirping
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- 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
- G02F1/11—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 acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves
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- 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
- G02F2203/00—Function characteristic
- G02F2203/15—Function characteristic involving resonance effects, e.g. resonantly enhanced interaction
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- 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
- G02F2203/00—Function characteristic
- G02F2203/25—Frequency chirping of an optical modulator; Arrangements or methods for the pre-set or tuning thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/1062—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using a controlled passive interferometer, e.g. a Fabry-Perot etalon
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- H—ELECTRICITY
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1103—Cavity dumping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2308—Amplifier arrangements, e.g. MOPA
- H01S3/2325—Multi-pass amplifiers, e.g. regenerative amplifiers
- H01S3/235—Regenerative amplifiers
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Abstract
Description
interferometer)と参照干渉計(reference interferometer)を含む。標的干渉計は、標的ビームを受け取り、そして標的ビームの標的に導かれた部分または標的から反射された部分と、既知の経路長または他の方法で決められた経路長を有する経路にわたって導かれた標的ビームの別の部分との周波数差に対応する標的信号を生成する。この周波数差は、標的干渉計によって、標的ビームの2つの部分から導出された干渉信号に基づいて決定されてもよい。参照干渉計は、参照ビームを受け取り、既知の経路長差を有する2つの別々の一定経路で導かれた参照ビームの2つの部分の間の周波数差に対応する参照信号を生成することができる。この周波数差は、参照ビームの2つの部分から導出された干渉信号に基づいて、参照干渉計によって決定されてもよい。
UTILIZING COHERENT OPTICAL DETECTION」と題する米国特許第5,114,226号に記載されているように構成されてもよく、この特許は、参照により全体が本明細書に組み込まれる。
Signal Corporation, 8003 Forbes Place, Springfield, VA.22151によって提示されたNASA
Langley Contract No. NAS1-18890 (May 1991) Phase II Final Report, Appendix Kで、Anthony
Slotwinskiらによって研究分析されてきており、この論文は、参照によりその全体が本明細書に組み込まれる。
wandering correction)、および他の利点をレーザレーダシステム510に提供することができる。
Model MV200に提供されている機構を使って修正されてもよい。
Claims (19)
- 電磁放射を制御可能にチャープするシステムであって、
光学キャビティを構成する少なくとも1つの光学要素と、
前記光学キャビティ内に配置された周波数シフタであって、前記光学キャビティから電磁放射を受け取り、前記受け取った電磁放射の周波数シフトされた部分を前記光学キャビティに出力する周波数シフタと、
前記光学キャビティ内に配置された光スイッチであって、前記光学キャビティから電磁放射を受け取り、前記受け取った電磁放射を前記光学キャビティから外にダンプするかまたは前記受け取った電磁放射を前記光学キャビティに戻すように制御可能な光スイッチとを備えるシステム。 - 前記光スイッチは、放射源から電磁放射を受け取り、前記放射源から受け取った前記電磁放射を前記光学キャビティから外にダンプするかまたは前記放射源から受け取った前記電磁放射を前記光学キャビティに導くように制御可能である請求項1に記載のシステム。
- 前記光スイッチが、前記光学キャビティから受け取った前記電磁放射を前記光学キャビティに戻すときに、前記光スイッチは、前記放射源から受け取った前記電磁放射をダンプする請求項2に記載のシステム。
- 光増幅器を更に備える請求項1に記載のシステム。
- 前記光増幅器は、前記光学キャビティの1つまたは複数のキャビティ損失に打ち勝つのに十分に大きな利得を有する請求項4に記載のシステム。
- 前記光学キャビティ内の前記電磁放射の一部分は、前記光学キャビティから装置に出力される請求項1に記載のシステム。
- 前記光学キャビティ内の前記電磁放射の前記光学キャビティから出力された部分は、周波数シフタから前記装置に出力される請求項6に記載のシステム。
- 前記周波数シフタは、前記光学キャビティから前記電磁放射を受け取り、前記受け取った電磁放射を、前記光学キャビティから出力される前記電磁放射の一部分が前記周波数シフタによってゼロ次回折されるように回折させる請求項7に記載のシステム。
- 前記周波数シフタは、前記光学キャビティから電磁放射を受け取り、前記光学キャビティに戻された前記受け取った電磁放射の周波数シフトされた部分が、前記周波数シフタによって一次回折されるように前記受け取った電磁放射を回折させる請求項1に記載のシステム。
- 前記光学キャビティは、リングキャビティを備える請求項1に記載のシステム。
- 前記少なくとも1つの光学要素は、ミラー、レンズ、プリズムまたは光ファイバの少なくとも1つを備える請求項1に記載のシステム。
- 前記光スイッチは、前記受け取った電磁放射を、前記光学キャビティの光学長と実質的に等しい期間、前記光学キャビティから外にダンプするように制御可能である請求項1に記載のシステム。
- 前記周波数シフタは、音響光学ブラッグセルを備える請求項1に記載のシステム。
- 電磁放射を制御可能にチャープする方法であって、
光学キャビティを形成する段階と、
電磁放射を初期周波数で前記光学キャビティに導入する段階と、
前記光学キャビティ内の前記電磁放射の周波数を、実質的に線形のチャープレートで前記初期周波数からシフトする段階と、
前記光学キャビティ内に蓄えられた前記電磁放射の一部分を前記光学キャビティからダンプするように光スイッチを開く段階と、
電磁放射を前記初期周波数で光学キャビティに導入する段階とを含む方法。 - 前記光学キャビティ内の前記電磁放射を増幅する段階を更に含む請求項14に記載の方法。
- 前記キャビティ内の前記電磁放射の一部分を装置に出力する段階を更に含む請求項14に記載の方法。
- 前記光学キャビティ内の前記電磁放射の前記周波数をシフトする段階は、前記光学キャビティ内の前記電磁放射を回折させる段階を含む請求項14に記載の方法。
- 前記光学キャビティは、リングキャビティを備える請求項14に記載の方法。
- 前記電磁放射の一部分をダンプするためにスイッチを開く段階と、電磁放射を前記初期周波数で前記光学キャビティに導入する段階が同時に実行される請求項14に記載の方法。
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US11/353,124 US8081670B2 (en) | 2006-02-14 | 2006-02-14 | System and method for providing chirped electromagnetic radiation |
PCT/US2007/062117 WO2007095565A2 (en) | 2006-02-14 | 2007-02-14 | System and method for providing chirped electromagnetic radiation |
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WO2007095565A2 (en) | 2007-08-23 |
JP5579392B2 (ja) | 2014-08-27 |
WO2007095565A3 (en) | 2008-04-03 |
EP1984992A2 (en) | 2008-10-29 |
EP1984992A4 (en) | 2011-01-19 |
CN101421888A (zh) | 2009-04-29 |
CA2642474C (en) | 2015-07-21 |
US8081670B2 (en) | 2011-12-20 |
CN101421888B (zh) | 2011-05-11 |
AU2007214439A1 (en) | 2007-08-23 |
US20120189027A1 (en) | 2012-07-26 |
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CA2642474A1 (en) | 2007-08-23 |
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